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Artigos de revistas sobre o assunto "Visual motor response test"
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Hadar, Aviad A., Avi Lazarovits, and Kielan Yarrow. "Increased Motor Cortex Excitability for Concealed Visual Information." Journal of Psychophysiology 33, no. 4 (2019): 286–95. http://dx.doi.org/10.1027/0269-8803/a000230.
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Abstract. Deceptive behavior involves complex neural processes involving the primary motor cortex. The dynamics of this motor cortex excitability prior to lying are still not well understood. We sought to examine whether corticospinal excitability can be used to suggest the presence of deliberately concealed information in a modified version of the guilty knowledge test (GKT). Participants pressed keys to either truthfully or deceitfully indicate their familiarity with a series of faces. Motor-evoked potentials (MEPs) were recorded during response preparation to measure muscle-specific neural excitability. We hypothesized that MEPs would increase during the deceptive condition not only in the lie-telling finger but also in the suppressed truth-telling finger. We report a group-level increase in overall corticospinal excitability 300 ms following stimulus onset during the deceptive condition, without specific activation of the neural representation of the truth-telling finger. We discuss cognitive processes, particularly response conflict and/or automated responses to familiar stimuli, which may drive the observed nonspecific increase of motor excitability in deception.
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Taylor, J. L., and D. I. McCloskey. "Triggering of preprogrammed movements as reactions to masked stimuli." Journal of Neurophysiology 63, no. 3 (1990): 439–46. http://dx.doi.org/10.1152/jn.1990.63.3.439.
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1. Visual stimuli were presented to normal human subjects to test simple and more complex voluntary motor responses. Large and small visual stimuli were presented. In some trials, the small stimulus was followed 50 ms later by the large stimulus, so that the small stimulus was not perceived; this is the phenomenon of "backward masking." 2. Although subjects were not able to detect the masked, visual stimulus on forced-choice testing, they performed motor, reaction-time (RT) tasks in response to it. The RTs for responses to the masked stimulus were the same as those for responses to the easily perceived, nonmasked stimulus. 3. This result confirms and extends the findings of Fehrer and Biederman and was demonstrated with both simple and more complex motor responses. 4. Discussion of the findings focuses on their implications for motor control, particularly with respect to the preprogramming of voluntary movement.
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Marino, Robert A., Ron Levy, and Douglas P. Munoz. "Linking express saccade occurance to stimulus properties and sensorimotor integration in the superior colliculus." Journal of Neurophysiology 114, no. 2 (2015): 879–92. http://dx.doi.org/10.1152/jn.00047.2015.
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Express saccades represent the fastest possible eye movements to visual targets with reaction times that approach minimum sensory-motor conduction delays. Previous work in monkeys has identified two specific neural signals in the superior colliculus (SC: a midbrain sensorimotor integration structure involved in gaze control) that are required to execute express saccades: 1) previsual activity consisting of a low-frequency increase in action potentials in sensory-motor neurons immediately before the arrival of a visual response; and 2) a transient visual-sensory response consisting of a high-frequency burst of action potentials in visually responsive neurons resulting from the appearance of a visual target stimulus. To better understand how these two neural signals interact to produce express saccades, we manipulated the arrival time and magnitude of visual responses in the SC by altering target luminance and we examined the corresponding influences on SC activity and express saccade generation. We recorded from saccade neurons with visual-, motor-, and previsual-related activity in the SC of monkeys performing the gap saccade task while target luminance was systematically varied between 0.001 and 42.5 cd/m2 against a black background (∼0.0001 cd/m2). Our results demonstrated that 1) express saccade latencies were linked directly to the arrival time in the SC of visual responses produced by abruptly appearing visual stimuli; 2) express saccades were generated toward both dim and bright targets whenever sufficient previsual activity was present; and 3) target luminance altered the likelihood of producing an express saccade. When an express saccade was generated, visuomotor neurons increased their activity immediately before the arrival of the visual response in the SC and saccade initiation. Furthermore, the visual and motor responses of visuomotor neurons merged into a single burst of action potentials, while the visual response of visual-only neurons was unaffected. A linear combination model was used to test which SC signals best predicted the likelihood of producing an express saccade. In addition to visual response magnitude and previsual activity of saccade neurons, the model identified presaccadic activity (activity occurring during the 30-ms epoch immediately before saccade initiation) as a third important signal for predicting express saccades. We conclude that express saccades can be predicted by visual, previsual, and presaccadic signals recorded from visuomotor neurons in the intermediate layers of the SC.
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Müller, Sean, Yasmin Gurisik, Mark Hecimovich, Allen G. Harbaugh, and Ann-Maree Vallence. "Individual Differences in Short-Term Anticipation Training for High-Speed Interceptive Skill." Journal of Motor Learning and Development 5, no. 1 (2017): 160–76. http://dx.doi.org/10.1123/jmld.2016-0029.
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Training studies in a variety of domains focus on between-group comparisons. This study investigated individual differences in learning based upon visual anticipation training using field hockey goalkeeping as the exemplar motor skill. In a within-subject design, four state-league level field hockey goalkeepers were tested before and after visual anticipatory training in an in-situ test that required them to save goals from a drag flick. Response initiation time and response accuracy were measured. Participants were tested at baseline, completed a control phase of sport-specific practice, were retested, then given an intervention phase of temporal occlusion training plus sport-specific practice, and retested. Results indicated that two goalkeepers’ response initiation times were earlier after the intervention. Effect sizes indicated that the two goalkeepers improved response accuracy after the intervention. Another goalkeeper’s response initiation time was later after the intervention, but this did not impede response accuracy of goals saved. The mechanism of individual learning appeared to be modulation of response timing to save goals. Anticipation training can improve in-situ visual-perceptual motor skill performance in an individualized and nonlinear fashion. Further research is needed to better understand how each individual learns the visual-perceptual motor skills of high time-stress tasks in the sport domain.
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Brown, Rachel M., and Virginia B. Penhune. "Efficacy of Auditory versus Motor Learning for Skilled and Novice Performers." Journal of Cognitive Neuroscience 30, no. 11 (2018): 1657–82. http://dx.doi.org/10.1162/jocn_a_01309.
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Humans must learn a variety of sensorimotor skills, yet the relative contributions of sensory and motor information to skill acquisition remain unclear. Here we compare the behavioral and neural contributions of perceptual learning to that of motor learning, and we test whether these contributions depend on the expertise of the learner. Pianists and nonmusicians learned to perform novel melodies on a piano during fMRI scanning in four learning conditions: listening (auditory learning), performing without auditory feedback (motor learning), performing with auditory feedback (auditory–motor learning), or observing visual cues without performing or listening (cue-only learning). Visual cues were present in every learning condition and consisted of musical notation for pianists and spatial cues for nonmusicians. Melodies were performed from memory with no visual cues and with auditory feedback (recall) five times during learning. Pianists showed greater improvements in pitch and rhythm accuracy at recall during auditory learning compared with motor learning. Nonmusicians demonstrated greater rhythm improvements at recall during auditory learning compared with all other learning conditions. Pianists showed greater primary motor response at recall during auditory learning compared with motor learning, and response in this region during auditory learning correlated with pitch accuracy at recall and with auditory–premotor network response during auditory learning. Nonmusicians showed greater inferior parietal response during auditory compared with auditory–motor learning, and response in this region correlated with pitch accuracy at recall. Results suggest an advantage for perceptual learning compared with motor learning that is both general and expertise-dependent. This advantage is hypothesized to depend on feedforward motor control systems that can be used during learning to transform sensory information into motor production.
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Nikishena, I. S., V. A. Ponomarev, and J. D. Kropotov. "Event-Related Potentials of the Human Brain During the Comparison of Visual Stimuli." Физиология человека 49, no. 3 (2023): 67–77. http://dx.doi.org/10.31857/s0131164622600902.
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The aim of the investigation was to study the features of the brain activity when comparing visual stimuli under conditions of delayed motor response. Event-related potentials (ERP) were studied in 84 healthy subjects in a three-stimulus test, the first two stimuli were a comparison pair, and the third stimulus triggered a motor response. After presentation of the second stimulus ERP were recorded: a complex of two waves with occipital (Oz, most pronounced in the interval 100–150 ms) and posterior temporal localization (P7, P8, 190–270 ms); negative oscillation in the frontal regions (Fz, 240–300 ms) and positive oscillation in the parietal regions (Pz, 270–450 ms). Brain responses differ in amplitude in case of match and discrepancy of visual stimuli. The article discusses the physiological meaning of these waves and their differences under two conditions.
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Lutskyi, Vasyl, Sergii Iermakov, and Iryna Kryventsova. "Visuo-motor response of students living in areas of military threat." Physical Culture, Recreation and Rehabilitation 2, no. 2 (2023): 70–80. http://dx.doi.org/10.15561/physcult.2023.0203.
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Background and Study Aim. In the modern fast-changing world, university students face a range of complex situations and challenges that require quick and accurate decision-making. In this context, the motor responses of students are crucial for successful adaptation to contemporary challenges. This is particularly important when students live in areas of military conflict. Therefore, the aim of this study is to assess the choice reaction and reaction time to visual stimuli through an online simulation test in university students. Material and Methods. The study involved students from three Ukrainian universities (physical culture faculties). A total of 86 students participated (men – n=38; women – n=48). An online simulation test was used to assess the visuo-motor reaction to visual stimuli. Information about the participants was collected through Google Form. For statistical analysis, the PyCharm CE development environment and various Python programming language libraries were used. Results. Differences in average visuo-motor reaction metrics were established among students from three universities. According to the test results, 9 men (27 clicks in 30 seconds) and 12 women (about 25 clicks in 30 seconds) were assigned to the first quartile. The best result was shown by students from university 2 (0.737 ± 0.19 ms). The best results by universities: men – university 3 (0.73 ± 0.106 ms); women – university 2 (0.785 ± 0.208 ms). It was determined that variations in time intervals between clicks decrease towards the end of the test. Conclusions. The impact of the conflict in Ukraine goes beyond direct physical threats, infiltrating the everyday existence of those in the impacted regions, encompassing college students. In such scenarios, prompt physical responses are vital for effectively adjusting to current challenges.
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Kwon, MinHyuk, and Evangelos A. Christou. "Visual information processing in older adults: reaction time and motor unit pool modulation." Journal of Neurophysiology 120, no. 5 (2018): 2630–39. http://dx.doi.org/10.1152/jn.00161.2018.
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Presently, there is no evidence that magnification of visual feedback has motor implications beyond impairments in force control during a visuomotor task. We hypothesized that magnification of visual feedback would increase visual information processing, alter the muscle activation, and exacerbate the response time in older adults. To test this hypothesis, we examined whether magnification of visual feedback during a reaction time task alters the premotor time and the motor unit pool activation of older adults. Participants responded as fast as possible to a visual stimulus while they maintained a steady ankle dorsiflexion force (15% maximum) either with low-gain or high-gain visual feedback of force. We quantified the following: 1) response time and its components (premotor and motor time), 2) force variability, and 3) motor unit pool activity of the tibialis anterior muscle. Older adults exhibited longer premotor time and greater force variability than young adults. Only in older adults, magnification of visual feedback lengthened the premotor time and exacerbated force variability. The slower premotor time in older adults with high-gain visual feedback was associated with increased force variability and an altered modulation of the motor unit pool. In conclusion, our findings provide novel evidence that magnification of visual feedback also exacerbates premotor time during a reaction time task in older adults, which is correlated with force variability and an altered modulation of motor unit pool. Thus these findings suggest that visual information processing deficiencies in older adults could result in force control and reaction time impairments. NEW & NOTEWORTHY It is unknown whether magnification of visual feedback has motor implications beyond impairments in force control for older adults. We examined whether it impairs reaction time and motor unit pool activation. The findings provide novel evidence that magnification of visual feedback exacerbates reaction time by lengthening premotor time, which implicates time for information processing in older adults, which is correlated with force variability and an altered modulation of motor unit pool.
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Bharmauria, Vishal, Amirsaman Sajad, Jirui Li, Xiaogang Yan, Hongying Wang, and John Douglas Crawford. "Integration of Eye-Centered and Landmark-Centered Codes in Frontal Eye Field Gaze Responses." Cerebral Cortex 30, no. 9 (2020): 4995–5013. http://dx.doi.org/10.1093/cercor/bhaa090.
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Abstract The visual system is thought to separate egocentric and allocentric representations, but behavioral experiments show that these codes are optimally integrated to influence goal-directed movements. To test if frontal cortex participates in this integration, we recorded primate frontal eye field activity during a cue-conflict memory delay saccade task. To dissociate egocentric and allocentric coordinates, we surreptitiously shifted a visual landmark during the delay period, causing saccades to deviate by 37% in the same direction. To assess the cellular mechanisms, we fit neural response fields against an egocentric (eye-centered target-to-gaze) continuum, and an allocentric shift (eye-to-landmark-centered) continuum. Initial visual responses best-fit target position. Motor responses (after the landmark shift) predicted future gaze position but embedded within the motor code was a 29% shift toward allocentric coordinates. This shift appeared transiently in memory-related visuomotor activity, and then reappeared in motor activity before saccades. Notably, fits along the egocentric and allocentric shift continua were initially independent, but became correlated across neurons just before the motor burst. Overall, these results implicate frontal cortex in the integration of egocentric and allocentric visual information for goal-directed action, and demonstrate the cell-specific, temporal progression of signal multiplexing for this process in the gaze system.
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Penhune, V. B., R. J. Zatorre, and A. C. Evans. "Cerebellar Contributions to Motor Timing: A PET Study of Auditory and Visual Rhythm Reproduction." Journal of Cognitive Neuroscience 10, no. 6 (1998): 752–65. http://dx.doi.org/10.1162/089892998563149.
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The perception and production of temporal patterns, or rhythms, is important for both music and speech. However, the way in which the human brain achieves accurate timing of perceptual input and motor output is as yet little understood. Central control of both motor timing and perceptual timing across modalities has been linked to both the cerebellum and the basal ganglia (BG). The present study was designed to test the hypothesized central control of temporal processing and to examine the roles of the cerebellum, BG, and sensory association areas. In this positron emission tomography (PET) activation paradigm, subjects reproduced rhythms of increasing temporal complexity that were presented separately in the auditory and visual modalities. The results provide support for a supramodal contribution of the lateral cerebellar cortex and cerebellar vermis to the production of a timed motor response, particularly when it is complex and/or novel. The results also give partial support to the involvement of BG structures in motor timing, although this may be more directly related to implementation of the motor response than to timing per se. Finally, sensory association areas and the ventrolateral frontal cortex were found to be involved in modality-specific encoding and retrieval of the temporal stimuli. Taken together, these results point to the participation of a number of neural structures in the production of a timed motor response from an external stimulus. The role of the cerebellum in timing is conceptualized not as a clock or counter but simply as the structure that provides the necessary circuitry for the sensory system to extract temporal information and for the motor system to learn to produce a precisely timed response.
Teses / dissertações sobre o assunto "Visual motor response test"
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Mercé, Théo. "High-throughput zebrafish larval locomotion assays of neuronal and muscular functions : Application to organophosphorus toxicity and antid." Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0011.
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La prévalence croissante des contaminants chimiques pose d'importants problèmes en matière de santé publique, nécessitant des méthodologies efficaces pour l'évaluation des risques toxicologiques. Un travail initial a été réalisé pour optimiser une nouvelle approche méthodologique (NAM) utilisant des éleuthéroembryons de poisson-zèbre, appelée electric field pulse motor response test (EFPMRT). La méthode vise à effectuer un criblage à haut débit des molécules chimiques induisant des défauts des capacités motrices et du contrôle postural. La robustesse, la reproductibilité, la productivité et la transférabilité de l'EFPMRT ont été améliorées en développant un nouvel outil logiciel, DanioTracker, effectuant l'analyse automatisée de points finaux liés au comportement locomoteur induit par la stimulation électrique. Ensuite, à l'aide d'une batterie de tests, la neurotoxicité induite par des composés organophosphorés (OP) et leurs métabolites a été évaluée. Les perturbations comportementales ont été évaluées en utilisant l'EFPMRT et un test neurocomportemental complémentaire dépendant des fonctions sensorielles, le visual motor response test (VMRT). La contribution de l'inhibition de l'acétylcholinestérase (AChE) et de la neuropathy target esterase (NTE) aux perturbations comportementales a été testée. Le chlorpyrifos, le parathion et le tri-ortho-crésyl-phosphate ont perturbé les fonctions intégratives de contrôle de la nage de manière quantitativement distincte et ont réduit les capacités neuromusculaires des éleuthéroembryons. Leurs métabolites respectifs, le chlorpyrifos-oxon, le paraoxon et le cresyl-saligénine-phosphate, ont intégralement inhibé l'AChE, induisant ainsi un syndrome cholinergique. Une étude comparative de l'efficacité d'un antidote réactivateur de l'AChE, le pralidoxime (2-PAM), pour atténuer certains effets toxiques, a été effectuée. L'antidote a induit une récupération face aux syndromes cholinergiques associés à l'exposition aux métabolites. De façon remarquable, le 2-PAM a également partiellement restauré les hyperactivités induites par les composés parents de manière vraisemblablement indépendante des activités AChE et NTE. Toutefois, il n'a pas restauré les dysfonctionnements neuromusculaires induits par le parathion ou le tri-ortho-crésyl-phosphate. Ceci suggère l’existence d’un ou plusieurs modes d'action (MOA) OP-spécifiques inconnus, associés aux composés parents mais pas aux métabolites correspondants, dont certains sont récupérables par le 2-PAM. Dans l'ensemble, ce travail offre une NAM robuste et transférable qui contribue à une stratégie d'évaluation globale des risques chimiques. Il révèle également des MOA alternatifs potentiels pour les OP sélectionnés, suggérant la nécessité de poursuivre les recherches sur les métabolites dans le cadre réglementaire, et contribue à la compréhension et à la prévention des troubles neurocomportementaux induits par les expositions environnementales seules ou en mixtures<br>The growing prevalence of chemical contaminants poses major public health concerns, necessitating efficient methodologies for toxicological risk assessment. An initial work was carried out to optimize a new approach methodology (NAM) using zebrafish pre-feeding larvae, called the electric field pulse (EFP) motor response test (EFPMRT). The method aims to perform a high-throughput screening of chemicals inducing motor capabilities and postural control defects. The robustness, reproducibility, productivity, and transferability of EFPMRT were enhanced by developing a novel software tool, DanioTracker, performing the automated analysis of endpoints linked to EFP-induced locomotor behavior. Then, using a battery of tests, the neurotoxicity induced by organophosphorus (OPs) compounds and their metabolites was assessed. Behavioral disruptions were evaluated using EFPMRT and a complementary sensory-dependent neurobehavioral test, the visual motor response test (VMRT). Contributions of acetylcholinesterase (AChE) and neuropathy target esterase (NTE) inhibition to behavioral disruptions were tested. Chlorpyrifos, parathion and tri-ortho-cresyl-phosphate disturbed integrative swimming control functions in quantitatively distinct manners and decreased the neuromuscular capacities of pre-feeding larvae. Their respective metabolites chlorpyrifos-oxon, paraoxon and cresyl-saligenin-phosphate fully inhibited AChE, thus inducing a cholinergic syndrome. Comparative study of the antidotal efficacy of an AChE reactivator, pralidoxime, in mitigating some toxic effects was performed. The antidote induced a recovery of the cholinergic syndromes associated with metabolites exposure. Strikingly, pralidoxime (2-PAM) also partially restored hyperactivities induced by parent compounds apparently independently of the activities of AChE and NTE. However, it did not restore neuromuscular dysfunctions induced by parathion or tri-ortho-cresyl phosphate. This suggests the existence of one or more unknown OP-specific multiple modes of action (MOAs) associated with parent compound but not corresponding metabolites, of which some are restorable by 2-PAM. Overall, this work offers a robust, transferable NAM that contributes to a comprehensive chemical risk assessment strategy. It also uncovers potential alternative MOA for selected OPs, suggesting the need for further research on metabolites within regulatory frameworks, and contributes to understanding and preventing neurobehavioral disorders induced by environmental exposures alone or in mixtures
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Ng, Hau-yi Pauline. "The bender visual motor gestalt test: across-cultural comparison." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1994. http://hub.hku.hk/bib/B29789424.
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Paterson, Gareth. "Visual-motor response times in athletes and non-athletes." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4346.
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Thesis (M Sport Sc (Sport Science))--University of Stellenbosch, 2010<br>ENGLISH ABSTRACT: The purpose of this study was to determine if there was a difference in mean VMRT between top-level men and women participating in selected ball sports compared to either a normative sample or to a non-athlete sample.
VMRT was measured using a new 40-light protocol on the Sport Vision Trainer (SVT). The SVT is a board consisting 80 circular lights controlled by a computer program. The SVT is designed to test visual-motor response time in participants. Data from top-level ball sport players were collected for both men (rugby and cricket) and women (netball and hockey). No significant differences in VMRT were found between the rugby players (n=24) and either the normal sample (n=81) or the non-athlete men (n=24). No significant difference in VMRT were found between the cricket players (n=10) and the non-athlete men. However, the cricket players were found to have significantly slower VMRT than the normal sample of men (n=81). No significant differences in VMRT were found between the netball players (n=19), the hockey players (n=14) and either the normal sample of women (n=84) or the non-athlete women (n=26).
The conclusions drawn from this study support the position that VMRT may not be a key performance indicator in top-level ball sport performance and that the expert advantage may be located in other variables, such as anticipation and visual search.<br>AFRIKAANSE OPSOMMING: Die doel van die studie was om the ondesoek of daar verkille was in die gemiddelde visuele-motoriese reaksie tyd (VMRT) tussen top-vlak bal sport atlete en òf „n normale steekproef òf „n steekproef van nie-atlete.
VMRT was gemeet met „ nuwe 40-lig protokol op die Sport Vision Trainer. Inligting van die top-vlak bal sport atlete was ingesamel vir beide mans (rugby en krieket) en dames (netabl en hokkkie) Geen statisties beduidende verskille was gevind vir VMRT tussen die rugby spelers (n=24) en beide van die normale (n=81) of nie-atleet mans steekproef (n=24). Geen statisties beduidende verskille was gevind tussen die krieket spelers (n=10) en die nie-atleet mans nie. Alhoewel die krieket spelers het „n statistie beduidende stadiger VMRT as die normale steekproef mans gehad (n=81). Geen beduidende verskille in VMRT was gevind tussen die netbal spelers (n=19), die hokkie spelers (n=14) en beide van die normale steekproef dames (n=84) of die nie-atletiese dames nie (n=26).
Die gevolgtrekking wat gemaak kan word uit die studie ondersteun die standpunt dat VMRT nie „n sleutel prestasie voorspeller in top-vlak bal sportsport prestasie is nie en dat die topvlak speler voordeel deur ander visuele veranderlikes soos antispiasie en “visual search” ondersoek kan word.
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De, Faria Newton. "A non-invasive visual evoked cortical potential test for detection of early glaucoma damage /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.
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Mercier, Louisette. "Héminégligence visuelle: impacts d'une nouvelle disposition des réponses au "motor free visual perceptual test" (m.v.p.t.)." Mémoire, Université de Sherbrooke, 1992. http://hdl.handle.net/11143/10921.
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L'héminégligence visuelle se rencontre suite à une lésion cérébrale et les victimes se retrouvent principalement chez les personnes âgées. L'individu atteint d'une héminégligence visuelle présente une difficulté à orienter son attention dans l'espace controlatéral à la lésion cérébrale et a tendance à négliger les stimuli provenant de ce côté. Le mode de disposition des réponses d'une évaluation perceptuelle peut entraver la reconnaissance d'autres déficits reliés à la perception visuelle. L'objectif de l'étude est de vérifier s'il est possible de limiter l'interférence du problème d'héminégligence visuelle lors d'une évaluation globale de la fonction visuelle en modifiant le mode de disposition des réponses d'un test utilisé en ergothérapie, le Motor Free Visual Perceptual Test (M.V.P.T.). Pour pallier à cet aspect de l'héminégligence visuelle, le mode horizontal de disposition des réponses dans le test original a été remplacé par une disposition verticale sur la ligne médiane du champ visuel central. L'échantillon, par choix raisonnés, est composé de 24 sujets cérébrolésés droits et de 15 sujets normaux n'ayant pas d'histoire connue de lésion cérébrale. La présence de l'héminégligence visuelle a été déterminée par le test d'Albert et le test des cloches. Les sujets ont exécuté les deux formes du M.V.P.T. dans un ordre aléatoire et l'étude statistique a porté sur la différence obtenue pour la performance et pour la situation des réponses. Les étapes de réalisation ont d'abord permis la vérification du degré d'équivalence entre la forme originale et modifiée auprès de sujets sans déficits cérébraux et de sujets cérébrolésés droits sans héminégligence visuelle. Les résultats confirment les attentes prévues en terme d'équivalence entre les deux formes du M.V.P.T. La deuxième étape, auprès de sujets cérébrolésés droits présentant une héminégligence visuelle, a mis en évidence une différence significative quant à la situation des réponses et la performance, favorisant la version modifiée comme outil permettant de mieux évaluer la perception visuelle chez des héminégligents. Les résultats de cette étude permettent de reconsidérer l'approche utilisée tant pour le traitement que pour l'évaluation des personnes présentant un trouble d'héminégligence visuelle telle que l'importance de vérifier s'il y a présence d'héminégligence visuelle avant de débuter une évaluation perceptuelle et s'il y a héminégligence visuelle, d'utiliser une présentation de type verticale pour l'obtention d'un profil plus réel des capacités et limites reliées à la perception visuelle. De plus, l'étude met en évidence la nécessité d'être attentif à l'interprétation des résultats d'une évaluation perceptuelle globale qui ne tient pas compte du comportement de l'héminégligent.
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Morrongiello, Michael A. "Visual-motor development and the emergence of emotional indicators : a reexamination of the Bender gestalt test with young children." Virtual Press, 1989. http://liblink.bsu.edu/uhtbin/catkey/720305.
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The purpose of this investigation was to determine the extent to which visual-motor maturity influenced the emergence of diagnostic emotional signs on the Bender Gestalt Test. The Bender Gestalt Test was administered to 400 first and second grade students from lower middle class homes in Wisconsin. The subjects were in regular education classes and were, therefore, not identified as having learning or emotional problems. Each subject was given a Bender Gestalt Test, which was subsequently scored for developmental errors and emotional indicators according to the Koppitz system. Pearson product moment correlation coefficients were computed for all emotional indicators and all developmental errors. This was referred to as the omnibus correlation coefficient. Correlations were also computed for all developmental errors and each emotional indicator. A coefficient of determination was computed for all developmental errors and all emotional indicators. Finally, the frequency of each emotional indicator was plotted at each developmental age. The omnibus correlation and the following emotional indicators attained statistical significance confused order, wavy line, increased size, and small size. All of the correlations indicated little if any relationship exists between emotional indicators and developmental errors. In addition, little if any variance is shared by the two above named entities. While the appearance of confused order and increasing size can be attributed to developmental factors, the emergence of small size cannot. Several emotional indicators appear almost unrelated to visual-motor development, specifically dashes for circles, large size, and expansion. When these emotional indicators appear in the protocols of young children further investigation regarding emotional functioning seems warranted. Wavy line and confused order do appear frequently. This suggests that it is not unusual for children to render these emotional indicators.<br>Department of Educational Psychology
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Lotz, Leslie. "Assessment of visual-motor integration functioning in a selected South African middle childhood sample." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53300.
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On t.p.: Degree of Masters of Science (Counselling Psychology)<br>Thesis (MSc)--Stellenbosch University, 2003.<br>ENGLISH ABSTRACT: During middle childhood, cognitive, social, emotional and self-concept development is of importance,
and prepares the child for the adaptation and challenges awaiting the child in adolescence. Visualmotor
integration is described by various sources as playing an important role in the development of a
child. Visual-motor integration is the child's ability to integrate visual perceptual skills with fine motor
coordination. In order to assess visual-motor integration functioning, the Developmental Test of Visual-
Motor Integration (VMJ) (Beery, 1989) is often applied. Considering visual-motor integration
functioning as an integral part of the drawing task (Harris, 1963), the Goodenough-Harris Drawing
Test (GHD) may also convey important information ofa child's visual-motor integration functioning.
The primary aim of the present study was to determine the status of visual-motor integration
functioning of the selected group of middle childhood children within the South African context, in
order to identify possible delays. Visual-motor integration functioning was determined by the
children's performance on GHD and the VMI. Academic achievement results were also reviewed to
determine the chosen sample's status in this regard. The obtained results were analyzed and
summarized in order to obtain information leading to the fulfillment of the primary aim.
The secondary aim of the present study flows parallel to the primary aim, and was motivated by the
need to discover an effective, child-friendly measurement tool of visual-motor integration, applicable at
a young age, as to gain accurate knowledge of a child's visual-motor integration functioning. The
secondary aim consisted of exploring a) the correlations (if any) between the results of the
Goodenough-Harris Drawing Test (GHD) and the biographical variables of gender, chronological
age and socioeconomic status, b) the correlations (if any) between the results of the Beery
Developmental test of Visual-Motor Integration (VMI) and the above-mentioned variables, c) the
correlations (if any) between academic achievement and the above-mentioned variables and test results,
and d) the correlations (if any) between the VMI and GHD results, in order to compare different tests of
visual-motor integration.
Three hundred and thirty nine participants attending grade one to four in a specific primary school,
took part in this study. The study resulted in various conclusions regarding the status of visual-motor integration functioning, the most relevant being that the selected sample presents with functioning
levels lower than that which is expected for children their age, in their achievement on both the VMI
and the GHD, implying possible visual-motor integration functioning challenges. This finding implies
the need to implement effective intervention programmes in order to address this seemingly evident
delay.
Conclusions regarding the vanous relationships between the test results and certain biographical
variables include the following: It was found that the relationship between socioeconomic status and
childhood development, as reflected by the correlation between socioeconomic status and the GHD,
seems very important in the South African context. When considering gender differences, females
achieved lower scores on both tests applied in the present study than males. Chronological age
correlated significantly with scores on the VMI. It was further shown that visual-motor integration
functioning could have a significant impact on academic achievement.
The VMI and GHD results were compared, in order to compare different tests of visual-motor
integration. High scores on the GHD related significantly to high scores on the VMI. Although the
present study was unable to confirm the superiority of one test, various considerations were discussed
leading to the identification of a child-friendly test of visual-motor integration. The present study
highlights the importance of identifying and addressing developmental delays in general, and visualmotor
integration functioning in specific, in order to ensure the development of middle childhood
children to their complete potential in the South African context. It also underlines the need for
effective, child-friendly assessment tools of visual-motor integration that will ensure the effective
identification of developmental delays.<br>AFRIKAANSE OPSOMMING: Gedurende middelkinderjare is kognitiewe-, emosionele- en selfbeeldontwikkeling van belang, omdat
dit die kind voorberei vir die verwagte aanpassings en uitdagings tydens adolessensie. Visueelmotoriese
integrasie speel 'n sentrale rol in kinderontwikkeling. Visueel-motoriese integrasie word
beskryf as die kind se vermoë om visueel-perseptuele vaardighede te integreer met fyn-motoriese
koërdinasie, Die VMI (Developmental Test of Visual-Motor Integration, Beery (1989)) word gereeld as
meetinstrument gebruik vir visueel-motoriese integrasie. Omdat visueel-motoriese integrasie 'n sentrale
deel van 'n kind se tekenvaardighede is, is die GHD (Goodenough-Harris Drawing Test) ook toepaslik
om informasie rakende 'n kind se visueel-motoriese integrasie funksionering te bepaal.
Die primêre doel van die huidige studie was om die status van visueel-motoriese integrasie
funksionering van 'n gekose groep kinders in die middelkinderjare binne die Suid-Afrikaanse konteks,
te bepaal. Hierdie doel is bereik deur die toepassing van die VMI en die GHD. Akademiese resultate is
verder in ag geneem. Die analisering van die finale resultate en data het gelei tot belangrike afleidings
rakende die status van die geselekteerde steekproef.
Die sekondêre doel was gemotiveer deur die behoefte om 'n effektiewe, kindervriendelike
meetinstrument van visueel-motoriese integrasie te identifiseer, wat toepaslik is op 'n jong ouderdom,
en akkurate kennis rakende 'n kind se visueel-motoriese integrasie funksionering tot gevolg het. Om
die sekondêre doel aan te spreek, is die volgende ondersoek: a) die korrelasies (indien enige) tussen die
resultate van die GHD en sekere biografiese veranderlikes, naamlik geslag, chronologiese ouderdom en
sosio-ekonomiese status; b) die korrelasies (indien enige) tussen die resultate van die VMI en die
bogenoemde biografiese veranderlikes; c) die korrelasies (indien enige) tussen akademiese resultate en
die bogenoemde veranderlikes en toets resultate; en d) die korrelasies (indien enige) tussen die GHD en
die VMI resultate, ten einde verskillende toetse van visueel-motoriese integrasie te vergelyk.
Die huidige studie dui op vele gevolgtrekkings rakende die status van visueel-motoriese integrasie
funksionering in die geselekteerde steekproef; die mees relevante dat die steekproef funksioneer op 'n
vlak wat laer is as dit wat verwag word vir kinders van hulouderdom. Hierdie gevolgtrekking is gebaseer op die resultate van beide die GHD en die VMI, en impliseer moontlike visueel-motoriese
integrasie agterstande. Hierdie bevinding dui op 'n behoefte vir effektiewe intervensie programme wat
hierdie oënskynlike agterstande sal aanspreek.
Gevolgtrekkings rakende die vele verwantskappe tussen die toetsresultate en sekere biografiese
veranderlikes, sluit die volgende in: kinderfunksionering, soos gereflekteer deur die resultate van die
GHD, is beduidend verwant aan sosio-ekonomiese status. Hierdie verskynsel blyk belangrik te wees in
die Suid-Afrikaanse konteks. Met in agneming van geslagsverskille, het vroulike deelnemers
beduidend swakker resultate in beide die GHD en die VMI as manlike deelnemers getoon.
Chronologiese ouderdom het beduidend met VMI resultate gekorreleer. Laastens het dit ook gevolg dat
visueel-motoriese integrasie, soos reflekteer deur die resultate van beide die VMI en die GHD, 'n
beduidende verwantskap tot akademiese funksionering toon.
'n Vergelyking tussen die resultate van die VMI en die GHD het gelei tot die gevolgtrekking dat
hierdie twee toetse beduidend positief verwant is. Hoë tellings op die GHD het verband gehou met hoë
tellings op die VMI. Alhoewel die resultate van die huidige studie nie die superioriteit van die gebruik
van die een toets bo die van die ander kon bevestig nie, is verskeie oorwegings verder bespreek wat in
ag geneem behoort te word tydens die seleksie van 'n kindervriendelike meetinstrument van visueelmotoriese
integrasie. Die huidige studie is van waarde in die beklemtoning van die belangrikheid om
ontwikkelingsagterstande in die algemeen, en spesifiek in visueel-motoriese integrasie funksionering,
spoedig te identifiseer en aan te spreek. Die uitvoering hiervan mag 'n bydra lewer tot die ontwikkeling
van kinders se potensiaal in die Suid-Afrikaanse konteks. Die studie beklemtoon verder die
belangrikheid van effektiewe, kindervriendelike meetinstrumente van visueel-motoriese integrasie, wat
die identifisering van hierdie ontwikkelingsagterstande sal verseker.
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Palmer, Hanli. "Normative indicators for grade 3 and grade 7 isiXhosa-speaking children on the Bender Visual-Motor Gestalt Test (Second Edition)." Thesis, University of Fort Hare, 2016. http://hdl.handle.net/10353/6346.
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Selecting appropriate normative data for the purpose of evaluating psychometric test scores forms an integral part of the interpretative psychological assessment process. This highlights the well-known problem of utilising measures developed in the United Kingdom (UK), or the United States (US) and accepting their norms unreservedly for the practice on local populations, which questions the tests’ validity and reliability. The current study, which aimed to collect normative indicators on the Bender Gestalt Test (Second Edition), forms part of the continuing effort to develop norms for psychological tests in South Africa, and to focus on the valid and reliable use of measures within the context of South Africa’s multicultural and multilingual population groups. The participants of the research were Black isiXhosa-speaking Grade 3 and Grade 7 learners aged 8 to 9 years (N = 38 ), and 12 to 13 years (N = 23), obtaining their school education in the disadvantaged educational setting of the former Department of Education and Training (ex-DET) schools. The tests were scored according to the Bender Gestalt Test (Second Edition) manual, using the Global Scoring System. Thereafter, the raw scores were converted to Standard Scores, T-scores and Percentile Ranks using the US normative tables, according to chronological age categories. When the two groups were compared to the US norms, the results equated favourably for the present study sample. There were no significant findings in relation to the classroom size or any difference in performance between the schools who participated. The only significant difference revealed between male and female participants was with the Grade 7 sample group, where the males scored significantly lower than females on the Recall phase. These results support the prospect of the continuous revision of norms, and it is suggesting that the cognitive processes measured by this test are likely to derive from robust neurological substrates that are relatively stable across cultural groups.
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Chan, Po-wah, and 陳寶華. "Visual-motor development and its relationship with the academic performance in the Hong Kong young children: the Bender Gestalt Test." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B31959258.
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Chan, Po-wah. "Visual-motor development and its relationship with the academic performance in the Hong Kong young children : the Bender Gestalt Test /." Hong Kong : University of Hong Kong, 1997. http://sunzi.lib.hku.hk/hkuto/record.jsp?B18876729.
Texto completo da fonteLivros sobre o assunto "Visual motor response test"
1
Hammill, Donald D. Test of Visual-Motor Integration: TVMI. Pro-Ed, 1996.
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2
Colarusso, Ron. MVPT-3: Motor-free visual perception test. 3rd ed. Academic Therapy Publications, 2003.
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3
Brannigan, Gary G. Bender Gestalt II: Bender Visual Motor Gestalt Test : examiner's manual. 2nd ed. Riverside Pub., 2003.
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4
Gardner, Morrison F. TVMS (UL): Test of Visual-Motor Skills (Upper Level) : manual. Psychological and Educational Publications, 1992.
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5
Gardner, Morrison F. TVPS-UL, test of visual-perceptual skills (non-motor) upper level: Manual. Psychological and Educational Publications, Inc., 1992.
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6
L, Hutt Max. The Hutt adaptation of the Bender-gestalt test: Rapid screening and intensive diagnosis. 4th ed. Grune & Stratton, 1985.
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7
Otto, Weininger. The differential diagnostic technique, a visual motor projective test: Research and clinical use. Thomas, 1986.
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8
The Beery-Buktenica VMI: Developmental test of visual-motor integration with supplemental developmental tests of visual perception and motor coordination : administration, scoring, and teaching manual. 4th ed. Modern Curriculum Press, 1997.
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J, Raphael Alan, ed. Advanced psychodiagnostic interpretation of the Bender Gestalt test: Adults and children. Praeger, 1992.
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10
EEG-Veränderungen bei einer psychomotorischen Koordinationsaufgabe: Vigilanzregulierung des Benzodiazepins Lormetazepam (Noctamid) in Ruhe-Episoden und in psychomotorischen Aktivierungsphasen. P. Lang, 1992.
Encontre o texto completo da fonteCapítulos de livros sobre o assunto "Visual motor response test"
1
Walrath, Robert. "Bender Visual Motor Gestalt Test." In Encyclopedia of Child Behavior and Development. Springer US, 2011. http://dx.doi.org/10.1007/978-0-387-79061-9_319.
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Nelson, Linda D. "Bender-Gestalt Visual Motor Test." In Encyclopedia of psychology, Vol. 1. American Psychological Association, 2000. http://dx.doi.org/10.1037/10516-142.
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Decker, Scott L., and Jessica A. Carboni. "Bender Visual–Motor Gestalt Test II." In Encyclopedia of Clinical Neuropsychology. Springer New York, 2011. http://dx.doi.org/10.1007/978-0-387-79948-3_1439.
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Decker, Scott L., and Rachel M. Bridges. "Bender Visual-Motor Gestalt Test II." In Encyclopedia of Clinical Neuropsychology. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-56782-2_1439-2.
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Decker, Scott L., and Rachel M. Bridges. "Bender Visual-Motor Gestalt Test II." In Encyclopedia of Clinical Neuropsychology. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-57111-9_1439.
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Brown, Ted. "Visual-Motor Integration, Developmental (VMI) Test." In Encyclopedia of Autism Spectrum Disorders. Springer New York, 2018. http://dx.doi.org/10.1007/978-1-4614-6435-8_280-3.
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Stabel, Aaron, Kimberly Kroeger-Geoppinger, Jennifer McCullagh, et al. "Developmental Test of Visual-Motor Integration." In Encyclopedia of Autism Spectrum Disorders. Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4419-1698-3_101435.
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Macy, Kelly, Wouter Staal, Cate Kraper, et al. "Bender Visual-Motor Gestalt Test II." In Encyclopedia of Autism Spectrum Disorders. Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4419-1698-3_1377.
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Offit, Paul A., Anne Snow, Thomas Fernandez, et al. "Visual-Motor Integration, Developmental (VMI) Test." In Encyclopedia of Autism Spectrum Disorders. Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4419-1698-3_280.
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South, Mikle, and Jessica Palilla. "Bender Visual-Motor Gestalt Test II." In Encyclopedia of Autism Spectrum Disorders. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-319-91280-6_1377.
Texto completo da fonteTrabalhos de conferências sobre o assunto "Visual motor response test"
1
Paunescu, Mihaela, Vasilica Grigore, and Radu Predoiu. "THE ABILITY TO FOCUS ATTENTION - PREDICTOR FOR THE DECISION TIME IN SPORT." In eLSE 2015. Carol I National Defence University Publishing House, 2015. http://dx.doi.org/10.12753/2066-026x-15-219.
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Attention implies the existence of a certain degree of focalization on a region which becomes central in relation to the rest of the ensemble, which comes to occupy a marginal position. Attention is the psychical phenomenon (mental function) which designates the selective orientation of the activity and the focalization of the mental energy on an object, in order to know it better and to act more efficiently. This study was carried out on a number of 50 female participants: 35 practitioners of tennis and 15 practitioners of aerobic gymnastics. We assessed attention concentration through the computerized test TAC and the simple and discrimination reaction time through the TR and TRD Tests, of the battery of tests PSISELTEVA. The TAC test consists in giving a pre-established answer for each signal-stimulus identified among insignificant stimuli. The TR test suposes promptitude of reactions, the diagnostic scope being the measurement of the simple reaction time. In the case of TRD test, the appearance of the red square represents the signal-stimulus - the participant's task is to issue a motor response by pushing a lever as fast as he can. By subtracting the corresponding reaction time pairs one can measure the decision time. Using the simple linear regression, we highlighted that the results for the attention concentration under fast speed conditions can be used as predictors for the decision time. The development of the ability to focus attention under fast speed conditions influences female athletes capacity to discriminate visual signs (female practicing tennis and aerobic gymnastics register a better time in order to identify the correct stimuli)
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Patel, Krishna, Michael Stevens, Suyash Adhikari, Greg Book, Muhammad Mubeen, and Godfrey Pearlson. "Acute cannabis-related alterations in an fMRI time estimation task." In 2022 Annual Scientific Meeting of the Research Society on Marijuana. Research Society on Marijuana, 2022. http://dx.doi.org/10.26828/cannabis.2022.02.000.26.
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Introduction: Cannabis is widely popular recreational drug of choice in the US. The drug is known to alter the subjective experience of time. However, its effects on time estimation at a brain level are still largely unexplored. Our goal was to investigate acute effects of cannabis on an fMRI time estimation task by evaluating brain activation differences between cannabis and placebo conditions. We hypothesized that participants’ time estimation accuracy and corresponding BOLD response would be altered during the cannabis condition in a dose-related manner, compared to placebo. Methods: In this placebo-controlled, double-blind randomized trial, a total of N=44 participants had 3 dose visits, at each of which they received either high-dose cannabis (0.5 gm of ~12.5% THC flower), low dose cannabis (0.5 gm of ~5.7% flower) or 0.5 gm placebo, using paced inhalation from a volcano via vaporizer. Drug material was supplied by NIDA/RTI. For the current study we analyzed fMRI data from the first of placebo and high dose fMRI sessions throughout each dosing day in which participants performed a time estimation task. Participants were asked to respond with a mouse click as to which box of two boxes displayed for different intervals was displayed on the screen longer. Both sub-second and supra-second temporal intervals were tested, with a range of easy to hard discriminations. We used the Human Connectome Project processing pipeline to prepare fMRI data for GLM modeling of activation using the FSL FEAT toolbox. This model estimated the unique effect sub-second (short) and supra-second (long) interval discrimination, their average effect, and their difference. From these contrasts, the mean activation amplitudes within 387 brain parcels from the Human Connectome cortical atlas were extracted. Robust statistics in R software estimated a paired t test equivalent using the bootdpci function to assess the difference between placebo and the high dose drug conditions for each contrast. Results: Only premotor cortex survived False Discovery Rate corrections for searching all 387 parcels across the entire brain for the average of short and long temporal estimation conditions. Numerous other brain regions differed between placebo and high doses at p<.05 uncorrected for various task contrasts: Short duration stimuli: Premotor cortex, posterior cingulate cortex, medial temporal cortex, visual area, somatosensory cortex, anterior cingulate and medial prefrontal cortex, paracentral and mid-cingular cortex, inferior frontal cortex. Long duration stimuli: Premotor cortex, visual areas, somatosensory motor cortex, paracentral and mid- cingulate cortex, the tempo-parieto-occipital junction, dorsolateral-prefrontal cortex, posterior opercular cortex, medial temporal cortex, posterior cingulate cortex, orbito-frontal cortex. Average of short and long duration stimuli: Premotor cortex, somatosensory and motor cortex, posterior cingulate cortex, visual are, medial temporal cortex, paracentral and midcingulate cortex, anterior cingulate and medial prefrontal cortex, inferior frontal cortex, tempo-parieto-occipital junction, premotor cortex, somatosensory motor cortex, posterior cingulate cortex, medial temporal cortex, orbital and polar frontal cortex, hippocampus. Difference of short and long duration stimuli: Anterior cingulate and medial prefrontal cortex, ventral stream visual cortex, dorsal stream visual cortex, early visual cortex. Conclusions: The current study elicited multiple brain activation differences for the initial, acute high-dose cannabis vs. placebo condition, but only premotor cortex region survived as significant following multiple comparison correction for short and long duration stimuli contrast. A post hoc power analysis showed that adding 10 additional subjects to this sample would achieve significance with multiple comparison correction for medium effect sizes at alpha=0.05. Future studies on a larger sample can help identify such significant activation differences, and examining all doses and tasks would elucidate unfolding of effects longitudinally post-dose, and dose-dependence of effects.
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Grigoroiu, Carmen, Wesselly Teodora, Raluca anca Pelin, and Adriandaniel Pricop. "THE EVALUATION OF THE COMPLEX REACTION TIME AT THE UPPER LIMBS LEVEL OF STUDENTS IN TECHNICAL HIGHER EDUCATION BY UTILIZING COMPUTERIZED TESTING." In eLSE 2018. Carol I National Defence University Publishing House, 2018. http://dx.doi.org/10.12753/2066-026x-18-180.
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Knowing the reaction time and the visual motor coordination is one of the acute and current requirements in the technical professions. In the field of engineering, the speed of adjusting the response to the stimulus is very important. The study aims at identifying the values of the complex reaction time, visual stimuli, for the upper limbs, in 18-20-year-old students from the U.P.B.. The testing took place in the U.P.B. Sports Complex between October and November 2017. A group of 124 students, consisting of 62 girls and 62 boys, was investigated. The evaluation of the subjects was performed by means of two computerized tests, which aimed at identifying the following upper limb parameters: the complex reaction time of the dominant hand and the complex reaction time of the non-dominant hand. The data obtained was processed by means of the TReactionCo software, which allowed recording and storing the reaction times for each execution, displaying the arithmetic mean, the maximum value, respectively the minimum one for a series of determinations. In the study we aimed to identify through the statistical and mathematical method, whether there are significant differences between the results obtained by the students (between male subjects and the female subjects) and between their dominant and non-dominant hand. The comparative analysis of the results for the complex reaction time test reveals a statistically significant difference between male and female subjects both for the dominant and non-dominant hand (P <0.001). The results obtained by the male subjects (M = 441.46 ms the dominant hand, M = 452.22 ms the non-dominant hand) were superior to those obtained by the female subjects (M = 497.46 ms the dominant hand, M = 511.70 ms the non-dominant hand).We believe that the results obtained from the study can contribute to the efficiency and modeling of the physical education and sports lessons in higher education in accordance with the requirements according to which the future technical specialist will work.
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Maitra, E. K., M. F. Al Dushaishi, J. Sugiura, and S. Jones. "Experimental Visualization of Downhole Drilling Vibration Using Industrial Drilling Dynamic Recorder." In International Petroleum Technology Conference. IPTC, 2024. http://dx.doi.org/10.2523/iptc-23494-ms.
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Abstract Housing miniature sensors within bottomhole assemblies (BHA) have proven to provide crucial real-time and valuable post-well analysis for drilling dynamics optimization and vibration mitigation. The downhole dynamic behavior of the BHA is often misinterpreted and requires special data preprocessing for effective optimization. The objective of this work is to establish an understanding and standardization of downhole vibration data analysis using a scaled laboratory BHA equipped with a high frequency industrial drilling dynamic (DD) field sensor and trajectory mapping station. A novel downscaled test assembly adhering to the geometric and material property relations of a field-size BHA section was designed and manufactured to investigate the nature of lateral vibrations. Axial excitation, i.e., weight on bit (WOB) fluctuation, and rotation were induced respectively using an electromagnetic shaker and an electric motor. A downhole drilling dynamic recorder was housed near the bit-end. BHA trajectory was mapped using inductive displacement sensors at multiple locations, along its length, to test the capability and accuracy of the DD field recorder. The wellbore structure was built with transparent material for direct visual correlation between the BHA movement and the drilling dynamic recorder. The results from this experiment provide precise and insightful visual information for the BHA movement correlation with the dynamic data acquired from a continuous high-frequency downhole field sensor. Real-time induced axial WOB fluctuation was recorded using a high-frequency drilling dynamic recorder and the induced axial force was distinctly addressed with the level of magnitude and frequency. The BHA vibration behavior of high-frequency accelerations, critical lateral vibration phenomena such as whirling motion, angular velocity (RPM) responses, and vibration behavior shift at the harmonic frequencies were characterized in relation to both the nature of induced forces at the bit and the acquired downhole field sensor data. The novel experiment establishes both quantitative and qualitative relations between DD data and physical vibration behavior during drilling. The experimental results showed the benefit of drilling dynamic recorders and it is accurate in predicting severe lateral vibrations while for the first time providing visual representation to aid in vibration data interpretation.
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Pham, Raphael, Helge Holzmann, Kurt Schneider, and Christian Bruggemann. "Beyond plain video recording of GUI tests: Linking test case instructions with visual response documentation." In 2012 7th International Workshop on Automation of Software Test (AST). IEEE, 2012. http://dx.doi.org/10.1109/iwast.2012.6228977.
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Williams, T. David. "Visual Field Area Response to Increased Target Intensity as a Method of Detecting Ocular Disease." In Noninvasive Assessment of Visual Function. Optica Publishing Group, 1985. http://dx.doi.org/10.1364/navf.1985.tub7.
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Greenstein, Vivienne C., and Donald C. Hood. "A Test of the Decreased Responsiveness Hypothesis in Retinitis Pigmentosa." In Noninvasive Assessment of Visual Function. Optica Publishing Group, 1985. http://dx.doi.org/10.1364/navf.1985.tua2.
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The most fundamental deficit attributable to retinal disease is a reduction in sensitivity to light. Recently we suggested a simple physiological basis for this sensitivity loss (Hood and Greenstein, 1982, Greenstein et al., 1982.). Based upon psychophysical experiments performed on patients with a variety of retinal diseases we hypothesized that in the diseased retina all retinal cells are less responsive to light. That is because of anoxia, or decreased metabolic activity, or some other factor, retinal cells respond to all light intensities with a fraction of the response produced in a non-diseased retina. In fact, much of our data suggest that a simple form of this explanation can be applied to the retinal diseases we studied. It is not surprising that decreased cellular responsiveness occurs in a disease like diabetic retinopathy; it is surprising that the loss in foveal sensitivity found in a group of patients with retinitis pigmentosa (RP) was consistent with this explanation (Greenstein et al. 1984). If sensitivity loss in RP can be attributed entirely to decreased responsiveness then the effects of adding adapting lights are quantitatively predictable. In this paper this hypothesis is tested by collecting foveal data at two levels of steady adaptation on a selected group of RP patients.
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Breton, Michael E., Dorothy E. Fletcher, and Theodore Krupin. "Clinical Use of the 100-Hue Test: Learning Artifact." In Noninvasive Assessment of the Visual System. Optica Publishing Group, 1987. http://dx.doi.org/10.1364/navs.1987.wa3.
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The Farnsworth-Munsell 100-Hue color test has been used extensively in studying the effects of many types of ocular pathology on the performance of the color mediating mechanisms. Many recent reports show that color discrimination performance as measured by the 100-Hue test is affected early in primary open angle glaucoma (POAG) as well as other optic nerve and retinal disorders. These studies typically demonstrate statistical significance of the effect of the disease process on color vision for pooled data from well defined patient and normal control groups. However, clinical usefulness of color test procedures depends upon the successful application on a prognostic basis of the group results to individual patients at risk. In this context we have identified a learning artifact associated with current routine use of the 100-Hue test which complicates the interpretation of repeat tests in following disease progression and which interferes with test protocols that require repetitive testing at one or more sessions such as occurs with the measurement of intensity-response functions.
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Zhongying Wang, Zunyi Deng, Xin Li, and Yueying Zhang. "A test system of mechanical properties of bar type ultrasonic motor based on transient response method." In 2011 2nd International Conference on Artificial Intelligence, Management Science and Electronic Commerce (AIMSEC). IEEE, 2011. http://dx.doi.org/10.1109/aimsec.2011.6009968.
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Fluet, M.-C., O. Lambercy, and R. Gassert. "Effects of 2D/3D visual feedback and visuomotor collocation on motor performance in a Virtual Peg Insertion Test." In 2012 34th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). IEEE, 2012. http://dx.doi.org/10.1109/embc.2012.6347035.
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Apps, Christopher, and Tyler Johnson. PR244-173902-R01 On-water Leak Detection System Evaluation. Pipeline Research Council International, Inc. (PRCI), 2018. http://dx.doi.org/10.55274/r0011504.
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The hydrocarbon industry is directing efforts towards reducing the environmental impact of operation through improving pipeline performance and addressing evolving regulatory requirements. As a result, many different external leak detection technologies have been recently developed; however, it is challenging to test these systems with real hydrocarbon products. The research project described herein evaluated the performance of six external leak detection systems intended to identify the presence of hydrocarbon products on the surface of water. The scope was limited to an idealized freshwater environment. Tests were conducted with five hydrocarbon test fluids (gasoline, diesel, Synthetic Sweet Blend, Access Western Blend and Cold Lake Blend) along with three additional test fluids (canola oil, salt water and motor oil). Canola oil was considered as a candidate surrogate fluid and salt water as a possible source of false alarms, while motor oil was considered as a candidate surrogate fluid or a false alarm trigger, depending on the field application. Testing was performed by releasing each test fluid onto the surface of a water basin with six sensors located equidistant from the release point. Each sensor's response to contact with the test fluid was monitored and compared based on time to detection and estimated slick thickness at detection.
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Martinez, Kimberly D., and Gaojian Huang. Exploring the Effects of Meaningful Tactile Display on Perception and Preference in Automated Vehicles. Mineta Transportation Institute, 2022. http://dx.doi.org/10.31979/mti.2022.2164.
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There is an existing issue in human-machine interaction, such that drivers of semi-autonomous vehicles are still required to take over control of the vehicle during system limitations. A possible solution may lie in tactile displays, which can present status, direction, and position information while avoiding sensory (e.g., visual and auditory) channels overload to reliably help drivers make timely decisions and execute actions to successfully take over. However, limited work has investigated the effects of meaningful tactile signals on takeover performance. This study synthesizes literature investigating the effects of tactile displays on takeover performance in automated vehicles and conducts a human-subject study to design and test the effects of six meaningful tactile signal types and two pattern durations on drivers’ perception and performance during automated driving. The research team performed a literature review of 18 articles that conducted human-subjects experiments on takeover performance utilizing tactile displays as takeover requests. Takeover performance in these studies were highlighted, such as response times, workload, and accuracy. The team then conducted a human-subject experiment, which included 16 participants that used a driving simulator to present 30 meaningful vibrotactile signals, randomly across four driving sessions measuring for reaction times (RTs), interpretation accuracy, and subjective ratings. Results from the literature suggest that tactile displays can present meaningful vibrotactile patterns via various in-vehicle locations to help improve drivers’ performance during the takeover and can be used to assist in the design of human-machine interfaces (HMI) for automated vehicles. The experiment yielded results illustrating higher urgency patterns were associated with shorter RTs and higher intuitive ratings. Also, pedestrian status and headway reduction signals presented shorter RTs and increased confidence ratings compared to other tactile signal types. Finally, the signal types that yielded the highest accuracy were the surrounding vehicle and navigation signal types. Implications of these findings may lie in informing the design of next-generation in-vehicle HMIs and future human factors studies on human-automation interactions.
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Stakes, Keith, and Joseph Willi. Study of the Fire Service Training Environment: Safety, Fidelity, and Exposure -- Acquired Structures. UL Firefighter Safety Research Institute, 2019. http://dx.doi.org/10.54206/102376/ceci9490.
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Previous FSRI led research projects have focused on examining the fire environment with regards to current building construction methods, synthetic fuel loading, and best-practices in firefighting strategies and tactics. More than 50 experiments have been previously conducted utilizing furniture to produce vent-limited fire conditions, replicating the residential fire environment, and studying the methods of horizontal ventilation, vertical ventilation, and positive pressure attack. Tactical considerations generated from the research are intended to provide fire departments with information to evaluate their standard operating procedures and make improvements, if necessary, to increase the safety and effectiveness of firefighting crews. Unfortunately, there still exists a long standing disconnect between live-fire training and the fireground as evident by continued line of duty injury and death investigations that point directly to a lack of realistic yet safe training, which highlights a continued misunderstanding of fire dynamics within structures. The main objective of the Study of the Fire Service Training Environment: Safety, Fidelity, and Exposure is to evaluate training methods and fuel packages in several different structures commonly used across the fire service to provide and highlight considerations to increase both safety and fidelity. This report is focused on the evaluation of live-fire training in acquired structures. A full scale structure was constructed using a similar floor plan as in the research projects for horizontal ventilation, vertical ventilation, and positive pressure attack to provide a comparison between the modern fire environment and the training ground. The structure was instrumented which allowed for the quantification of fire behavior, the impact of various ventilation tactics, and provided the ability to directly compare these experiments with the previous research. Twelve full scale fire experiments were conducted within the test structure using two common training fuel packages: 1) pallets, and 2) pallets and oriented strand board (OSB). To compare the training fuels to modern furnishings, the experiments conducted were designed to replicate both fire and ventilation location as well as event timing to the previous research. Horizontal ventilation, vertical ventilation, and positive pressure attack methods were tested, examining the proximity of the vent location to the fire (near vs. far). Each ventilation configuration in this series was tested twice with one of the two training fuel loads. The quantification of the differences between modern furnishings and wood-based training fuel loads and the impact of different ventilation tactics is documented through a detailed comparison to the tactical fireground considerations from the previous research studies. The experiments were compared to identify how the type of fuel used in acquired structures impacts the safety and fidelity of live-fire training. The comparisons in this report characterized initial fire growth, the propensity for the fire to become ventilation limited, the fires response to ventilation, and peak thermal exposure to students and instructors. Comparisons examined components of both functional and physical fidelity. Video footage was used to assess the visual cues, a component of the fire environment that is often difficult to replicate in training due to fuel load restrictions. The thermal environment within the structure was compared between fuel packages with regards to the potential tenability for both students and instructors.
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FEASIBILITY STUDY ON AN OPTICAL STRAIN GAGE BASED ON FLUORESCENCE RESPONSE OF GRAPHENE QUANTUM DOTS. The Hong Kong Institute of Steel Construction, 2024. http://dx.doi.org/10.18057/ijasc.2024.20.2.5.
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In this study, based on the excellent fluorescence properties of graphene quantum dots (GQDs) and their good response to mechanical effects, the GQDs were mixed with epoxy resin to make a coating sensor. Taking this as the research object, the film was coated on the Q235 tensile steel sample, which can dynamically monitor the stress and strain of the steel sample. By investigating the effects of the concentration of the GQDs solution, the synchronization of the film and the steel component, and the residual stress of the epoxy resin, the mechanism of the visual fluorescence signal was analyzed. The response of stress-strain of steel sample and the fluorescence intensity of coating sensor under uniaxial tension and cyclic loading were studied. The test results showed that the synthesized coating sensor had good stability and can produce very sensitive fluorescence response to the stress and strain. The fluorescence intensity of the coating sensor increased with the increase of stress and strain, and decreased with the decrease of stress and strain under cyclic loading, which had the potential to act as a new optical strain gauge. Based on the test results, the stress and strain of the GQDs-epoxy resin composites coated on tensile steel samples with different thicknesses were studied by numerical simulation.