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Relevant bibliographies by topics / Psychophysical Investigation

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Academic literature on the topic 'Psychophysical Investigation'

Author: Grafiati

Published: 4 June 2021

Last updated: 20 February 2023

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Journal articles on the topic "Psychophysical Investigation"

1

Seaber, Judy. "Psychophysical Investigation of Binocular Vision." American Orthoptic Journal 39, no. 1 (January 1989): 62–73. http://dx.doi.org/10.1080/0065955x.1989.11981936.

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Pinna, Baingio. "What Comes Before Psychophysics? The Problem of 'What We Perceive' and the Phenomenological Exploration of New Effects." Seeing and Perceiving 23, no. 5 (2010): 463–81. http://dx.doi.org/10.1163/187847510x541144.

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AbstractThe psychophysical methods were developed by Fechner to find out the perceptual threshold of a stimulus, that is, the weakest stimulus that could be perceived. In spite of the strong efficiency in measuring thresholds, psychophysics does not help to define the multiplicity and complexity of possible percepts emerging from the same stimulus conditions, and accordingly, of what we perceive. In order to define what we perceive it is also necessary to define what we can perceive within the multiplicity of possible visual outcomes and how they are reciprocally organized. Usually the main experimental task is aimed at focusing on the specific attribute to be measured: what comes before psychophysics, i.e., the phenomenological exploration, is typically not fully investigated either epistemologically or phenomenally, even if it assumes a basic role in the process of scientific discovery. In this work, the importance of the traditional approach is not denied. Our main purpose is to place the two approaches side by side so that they complement each other: the phenomenological exploration complements the quantitative psychophysical measurement of the qualities that emerge through the preliminary exploration. To demonstrate the basic role played by the phenomenological exploration in complementing the psychophysical investigation we introduce three critical visual conditions, called visual gradient of perceptibility, perceptible invisibility and visual levels of perceptibility. Through these conditions several new illusions are studied and some phenomenological rules are suggested.

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Graaf, Cees De, and Jan E. R. Frijters. "A psychophysical investigation of Beidler's mixture equation." Chemical Senses 11, no. 3 (1986): 295–314. http://dx.doi.org/10.1093/chemse/11.3.295.

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Kumar, T., and D. A. Glaser. "Illusory motion in Enigma: A psychophysical investigation." Proceedings of the National Academy of Sciences 103, no. 6 (January 30, 2006): 1947–52. http://dx.doi.org/10.1073/pnas.0510236103.

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Spence, Charles, Deborah E. Bentley, Nicola Phillips, Francis P. McGlone, and Anthony K. P. Jones. "Selective attention to pain: a psychophysical investigation." Experimental Brain Research 145, no. 3 (June 14, 2002): 395–402. http://dx.doi.org/10.1007/s00221-002-1133-6.

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Hirahara, Tatsuya, and Kazuo Ueda. "Investigation of headphones suitable for psychophysical experiments." Journal of the Acoustical Society of America 87, S1 (May 1990): S142. http://dx.doi.org/10.1121/1.2027992.

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Keast, R. S. J. "A Psychophysical Investigation of Binary Bitter-compound Interactions." Chemical Senses 28, no. 4 (May 1, 2003): 301–13. http://dx.doi.org/10.1093/chemse/28.4.301.

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Grunfeld, E. A., A. B. Morland, A. M. Bronstein, and M. A. Gresty. "Adaptation to oscillopsia: A psychophysical and questionnaire investigation." Brain 123, no. 2 (February 1, 2000): 277–90. http://dx.doi.org/10.1093/brain/123.2.277.

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9

Balkwill, Laura-Lee, and William Forde Thompson. "A Cross-Cultural Investigation of the Perception of Emotion in Music: Psychophysical and Cultural Cues." Music Perception 17, no. 1 (1999): 43–64. http://dx.doi.org/10.2307/40285811.

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Studies of the link between music and emotion have primarily focused on listeners' sensitivity to emotion in the music of their own culture. This sensitivity may reflect listeners' enculturation to the conventions of their culture's tonal system. However, it may also reflect responses to psychophysical dimensions of sound that are independent of musical experience. A model of listeners' perception of emotion in music is proposed in which emotion in music is communicated through a combination of universal and cultural cues. Listeners may rely on either of these cues, or both, to arrive at an understanding of musically expressed emotion. The current study addressed the hypotheses derived from this model using a cross-cultural approach. The following questions were investigated: Can people identify the intended emotion in music from an unfamiliar tonal system? If they can, is their sensitivity to intended emotions associated with perceived changes in psychophysical dimensions of music? Thirty Western listeners rated the degree of joy, sadness, anger, and peace in 12 Hindustani raga excerpts (field recordings obtained in North India). In accordance with the raga-rasa system, each excerpt was intended to convey one of the four moods or "rasas" that corresponded to the four emotions rated by listeners. Listeners also provided ratings of four psychophysical variables: tempo, rhythmic complexity, melodic complexity, and pitch range. Listeners were sensitive to the intended emotion in ragas when that emotion was joy, sadness, or anger. Judgments of emotion were significantly related to judgments of psychophysical dimensions, and, in some cases, to instrument timbre. The findings suggest that listeners are sensitive to musically expressed emotion in an unfamiliar tonal system, and that this sensitivity is facilitated by psychophysical cues.

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Jansen, Yvonne, and Kasper Hornbaek. "A Psychophysical Investigation of Size as a Physical Variable." IEEE Transactions on Visualization and Computer Graphics 22, no. 1 (January 31, 2016): 479–88. http://dx.doi.org/10.1109/tvcg.2015.2467951.

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Dissertations / Theses on the topic "Psychophysical Investigation"

1

Chambers, Christopher D. (Christopher David) 1977. "A psychophysical investigation of the octave illusion." Monash University, Dept. of Psychology, 2002. http://arrow.monash.edu.au/hdl/1959.1/8303.

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2

Best, Virginia Ann. "Spatial Hearing with Simultaneous Sound Sources: A Psychophysical Investigation." Thesis, The University of Sydney, 2004. http://hdl.handle.net/2123/576.

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This thesis provides an overview of work conducted to investigate human spatial hearing in situations involving multiple concurrent sound sources. Much is known about spatial hearing with single sound sources, including the acoustic cues to source location and the accuracy of localisation under different conditions. However, more recently interest has grown in the behaviour of listeners in more complex environments. Concurrent sound sources pose a particularly difficult problem for the auditory system, as their identities and locations must be extracted from a common set of sensory receptors and shared computational machinery. It is clear that humans have a rich perception of their auditory world, but just how concurrent sounds are processed, and how accurately, are issues that are poorly understood. This work attempts to fill a gap in our understanding by systematically examining spatial resolution with multiple sound sources. A series of psychophysical experiments was conducted on listeners with normal hearing to measure performance in spatial localisation and discrimination tasks involving more than one source. The general approach was to present sources that overlapped in both frequency and time in order to observe performance in the most challenging of situations. Furthermore, the role of two primary sets of location cues in concurrent source listening was probed by examining performance in different spatial dimensions. The binaural cues arise due to the separation of the two ears, and provide information about the lateral position of sound sources. The spectral cues result from location-dependent filtering by the head and pinnae, and allow vertical and front-rear auditory discrimination. Two sets of experiments are described that employed relatively simple broadband noise stimuli. In the first of these, two-point discrimination thresholds were measured using simultaneous noise bursts. It was found that the pair could be resolved only if a binaural difference was present; spectral cues did not appear to be sufficient. In the second set of experiments, the two stimuli were made distinguishable on the basis of their temporal envelopes, and the localisation of a designated target source was directly examined. Remarkably robust localisation was observed, despite the simultaneous masker, and both binaural and spectral cues appeared to be of use in this case. Small but persistent errors were observed, which in the lateral dimension represented a systematic shift away from the location of the masker. The errors can be explained by interference in the processing of the different location cues. Overall these experiments demonstrated that the spatial perception of concurrent sound sources is highly dependent on stimulus characteristics and configurations. This suggests that the underlying spatial representations are limited by the accuracy with which acoustic spatial cues can be extracted from a mixed signal. Three sets of experiments are then described that examined spatial performance with speech, a complex natural sound. The first measured how well speech is localised in isolation. This work demonstrated that speech contains high-frequency energy that is essential for accurate three-dimensional localisation. In the second set of experiments, spatial resolution for concurrent monosyllabic words was examined using similar approaches to those used for the concurrent noise experiments. It was found that resolution for concurrent speech stimuli was similar to resolution for concurrent noise stimuli. Importantly, listeners were limited in their ability to concurrently process the location-dependent spectral cues associated with two brief speech sources. In the final set of experiments, the role of spatial hearing was examined in a more relevant setting containing concurrent streams of sentence speech. It has long been known that binaural differences can aid segregation and enhance selective attention in such situations. The results presented here confirmed this finding and extended it to show that the spectral cues associated with different locations can also contribute. As a whole, this work provides an in-depth examination of spatial performance in concurrent source situations and delineates some of the limitations of this process. In general, spatial accuracy with concurrent sources is poorer than with single sound sources, as both binaural and spectral cues are subject to interference. Nonetheless, binaural cues are quite robust for representing concurrent source locations, and spectral cues can enhance spatial listening in many situations. The findings also highlight the intricate relationship that exists between spatial hearing, auditory object processing, and the allocation of attention in complex environments.

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3

Seton, John Christopher. "A psychophysical investigation of auditory rhythmic beat perception." Thesis, University of York, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329671.

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Lee, Suzanne E. "An investigation of team lifting using psychophysical methods." Thesis, Virginia Tech, 1995. http://hdl.handle.net/10919/42550.

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Lifting is one of the major causes of back injury in the workplace. Often, workers are told to ask for the help of another worker when the load is too great to be lifted alone, yet the effects of these team lifts have not been researched until recently. This experiment investigated some of the variables which may affect the results of team lifting tasks. The psychophysical methodology has been used for almost 30 years in trying to determine the maximum acceptable weight of lift for industrial workers. Though two previous studies of team lifting used the psychophysical approach, no effort was made to identify and control variables which may affect team tasks. This experiment manipulated two variables, box type (double or single) and isolation condition (curtains open or closed) to see whether these would produce the psychosocial effects of social loafing and social facilitation. Three male and three female two-person teams performed team lifts, using psychophysical methodology, under all four conditions. The only significant effect found was for gender. Female teams lifted 58.8% of the mass the male teams lifted. Male teams lifted 92.5% and female teams 87.8% of the sum of their individual lifts. This is in close agreement with other studies of team lifting. A regression model was developed in order to predict the amount of weight a team can lift, with an R₂ of 0.962. The external validity of the task conditions was also investigated.
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Lee, Suzanne Elin. "An investigation of team lifting using psychophysical methods /." This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-05092009-040526/.

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Morioka, Miyuki. "Psychophysical investigation of the perception of hand-transmitted vibration." Thesis, University of Southampton, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.484260.

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Doney, A. C. F. "A psychophysical investigation of the visual motion processing system." Thesis, University of York, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372774.

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8

Roff, Emma J. "Topographic, haemodynamic and psychophysical investigation of glaucomatous optic neuropathy." Thesis, Aston University, 1999. http://publications.aston.ac.uk/14554/.

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Loss of optic nerve head (ONH) axons in primary open angle glaucoma (POAG) has been attributed to both mechanical and vascular factors. Confocal scanning laser ophthalmoscopy (cSLO) provides a promising tool for the topographic follow-up of the ONH in glaucoma, while scanning laser Doppler flowmetry (SLDF) facilitates the rapid non-invasive assessment of retinal capillary blood flow. The purposes of these investigations were to optimise the techniques and explore their potential to classify and monitor disease. Preliminary investigations explored the reproducibility and validity of cSLO and SLDF and showed that: For cSLO: In a model eye, measurements are accurate over a range of axial lengths. For best reproducibility, seven images per visit are required, with a contour line located on Elschnig's scleral ring and transferred automatically between images. For SLDF: Three perfusion images are required for optimum reproducibility. Physiological changes induced by gas perturbation can be measured. Cross-sectional comparison of groups of normal subjects and early POAG patients showed that: cSLO parameters differentiate the early POAG group. Blood volume measured by SLDF showed group differences in superior nasal retina only. Longitudinal investigation of ONH topography, haemodynamic and visual field indices in normal subjects and POAG patients showed that: cSLO detects topographical change over time more frequently in the POAG group. Important parameters include: C:D area ratio, cup and rim area, mean depth in contour, volumes above and below reference and surface. Factor analysis identified "cup" and "rim" factors that can be used to detect change over time in individual patients. Blood flow changes were most apparent in the inferior nasal peripapillary retina of the POAG group. Perimetry is of clinical value for the identification of glaucoma but is less sensitive than cSLO for monitoring glaucomatous change.

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9

Best, Virginia Ann. "Spatial Hearing with Simultaneous Sound Sources: A Psychophysical Investigation." University of Sydney. Medicine, 2004. http://hdl.handle.net/2123/576.

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This thesis provides an overview of work conducted to investigate human spatial hearing in situations involving multiple concurrent sound sources. Much is known about spatial hearing with single sound sources, including the acoustic cues to source location and the accuracy of localisation under different conditions. However, more recently interest has grown in the behaviour of listeners in more complex environments. Concurrent sound sources pose a particularly difficult problem for the auditory system, as their identities and locations must be extracted from a common set of sensory receptors and shared computational machinery. It is clear that humans have a rich perception of their auditory world, but just how concurrent sounds are processed, and how accurately, are issues that are poorly understood. This work attempts to fill a gap in our understanding by systematically examining spatial resolution with multiple sound sources. A series of psychophysical experiments was conducted on listeners with normal hearing to measure performance in spatial localisation and discrimination tasks involving more than one source. The general approach was to present sources that overlapped in both frequency and time in order to observe performance in the most challenging of situations. Furthermore, the role of two primary sets of location cues in concurrent source listening was probed by examining performance in different spatial dimensions. The binaural cues arise due to the separation of the two ears, and provide information about the lateral position of sound sources. The spectral cues result from location-dependent filtering by the head and pinnae, and allow vertical and front-rear auditory discrimination. Two sets of experiments are described that employed relatively simple broadband noise stimuli. In the first of these, two-point discrimination thresholds were measured using simultaneous noise bursts. It was found that the pair could be resolved only if a binaural difference was present; spectral cues did not appear to be sufficient. In the second set of experiments, the two stimuli were made distinguishable on the basis of their temporal envelopes, and the localisation of a designated target source was directly examined. Remarkably robust localisation was observed, despite the simultaneous masker, and both binaural and spectral cues appeared to be of use in this case. Small but persistent errors were observed, which in the lateral dimension represented a systematic shift away from the location of the masker. The errors can be explained by interference in the processing of the different location cues. Overall these experiments demonstrated that the spatial perception of concurrent sound sources is highly dependent on stimulus characteristics and configurations. This suggests that the underlying spatial representations are limited by the accuracy with which acoustic spatial cues can be extracted from a mixed signal. Three sets of experiments are then described that examined spatial performance with speech, a complex natural sound. The first measured how well speech is localised in isolation. This work demonstrated that speech contains high-frequency energy that is essential for accurate three-dimensional localisation. In the second set of experiments, spatial resolution for concurrent monosyllabic words was examined using similar approaches to those used for the concurrent noise experiments. It was found that resolution for concurrent speech stimuli was similar to resolution for concurrent noise stimuli. Importantly, listeners were limited in their ability to concurrently process the location-dependent spectral cues associated with two brief speech sources. In the final set of experiments, the role of spatial hearing was examined in a more relevant setting containing concurrent streams of sentence speech. It has long been known that binaural differences can aid segregation and enhance selective attention in such situations. The results presented here confirmed this finding and extended it to show that the spectral cues associated with different locations can also contribute. As a whole, this work provides an in-depth examination of spatial performance in concurrent source situations and delineates some of the limitations of this process. In general, spatial accuracy with concurrent sources is poorer than with single sound sources, as both binaural and spectral cues are subject to interference. Nonetheless, binaural cues are quite robust for representing concurrent source locations, and spectral cues can enhance spatial listening in many situations. The findings also highlight the intricate relationship that exists between spatial hearing, auditory object processing, and the allocation of attention in complex environments.

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10

Morris, Eilon. "VIA RHYTMÓS : an investigation of rhythm in psychophysical actor training." Thesis, University of Huddersfield, 2013. http://eprints.hud.ac.uk/id/eprint/17541/.

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This thesis investigates the significance of rhythm to the actor, examining the ways it is approached, understood and embodied within a range of training practices. In what ways does rhythm facilitate and transform the practices of individual performers and ensembles, affecting their use of attention, physical coordination, qualities of connectivity, states of consciousness and emotions? The psychophysical mechanisms through which rhythm informs these key aspects of actor training are analysed here via a range of contemporary and historical psychophysical and cultural frameworks. Drawing on this body of research this thesis argues the case for a greater understanding of the pedagogy of rhythm within actor training, indicating a number of areas for further investigation and potential developments within this field. Beginning with Stanislavski’s use of “Tempo-rhythm” and progressing through the practices of Meyerhold and Grotowski, a number of key rhythmic principles will be discussed. This will lead on to a series of case studies on the contemporary training practices of John Britton, Nicolás Núñez, and Reinhard Flatischler. Following this will be an examination of simultaneity in acting practices and an analysis of the author’s own practical research into the use of polyrhythm as a tool for cultivating modes of simultaneous attention and action in actor training.

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Books on the topic "Psychophysical Investigation"

1

Russell, M. H. A. Visual evoked potential and psychophysical investigation of chromatic and achromatic visual function in humans; applications in the investigation of multiple sclerosis and. Manchester: UMIST, 1991.

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Latham, Keziah Jane Cameron. Psychophysical investigations of human peripheral vision. Birmingham: Aston University. Departmentof Vision Sciences, 1995.

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Ripamonti, Caterina. Computational and psychophysical investigations of perceptual transparency. [Derby: University of Derby], 2002.

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4

Morris, Crystlette Beth. A psychophysical and perceptual investigation of the octave illusion. 1988.

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Bruno, Nicola. The Three-Dimensional Necker Cube. Oxford University Press, 2017. http://dx.doi.org/10.1093/acprof:oso/9780199794607.003.0114.

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The Necker cube is a widely known example of a reversible figure. Perceptual reversals were first observed in engravings of crystals by the Swiss geologist Louis Albert Necker in 1832. Although Necker’s engravings were not exactly of regular cubes, the figure as it is used now can be perceived in two alternative arrangements of a three-dimensional (3D) cube. Although less widely known than the popular two-dimensional version, the 3D Necker cube is a surprisingly rich model for psychophysical investigation. This chapter summarizes relevant main results and their implications for diverse theoretical issues such as the definition of visual illusions, the role of global three-dimensional interpretations in the integration of local sensory signals, and the exploratory and multisensory nature of perceptual processes.

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van Dijck, Jean-Philippe, Véronique Ginsburg, Luisa Girelli, and Wim Gevers. Linking Numbers to Space. Edited by Roi Cohen Kadosh and Ann Dowker. Oxford University Press, 2014. http://dx.doi.org/10.1093/oxfordhb/9780199642342.013.020.

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Several psychophysical and neuropsychological investigations suggest that the processing of number and spatial information is strongly associated. A popular account argues that this association has its origin in the underlying mental representation of numbers taking the form of a horizontally-orientated mental number line, which is isomorphic to the representation of physical lines. Recently, however, several alternative explanations have been put forward. We describe those theories and argue that no current account is on itself able to explain the full range of observations. To do this, a hybrid account is proposed which takes into account the underlying representation, but emphasizes the processing mechanisms required by the task at hand.

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Book chapters on the topic "Psychophysical Investigation"

1

McNamara, Ann, Alan Chalmers, Tom Troscianko, and Erik Reinhard. "Fidelity of Graphics Reconstructions: A Psychophysical Investigation." In Rendering Techniques ’98, 237–46. Vienna: Springer Vienna, 1998. http://dx.doi.org/10.1007/978-3-7091-6453-2_22.

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Bharti, Jaya, and Megha Singh. "Perception of Construction Workers on Psychophysical Health and Safety Issues: A Qualitative Investigation." In Ecological and Health Effects of Building Materials, 451–65. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-76073-1_24.

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Dahlke, Grzegorz, Milena Drzewiecka, Marcin Butlewski, and Leszek Pacholski. "A Multi-Criterial Hardware Assessment of the Psychophysical Capacity of Workers in the Investigation of Fatigue." In Advances in Intelligent Systems and Computing, 25–34. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-41688-5_3.

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Brintzenhofe, Kurt T. "Social Psychology and Psychophysics." In Investigating Human Interaction through Mathematical Analysis, 4–25. New York: Routledge, 2023. http://dx.doi.org/10.4324/9781003325161-2.

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Schuetz, Immo, Meaghan McManus, Katja Fiehler, and Dimitris Voudouris. "Investigating Movement-Related Tactile Suppression Using Commercial VR Controllers." In Haptics: Science, Technology, Applications, 225–33. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-06249-0_26.

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AbstractWhen we perform a goal-directed movement, tactile sensitivity on the moving limb is reduced compared to during rest. This well established finding of movement-related tactile suppression is often investigated with psychophysical paradigms, using custom haptic actuators and highly constrained movement tasks. However, studying more naturalistic movement scenarios is becoming more accessible due to increased availability of affordable, off-the-shelf virtual reality (VR) hardware. Here, we present a first evaluation of consumer VR controllers (HTC Vive and Valve Index) for psychophysical testing using the built-in vibrotactile actuators. We show that participants’ tactile perceptual thresholds can generally be estimated through manipulation of controller vibration amplitude and frequency. When participants performed a goal-directed movement using the controller, vibrotactile perceptual thresholds increased compared to rest, in agreement with previous work and confirming the suitability of unmodified VR controllers for tactile suppression research. Our findings will facilitate investigations of tactile perception in dynamic virtual scenarios.

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Harris, Justin A. "Psychophysical Investigations into Cortical Encoding of Vibrotactile Stimuli." In Percept, Decision, Action: Bridging the Gaps, 238–50. Chichester, UK: John Wiley & Sons, Ltd, 2008. http://dx.doi.org/10.1002/9780470034989.ch19.

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Mehler, Jacques, and Juan Segui. "English and French Speech Processing: Some Psycholinguistic Investigations." In The Psychophysics of Speech Perception, 405–18. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3629-4_33.

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Peterson, Frederick, and C. G. Jung. "2. Psychophysical Investigations with the Galvanometer and Pneumograph in Normal and Insane Individuals." In Collected Works of C.G. Jung, Volume 2: Experimental Researches, 492–553. Princeton: Princeton University Press, 2014. http://dx.doi.org/10.1515/9781400850914.492.

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Bennett, Karen. "Why I Am Not a Dualist." In Oxford Studies in Philosophy of Mind Volume 1, 208–31. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780198845850.003.0008.

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cI argue that dualism does not help assuage the perceived explanatory failure of physicalism. I begin with the claim that a minimally plausible dualism should only postulate a small stock of fundamental phenomenal properties and fundamental psychophysical laws: it should systematize the teeming mess of phenomenal properties and psychophysical correlations. I then argue that it is dialectically odd to think that empirical investigation could not possibly reveal a physicalist explanation of consciousness, and yet can reveal this small stock of fundamental phenomenal properties and psychophysical laws. I go on to consider a couple of different forms the dualist’s laws could take, and argue that one version makes no progress on the hard problem of consciousness, and the other replaces the hard problem with a different problem that is just as hard.

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"Psychophysical Methods Applied to the Investigation of Sensory Properties in Foods." In Trends in Food Engineering, 65–76. CRC Press, 2000. http://dx.doi.org/10.1201/9781482279085-12.

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Conference papers on the topic "Psychophysical Investigation"

1

Greenlee, Mark W., Svein Magnussen, and Frans W. Cornelissen. "Psychophysical investigation of visual shortterm memory." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1993. http://dx.doi.org/10.1364/oam.1993.wj.3.

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Griesser, Rita T., Douglas W. Cunningham, Christian Wallraven, and Heinrich H. Bülthoff. "Psychophysical investigation of facial expressions using computer animated faces." In the 4th symposium. New York, New York, USA: ACM Press, 2007. http://dx.doi.org/10.1145/1272582.1272585.

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Rajaei, N., Y. Kawabe, M. Ohka, and T. Miyaoka. "An investigation of tactile illusion toward tactile displays using psychophysical experiments." In 2011 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM). IEEE, 2011. http://dx.doi.org/10.1109/aim.2011.6026985.

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Evans, Bruce J. W., N. Drasdo, and I. L. Richards. "Psychophysical Evidence for Anomalous Visual Processing in Dyslexic Children." In Noninvasive Assessment of the Visual System. Washington, D.C.: Optica Publishing Group, 1992. http://dx.doi.org/10.1364/navs.1992.ma2.

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Many factors have been associated with dyslexia, including visual anomalies (Evans and Drasdo, 1990) and subtle cortical pathology (Sherman et al., 1989). Recent research has suggested that up to 70% of reading disabled children may have a deficit of the transient visual system (Lovegrove et al., 1986). The transient/sustained distinction is likely to be an oversimplification (Kaplan et al., 1991); it has, however, withstood investigation reasonably well and its usefulness as an organising tool in dyslexia research seems to warrant further investigation at the present time.

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Rajaei, Nader, Yuji Kawabe, Abdullah Chami, Hanafiah Bin Yussof, Tetsu Miyaoka, and Masahiro Ohka. "Investigation on influence of tangential stimulation on velvet hand illusion using psychophysical experiment." In 2010 International Symposium on Micro-NanoMechatronics and Human Science (MHS). IEEE, 2010. http://dx.doi.org/10.1109/mhs.2010.5669538.

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Burns, Stephen A., Ann E. Elsner, Louis A. Lobes, and Bernard H. Doft. "Psychophysical Techniques for Investigating Cone Kinetics." In Noninvasive Assessment of Visual Function. Washington, D.C.: Optica Publishing Group, 1985. http://dx.doi.org/10.1364/navf.1985.tua1.

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We have developed two noninvasive techniques, steady-state color matching and dynamic color matching, to investigate abnormalities in cone photopigment kinetics. Color matching is a psychophysical technique that reveals photoreceptor properties. Since color matching depends on the spectral sensitivity of the photoreceptors, the color match shifts when the optical density of the cones changes1,2.

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Sutter, Anne, and Norma Graham. "Investigating the dynamics of texture segregation processing by using the speed-accuracy tradeoff method." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1992. http://dx.doi.org/10.1364/oam.1992.thmm2.

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Abstract:

We investigated the time course of texture segregation processes by using the method of cued response to obtain speed-accuracy tradeoff (SAT) functions for various psychophysical tasks and texture patterns. SAT functions were obtained by requiring subjects to respond within 200 or 300 ms after an auditory cue. The cue occurred from 0 to 750 ms after the onset of the pattern (which was 50 ms in duration). Response accuracy and reaction time were recorded. We employed several psychophysical tasks, such as discrimination between uniform texture fields and texture fields in which a rectangular patch of texture was embedded. We found that response accuracy, as a function of response signal delay, depended on the task. We also presented a variety of texture patterns, including some that have been used to investigate simple (first-order) versus complex (second-order) mechanisms. We found that the shape of the SAT function depended on the spatial characteristics of the texture patterns.

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8

Lederman, Susan J., Roberta L. Klatzky, Cheryl Hamilton, and Molly Grindley. "Perceiving Surface Roughness Through a Probe: Effects of Applied Force and Probe Diameter." In ASME 2000 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/imece2000-2413.

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Abstract The current paper constitutes a continuation of our psychophysical research on perceiving the surface roughness of raised-dot surfaces via a rigid probe. Here we investigated the perceptual consequences of varying applied force (Experiment 1) and probe diameter (Experiment 2). A passive-touch mode was used to effect contact between probe and surface. All psychophysical roughness functions were best fit by quadratic equations. Increasing force resulted in increased roughness estimates, without a corresponding shift in the peak position of the function along the interelement-spacing axis (Experiment 1). Perceived roughness decreased overall with increasing probe diameter for the narrower interelement spacings; however, perceived roughness increased overall with increasing probe diameter for the wider interelement spacings. This reversal was explained by a corresponding shift in the position of the peaks of the psychophysical functions toward the wider end of the interelement-spacing axis as probe diameter increased (Experiment 2). Implications for the design of haptic interfaces for virtual environments are also considered. In the last couple of years, we have been reporting the results of a comprehensive research program investigating how people perceive surface texture via a rigid probe. The initial and current stage of this research program involves conducting psychophysical experiments to determine a small number of critical parameters that will describe how vibration — induced by the interaction between surface and rigid probe, and passed to the skin — leads to an internal representation of surface roughness. In the second stage of this research program, we intend to develop a model that describes texture perception from a probe as the transition from mechanical interactions between probe tip and surface to perceptual responses. In the third stage of the program, we will use the vibration based model to create virtual textures with a haptic-interface by delivering vibratory forces to the fingertip. We begin by reviewing the psychophysical literature on perceiving roughness via the bare finger versus a rigid probe as intermediary.

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Chen, Zhiyu, Pengzhi Zou, Xinwei Wu, and Qiang Liu. "Interpretation of the psychophysical results on preferred CCT and Duv when investigating colour preference of lighting." In 2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS). IEEE, 2021. http://dx.doi.org/10.1109/sslchinaifws54608.2021.9675155.

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Mayer, Melanie J., Shari J. Spiegler, Charlene B. Y. Kim, Brian Ward, and Andrew Glues. "Foveal Flicker Sensitivity In Eyes at Risk for Age-Related Maculopathy." In Noninvasive Assessment of the Visual System. Washington, D.C.: Optica Publishing Group, 1990. http://dx.doi.org/10.1364/navs.1990.thb4.

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Several labs are investigating noninvasive measures of retinal function which predict onset of exudative age-related maculopathy (ARM).1,2,3,4 The goal is to identify those at risk so that laser photocoagulation is not delayed when symptoms first appear. Three psychophysical performances have been associated with development of ARM-- loss of absolute (dark adapted) foveal sensitivity to long wavelength light,1,2 loss of S-cone sensitivity,2 and change in color discrimination.4 We report here that flicker sensitivity to long-wavelength, low spatial frequency light is also affected in eyes at risk for ARM.

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Reports on the topic "Psychophysical Investigation"

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Cobo-Lewis, Alan B. A Psychophysical Investigation of Mechanisms Selective for the Spatial Frequency of Disparity Modulation in Random-Dot Stereograms. Fort Belvoir, VA: Defense Technical Information Center, January 1992. http://dx.doi.org/10.21236/ada342942.

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