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Bienek, AS, ME Gee, RP Nolan, J. Kaczorowski, NR Campbell, C. Bancej, F. Gwadry-Sridhar, C. Robitaille, RL Walker und S. Dai. „Methodology of the 2009 Survey on Living with Chronic Diseases in Canada—hypertension component“. Chronic Diseases and Injuries in Canada 33, Nr. 4 (September 2013): 267–76. http://dx.doi.org/10.24095/hpcdp.33.4.08.
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Introduction The Survey on Living with Chronic Diseases in Canada—hypertension component (SLCDC-H) is a 20-minute cross-sectional telephone survey on hypertension diagnosis and management. Sampled from the 2008 Canadian Community Health Survey (CCHS), the SLCDC-H includes Canadians (aged ≥ 20 years) with self-reported hypertension from the ten provinces. Methods The questionnaire was developed by Delphi technique, externally reviewed and qualitatively tested. Statistics Canada performed sampling strategies, recruitment, data collection and processing. Proportions were weighted to represent the Canadian population, and 95% confidence intervals (CIs) were derived by bootstrap method. Results Compared with the CCHS population reporting hypertension, the SLCDC-H sample (n = 6142) is slightly younger (SLCDC-H mean age: 61.2 years, 95% CI: 60.8–61.6; CCHS mean age: 62.2 years, 95% CI: 61.8–62.5), has more post-secondary school graduates (SLCDC-H: 52.0%, 95% CI: 49.7%–54.2%; CCHS: 47.5%, 95% CI: 46.1%–48.9%) and has fewer respondents on hypertension medication (SLCDC-H: 82.5%, 95% CI: 80.9%–84.1%; CCHS: 88.6%, 95% CI: 87.7%-89.6%). Conclusion Overall, the 2009 SLCDC-H represents its source population and provides novel, comprehensive data on the diagnosis and management of hypertension. The survey has been adapted to other chronic conditions—diabetes, asthma/chronic obstructive pulmonary disease and neurological conditions. The questionnaire is available on the Statistics Canada website; descriptive results have been disseminated by the Public Health Agency of Canada.
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Quandt, Sara A., Natalie J. LaMonto, Dana C. Mora, Jennifer W. Talton, Paul J. Laurienti und Thomas A. Arcury. „COVID-19 Pandemic among Latinx Farmworker and Nonfarmworker Families in North Carolina: Knowledge, Risk Perceptions, and Preventive Behaviors“. International Journal of Environmental Research and Public Health 17, Nr. 16 (10.08.2020): 5786. http://dx.doi.org/10.3390/ijerph17165786.
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(1) Background: The COVID-19 pandemic poses substantial threats to Latinx farmworkers and other immigrants in food production and processing. Classified as essential, such workers cannot shelter at home. Therefore, knowledge and preventive behaviors are important to reduce COVID-19 spread in the community. (2) Methods: Respondents for 67 families with at least one farmworker (FWF) and 38 comparable families with no farmworkers (nonFWF) in North Carolina completed a telephone survey in May 2020. The survey queried knowledge of COVID-19, perceptions of its severity, self-efficacy, and preventive behaviors. Detailed data were collected to document household members’ social interaction and use of face coverings. (3) Results: Knowledge of COVID-19 and prevention methods was high in both groups, as was its perceived severity. NonFWF had higher self-efficacy for preventing infection. Both groups claimed to practice preventive behaviors, though FWF emphasized social avoidance and nonFWF emphasized personal hygiene. Detailed social interactions showed high rates of inter-personal contact at home, at work, and in the community with more mask use in nonFWF than FWF. (4) Conclusions: Despite high levels of knowledge and perceived severity for COVID-19, these immigrant families were engaged in frequent interpersonal contact that could expose community members and themselves to COVID-19.
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Keen, Justin, Emma Nicklin, Andrew Long, Rebecca Randell, Nyantara Wickramasekera, Cara Gates, Claire Ginn, Elizabeth McGinnis, Sean Willis und Jackie Whittle. „Quality and safety between ward and board: a biography of artefacts study“. Health Services and Delivery Research 6, Nr. 22 (Juni 2018): 1–142. http://dx.doi.org/10.3310/hsdr06220.
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BackgroundThere have been concerns about the quality and safety of NHS hospital services since the turn of the millennium. This study investigated the progress that acute NHS hospital trusts have made in developing and using technology infrastructures to enable them to monitor quality and safety following the publication in 2013 of the second Francis report on the scandal at Mid Staffordshire NHS Foundation Trust (The Mid Staffordshire NHS Foundation Trust Public Inquiry. Chaired by Sir Robert Francis QC.Report of the Mid Staffordshire NHS Foundation Trust Public Inquiry. HC 898. London: The Stationery Office; 2013).MethodsA telephone survey of 15 acute NHS trusts in the Yorkshire and the Humber region, and a review of board papers of all acute NHS trusts in England for January 2015, were undertaken. The telephone survey was used to identify trusts for a larger field study, which was undertaken in four acute NHS trusts between April 2015 and September 2016. The methods included the direct observation of the use of whiteboards and other technologies on two wards in each trust, an observation of board quality committees, semistructured interviews and an analysis of the quality and safety data in board papers. Published sources about national and local agencies were reviewed to identify the trust quality and safety data that these agencies accessed and used. An interview programme was also undertaken with those organisations. The Biography of Artefacts approach was used to analyse the data.FindingsThe data and technology infrastructures within trusts had developed over many years. The overall design had been substantially determined by national agencies, and was geared to data processing: capturing and validating data for submission to national agencies. Trust boards had taken advantage of these data and used them to provide assurance about quality and safety. Less positively, the infrastructures were fragmented, with different technologies used to handle different quality and safety data. Real-time management systems on wards, including electronic whiteboards and mobile devices, were used and valued by nurses and other staff. The systems support the proactive management of clinical risks. These developments have occurred within a broad context, with trusts focusing on improving the quality and safety of services and publishing far more data on their performance than they did just 3 years earlier. Trust-level data suggest that quality and safety improved at all four trusts between 2013 and 2016. Our findings indicate that the technology infrastructures contributed to these improvements. There remains considerable scope to rationalise those infrastructures.LimitationsThe four trusts in the main study were, in part, purposively selected, and deliberately biased towards sites that had made progress with designing and deploying real-time ward management systems. This limits the generalisability of the study. The study focused more on the work of nurses and nurse managers, and has relatively little to say about the experiences of doctors or allied health professionals.Future workFuture research might focus on the effects of mobile technologies and electronic whiteboards on acute wards, the value of current national data returns, and the uses and value of trust data warehouses.FundingThe National Institute for Health Research Health Services and Delivery Research programme.
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Davies, Clare E., Tristan Allen, Craig E. Dempsey und Kunal Mishra. „Redefining the relationship between the oil company and its vendor“. APPEA Journal 60, Nr. 2 (2020): 424. http://dx.doi.org/10.1071/aj19237.
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During 2016, BHP committed to produce a petroleum systems model for the complete Exmouth Sub-basin area; such a model would require knowledge of the sub-basin’s evolution through time and a uniquely qualified team to deliver within the agreed time frame. Existing seismic coverage rarely illuminated the deepest portion of the basin; however, through a collaboration with WesternGeco Multiclient, a basin-wide broad-band 3D seismic survey was acquired to underpin the new study to ensure its success. To facilitate this acquisition and the development of the petroleum systems model, BHP and WesternGeco Multiclient created a virtual world-wide team to combine their expertise of seismic acquisition and processing, seismic and potential field interpretation, geochemistry and basin modelling. Although the work was coordinated in Perth (WA, Australia), team members were located in Australia, Europe and the US, where particular specific expertise was located. Both companies made a commitment before the commencement of the project to have open exchange of data, interpretations and knowledge transfer, with one project coordinator. Although individual contributors were located in Australia, Europe and the US, monthly video or telephone coordination meetings combined with weekly meetings between individual specialists, as needed, allowed for the project to be completed to the highest technical quality within the scheduled time frame. The collaborative interpretation from this new seismic data and the resulting petroleum system model has created significant value for both companies, with insights benefiting the industry as a whole as a result of this redefined relationship between company and vendor.
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Tokarev, B. E. „Research on the segments performance of the innovative startups ecosystem in the Russian Federation“. Upravlenie 9, Nr. 1 (08.04.2021): 127–39. http://dx.doi.org/10.26425/2309-3633-2021-9-1-127-139.
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With the determination of the number of new innovative startups businesses, the situation is even more complicated, not only in our country, but also in most countries of the world. In the proposed work, the author made an attempt to implement one of the possible approaches to introducing transparency – an assessment of each of the segments of the startup-launches ecosystem separately. The paper gives the results of study on the evaluation the launch indicators of new startups in the Russian venture market. The article identifies the segments of the venture ecosystem that are directly involved in the launch of new startups. The study obtained an estimate of the number of startups, small and medium-sized companies as well as entrepreneurial startups. To characterize the number of new startups, the author introduces the term performance of segments of the ecosystem of innovative startups. This indicator allows you to use the quantitative characteristics of individual segments and compare them with each other. To obtain quantitative values of newly launched startups, the author conducted a selective telephone survey of representatives of these segments of the ecosystem and collected official data published on the Internet. The author carried out the processing of some data on the basis of the statistics of median values of the estimate of the number of new startups that started sales during 2019. The author collected data for 2020 from secondary sources. The study showed that 4,817 new startups with signs of innovation were launched in Russia in 2020, and an increase of 26 % compared to the previous year. The estimates obtained do not contradict with the published data on the state of the venture industry during the pandemic.
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Anda, Robert F., Dennis L. Dodson, David F. Williamson und Patrick L. Remington. „Health Promotion Data for State Health Departments: Telephone versus in-Person Survey Estimates of Smoking and Alcohol Use“. American Journal of Health Promotion 4, Nr. 1 (September 1989): 32–36. http://dx.doi.org/10.4278/0890-1171-4.1.32.
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During 1988, more than 40 state health departments conducted telephone surveys to obtain state-specific population estimates of the prevalence of adult health behaviors and health practices. However, the comparability of estimates obtained from these telephone surveys with more expensive in-person surveys has not been assessed in an applied setting. This study compared the prevalence estimates of smoking and binge drinking obtained from a telephone survey (N = 1,492) with an in-person survey (N = 2,802) which were conducted by the state of Michigan during 1982–1983. Although the standard errors for the differences in the estimates for the two surveys were relatively large, the actual differences were consistently small within most age-, sex-, and education-specific groups. Despite certain limitations, telephone surveys provide a reasonable alternative to in-person surveys for estimating the prevalence of health behaviors. The data obtained from these surveys are being used to set state health objectives, to plan statewide health promotion programs, and to support public health legislation.
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Baffour, Bernard, Michele Haynes, Mark Western, Darren Pennay, Sebastian Misson und Arturo Martinez. „Weighting Strategies for Combining Data from Dual-Frame Telephone Surveys: Emerging Evidence from Australia“. Journal of Official Statistics 32, Nr. 3 (01.09.2016): 549–78. http://dx.doi.org/10.1515/jos-2016-0029.
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Abstract Until quite recently, telephone surveys have typically relied on landline telephone numbers. However, with the increasing popularity and affordability of mobile phones, there has been a surge in households that do not have landline connections. Additionally, there has been a decline in the response rates and population coverage of landline telephone surveys, creating a challenge to collecting representative social data. Dual-frame telephone surveys that use both landline and mobile phone sampling frames can overcome the incompleteness of landline-only telephone sampling. However, surveying mobile phone users introduces new complexities in sampling, nonresponse measurement and statistical weighting. This article examines these issues and illustrates the consequences of failing to include mobile-phone-only users in telephone surveys using data from Australia. Results show that there are significant differences in estimates of populations’ characteristics when using information solely from the landline or mobile telephone sample. These biases in the population estimates are significantly reduced when data from the mobile and landline samples are combined and appropriate dual-frame survey estimators are used. The optimal choice of a dual-frame estimation strategy depends on the availability of good-quality information that can account for the differential patterns of nonresponse by frame.
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Fowler, Floyd J., Philip Brenner, Anthony M. Roman und J. Lee Hargraves. „The Effects of Nonresponse and Sampling Omissions on Estimates on Various Topics in Federal Surveys: Telephone and IVR Surveys of Address-Based Samples“. Journal of Official Statistics 36, Nr. 3 (01.09.2020): 631–45. http://dx.doi.org/10.2478/jos-2020-0032.
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AbstractWith declining response rates and challenges of using RDD sampling for telephone surveys, collecting data from address-based samples has become more attractive. Two approaches are doing telephone interviews at telephone numbers matched to addresses and asking those at sampled addresses to call into an Interactive Voice Response (IVR) system to answer questions. This study used in-person interviewing to evaluate the effects of nonresponse and problems matching telephone numbers when telephone and IVR were used as the initial modes of data collection. The survey questions were selected from major US federal surveys covering a variety of topics. Both nonresponse and, for telephone, inability to find matches result in important nonresponse error for nearly half the measures across all topics, even after adjustments to fit the known demographic characteristics of the residents. Producing credible estimates requires using supplemental data collection strategies to reduce error from nonresponse.
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Costa, Marie, Fabienne Marcellin, Marion Coste, Tangui Barré, Sandra Nordmann, Marion Mora, Gwenaëlle Maradan et al. „Access to care for people with alcohol use disorder in France: a mixed-method cross-sectional study protocol (ASIA)“. BMJ Open 8, Nr. 9 (September 2018): e024669. http://dx.doi.org/10.1136/bmjopen-2018-024669.
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IntroductionAlcohol use disorder (AUD) is a major public health concern worldwide. In France, only 10% of people with AUD (PWAUD) receive medical care. General practitioners (GP) are one of the main entry points for AUD care. The present ongoing study, entitled ASIA (Access to Care and Indifference toward Alcohol,Accès aux Soins et Indifference à l’Alcoolin French), aims to improve knowledge about factors associated with access to care for AUD by exploring related GP and PWAUD practices, experiences and perceptions.Methods and analysisThe ASIA project is an ongoing cross-sectional multisite study based on a complementary mixed-method approach (quantitative and qualitative) using a convergent parallel design. The double-perspective design of the study will enable us to collect and compare data regarding both PWAUD and GP points of view. For the PWAUD quantitative study, 260 PWAUD will be interviewed using a telephone-based questionnaire. For the qualitative study, 36 PWAUD have already been interviewed. The GP quantitative study will include 100 GP in a 15 min survey. Fifteen GP have already participated in semistructured interviews for the qualitative study. Logistic regression will be used to identify predictors for access to care. With respect to data analyses, qualitative interviews will be analysed using semantic analysis while quantitative logistic regression will be used for quantitative interviews.Ethics and disseminationThis study was approved by the CNIL (French National Commission on Informatics and Liberties) (approval reference number: C16-10, date of approval: 17 July 2017), the CCTIRS (Advisory Committee on Information Processing in Material Research in the Field of Health) and the CEEI (Evaluation and Ethics Committee) (approval reference number: 16–312, date of approval: 8 July 2016) of INSERM (French National Institute of Health and Medical Research). Results from ASIA will be disseminated in peer-reviewed publications, conference presentations, reports and in a PhD thesis.
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Belaya, Vera, und Jon Henrich Hanf. „Managing Russian agri-food supply chain networks with power“. Journal on Chain and Network Science 12, Nr. 3 (01.01.2012): 215–30. http://dx.doi.org/10.3920/jcns2012.x217.
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The importance of power is underlined by many scientists who view it as a key behavioural construct. Power distinguishes itself as an effective tool in coordinating and promoting harmonious relationships, solving conflicts, and enhancing performance. An important challenge is to find out what role power plays in managing supply chain networks, paying specific attention to its effects on coordination and cooperation. The aim of our work is to investigate the role of power in supply chain networks in order to work out a strategy that enables supply chain managers to select an effective mix of power mechanisms. We critically examine the existing literature and elaborate on the role of power in supply chain relationships. We work out and test a theoretical model of the effects of power on cooperation and coordination and discuss possible managerial implications of using power as an effective tool for promoting supply chain management. To verify our research hypotheses we conducted semi-structured in-depth expert interviews via telephone about relationships of international food processing companies with their suppliers in Russia and tested the model using the Partial Least Squares (PLS) approach. Depending on the origin of power, it may have different effects on cooperation and coordination. Based on the results of the survey we worked out a special ranking system for the use of power depending on its expected effect on coordination and cooperation. Expert power has the highest ranking among the other types of power for improving coordination. Therefore, we recommend using this strategy as a first priority for improving coordination. The data in our PLS analysis represent only a single perspective in the dyad: food processing companies. Gathering data from other companies' perspectives, such as retailers or agricultural producers, could have produced different (presumably more realistic or complete) findings. Our study offers recommendations for managers about the use of different types of power in managing the Russian agri-food supply chains, with specific attention paid to coordination and cooperation issues. In order to manage supply chain networks successfully, knowledge of different types of power is essential. The developed ranking of different types of power according to their effects on coordination and cooperation is designed to help managers make the right decisions in choosing the appropriate type of power for coordination purposes.
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Chiu, Stephen Wing-kai, und Niantao Jiang. „The future of telephone surveys in Hong Kong“. Social Transformations in Chinese Societies 13, Nr. 1 (02.05.2017): 2–19. http://dx.doi.org/10.1108/stics-09-2016-0016.
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Purpose This paper aims to compare residential fixed-line telephone surveys with cell phone surveys for assessing the extent of the potential undercoverage issue evaluating the necessity and feasibility of conducting cell phone surveys or dual-frame telephone surveys in Hong Kong. Design/methodology/approach The research team simultaneously carried out a conventional fixed-line telephone survey and a cell phone survey in 2015 with similar features on survey design, sampling and data collection procedures. Two samples with sample size of 801 and 1,203 were achieved separately. Data collected were analysed to see to what extent survey findings will be biased if the sampling frame of telephone surveys is solely based on residential fixed-line numbers in Hong Kong, and if such a bias does exist, whether a survey conducted through cell phones or by adding a cell phone-only (CO) group would be an ideal solution for it. Findings The findings show that the cooperation rates for the cell phone survey were much lower than those of the fixed-line telephone survey. The respondents from two surveys were fairly different. However, estimates of most commonly used socio-demographic characteristics from the latter group had the least bias compared with population statistics. Supplanting the traditional fixed-line survey with a cell phone survey or supplementing it with a CO group will not make the resulting sample a better representative of the population but it will amplify the sample bias on the major social socio-demographic characteristics. Originality/value This paper empirically compares the two types of telephone surveys in a well-designed scientific study.
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Elkasabi, Mahmoud, Z. Tuba Suzer-Gurtekin, James M. Lepkowski, Uiyoung Kim, Richard Curtin und Rebecca Mcbee. „A Comparison of ABS Mail and RDD Surveys for Measuring Consumer Attitudes“. International Journal of Market Research 56, Nr. 6 (November 2014): 737–56. http://dx.doi.org/10.2501/ijmr-2014-017.
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The increasing cost and decreasing coverage of Random Digit Dialing (RDD) landline telephone surveys motivated The Surveys of Consumer Attitudes (SCA) at the University of Michigan to conduct monthly experimental mail survey studies using address-based sampling (ABS). The primary objectives of the experimental studies were to evaluate the feasibility of transitioning the data collection operations from telephone to mail and to investigate differential survey errors between the two modes. Overall mail survey response rates were comparable to the RDD landline survey. Coverage improved using ABS, with more than 20% of the mail responses from non-landline telephone households not covered by the RDD landline telephone surveys. Mail survey respondents from households without landline telephones were more likely to be younger, have lower income, be renters and live in one-person households. There were no apparent measurement or reporting differences between the telephone and mail self-administered modes of data collection. Furthermore, inclusion of non-landline telephone households did not result in any substantial demographic or economic attitude differences between the two approaches.
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Godio, Alberto, und Salvatore Piro. „Integrated data processing for archeological magnetic surveys“. Leading Edge 24, Nr. 11 (November 2005): 1138–44. http://dx.doi.org/10.1190/1.2135119.
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Sticht, Thomas G., C. Richard Hofstetter und Carolyn H. Hofstetter. „Assessing Adult Literacy by Telephone“. Journal of Literacy Research 28, Nr. 4 (Dezember 1996): 525–59. http://dx.doi.org/10.1080/10862969609547939.
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Several industrialized nations have conducted expensive door-to-door surveys of adult literacy. Following a critique of the role of knowledge in literacy, the research presented here examined the construct and action validity of the use of simple checklists to assess the declarative knowledge component of adult's literacy by telephone. Significant relationships were found among knowledge when assessed either by listening (telephone) or by reading (mailed questionnaire) modality. The telephone data showed similar relationships to demographic variables that have been found in the 1993 National Adult Literacy Survey and other literacy surveys during the last half-century. It was concluded that the telephone method may provide a valid, cost-effective alternative to door-to-door assessments of literacy.
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Gripp, Sharon I., A. E. Luloff und Robert D. Yonkers. „Reporting Response Rates for Telephone Surveys Used In Agricultural Economics Research“. Agricultural and Resource Economics Review 23, Nr. 2 (Oktober 1994): 200–206. http://dx.doi.org/10.1017/s1068280500002318.
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Response rates are one indicator of a survey's data quality, as a great deal of importance has been placed on the mail survey's response rate. However, a telephone survey's response rate usually is not reported. Even if one is reported, the numbers used in the calculation are rarely defined making the response rate interpretation unclear. Using a recent telephone survey of Pennsylvania dairy managers, this paper demonstrates how telephone survey data should be reported. Essentially, every research report should include a discussion of how the survey was conducted, a disposition table, and well-defined formulas used to calculate response rates.
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Bailey, Guy, Tom Wikle, Jan Tillery und Lori Sand. „The apparent time construct“. Language Variation and Change 3, Nr. 3 (Oktober 1991): 241–64. http://dx.doi.org/10.1017/s0954394500000569.
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ABSTRACTThe use of apparent time differences to study language change in progress has been a basic analytical construct in quantitative sociolinguistics for over 30 years. The basic assumption underlying the construct is that, unless there is evidence to the contrary, differences among generations of similar adults mirror actual diachronic developments in a language: the speech of each generation is assumed to reflect the language more or less as it existed at the time when that generation learned the language. In providing a mirror of real time change, apparent time forms the basis of a conceptual framework for exploring language change in progress. However, the basic assumptions that underlie apparent time have never been fully tested. This article tests those assumptions by comparing apparent time data from two recent random sample telephone surveys of Texas speech with real time data from the Linguistic Atlas of the Gulf States, which was conducted some 15 years before the telephone surveys. The real time differences between the linguistic atlas data and the data from the telephone surveys provide strong support for the apparent time construct. Whenever apparent time data in the telephone surveys clearly suggest change in progress, the atlas data show substantially fewer innovative forms. Whenever the apparent time data suggest stable variation, the atlas data are virtually identical to that from the more recent surveys. Whenever the relationships between real and apparent time data are unclear, sorting out mitigating factors, such as nativity and subregional residence, clarifies and confirms the relationships. The results of our test of the apparent time construct suggest that it is unquestionably a valid and useful analytical tool.
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Lipps, Oliver. „Interviewer Effects on Cooperation during Initial and Refusal Conversion Fieldwork Phases in Telephone Panel Surveys“. Field Methods 31, Nr. 4 (11.09.2019): 375–93. http://dx.doi.org/10.1177/1525822x19874285.
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Specific interviewer characteristics, interviewer continuity, or matching interviewer and household characteristics may increase cooperation, especially for difficult-to-convince households. In face-to-face surveys, unobserved heterogeneity often makes a proper analysis of interviewer effects impossible. Although surveys conducted in telephone centers usually assign households to interviewers at random, there is less research on interviewer effects on cooperation, probably because telephone surveys produce smaller effects. Using data from a large telephone panel survey, I find interviewer effects only for households that refused to participate in a previous wave. Interviewer continuity or matching interviewers and households on sociodemographic variables has weak effects for any type of household. Interviewer experience has positive effects for previously refusing households only. Telephone survey organizations therefore only need to worry about using specially trained interviewers for refusal conversion calls, while specific assignments of interviewers to households are not necessary.
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Cooley, P. C., H. G. Miller, J. N. Gribble und C. F. Turner. „Automating telephone surveys: using T-ACASI to obtain data on sensitive topics“. Computers in Human Behavior 16, Nr. 1 (Januar 2000): 1–11. http://dx.doi.org/10.1016/s0747-5632(99)00048-5.
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Felderer, Barbara, Antje Kirchner und Frauke Kreuter. „The Effect of Survey Mode on Data Quality: Disentangling Nonresponse and Measurement Error Bias“. Journal of Official Statistics 35, Nr. 1 (01.03.2019): 93–115. http://dx.doi.org/10.2478/jos-2019-0005.
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Abstract More and more surveys are conducted online. While web surveys are generally cheaper and tend to have lower measurement error in comparison to other survey modes, especially for sensitive questions, potential advantages might be offset by larger nonresponse bias. This article compares the data quality in a web survey administration to another common mode of survey administration, the telephone. The unique feature of this study is the availability of administrative records for all sampled individuals in combination with a random assignment of survey mode. This specific design allows us to investigate and compare potential bias in survey statistics due to 1) nonresponse error, 2) measurement error, and 3) combined bias of these two error sources and hence, an overall assessment of data quality for two common modes of survey administration, telephone and web. Our results show that overall mean estimates on the web are more biased compared to the telephone mode. Nonresponse and measurement bias tend to reinforce each other in both modes, with nonresponse bias being somewhat more pronounced in the web mode. While measurement error bias tends to be smaller in the web survey implementation, interestingly, our results also show that the web does not consistently outperform the telephone mode for sensitive questions.
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Bianchini Ciampoli, Luca, Fabio Tosti, Nikos Economou und Francesco Benedetto. „Signal Processing of GPR Data for Road Surveys“. Geosciences 9, Nr. 2 (19.02.2019): 96. http://dx.doi.org/10.3390/geosciences9020096.
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Effective quality assurance and quality control inspections of new roads as well as assessment of remaining service-life of existing assets is taking priority nowadays. Within this context, use of ground penetrating radar (GPR) is well-established in the field, although standards for a correct management of datasets collected on roads are still missing. This paper reports a signal processing method for data acquired on flexible pavements using GPR. To demonstrate the viability of the method, a dataset collected on a real-life flexible pavement was used for processing purposes. An overview of the use of non-destructive testing (NDT) methods in the field, including GPR, is first given. A multi-stage method is then presented including: (i) raw signal correction; (ii) removal of lower frequency harmonics; (iii) removal of antenna ringing; (iv) signal gain; and (v) band-pass filtering. Use of special processing steps such as vertical resolution enhancement, migration and time-to-depth conversion are finally discussed. Key considerations about the effects of each step are given by way of comparison between processed and unprocessed radargrams. Results have proven the viability of the proposed method and provided recommendations on use of specific processing stages depending on survey requirements and quality of the raw dataset.
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Foster, Erin B., Lauren M. McNamara und Kari L. Nysse-Carris. „Considerations for Data Processing in Multi-mode Surveys“. Survey Practice 3, Nr. 6 (01.12.2010): 1–6. http://dx.doi.org/10.29115/sp-2010-0031.
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Chandler, Jesse J. „Surveying Vocational Rehabilitation Applicants Online: A Feasibility Study“. Journal of Disability Policy Studies 30, Nr. 3 (08.04.2019): 164–73. http://dx.doi.org/10.1177/1044207319835188.
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Web surveys enable efficient data collection, but their usefulness is potentially limited when studying people with disabilities, who often lack Internet access. We test the feasibility of collecting web survey data from a sample of state vocational rehabilitation (VR) applicants, inviting nonrespondents to complete a telephone interview instead. People who lacked Internet access were provided with a mobile device and wireless access and were as likely to complete the web surveys as people who already had Internet access. Respondents who elected to complete the survey online versus by telephone differed in level of education and VR experience. These findings suggest that for disability studies, web surveys are an important supplement to, but not a replacement for, traditional data collection efforts.
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Fournier, Louise, und Vivianne Kovess. „A Comparison of Mail and Telephone Interview Strategies for Mental Health Surveys“. Canadian Journal of Psychiatry 38, Nr. 8 (Oktober 1993): 525–33. http://dx.doi.org/10.1177/070674379303800801.
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The high cost of mental health surveys of the general population has sparked interest in less costly research methods. Two low-cost mental health survey strategies (mail and telephone) were compared in terms of cost, response rate and quality of data obtained. A total of 1,074 persons agreed to participate in the study as a sample, one-half by telephone and the other half by mail. They completed the Diagnostic Interview Schedule Self-Administered, a questionnaire designed to be self-administered, which was used to assess specific mental disorders and to evaluate risk factors. In addition, 239 respondents who were selected according to the presence or absence of specific diagnoses were re-interviewed face-to-face using the Diagnostic Interview Schedule as an external criterion. The telephone method yielded a better response rate (15% higher) and better control over answers (for example, less missing data). The mail strategy was less expensive and appeared to yield data of slightly better quality, particularly for respondents suffering from anxiety disorders.
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Galesic, Mirta, Roger Tourangeau und Mick P. Couper. „Complementing Random-Digit-Dial Telephone Surveys with Other Approaches to Collecting Sensitive Data“. American Journal of Preventive Medicine 31, Nr. 5 (November 2006): 437–43. http://dx.doi.org/10.1016/j.amepre.2006.07.023.
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Barnes, Gary, und John Lumley. „Processing gravity gradient data“. GEOPHYSICS 76, Nr. 2 (März 2011): I33—I47. http://dx.doi.org/10.1190/1.3548548.
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As the demand for high-resolution gravity gradient data increases and surveys are undertaken over larger areas, new challenges for data processing have emerged. In the case of full-tensor gradiometry, the processor is faced with multiple derivative measurements of the gravity field with useful signal content down to a few hundred meters’ wavelength. Ideally, all measurement data should be processed together in a joint scheme to exploit the fact that all components derive from a common source. We have investigated two methods used in commercial practice to process airborne full-tensor gravity gradient data; the methods result in enhanced, noise-reduced estimates of the tensor. The first is based around Fourier operators that perform integration and differentiation in the spatial frequency domain. By transforming the tensor measurements to a common component, the data can be combined in a way that reduces noise. The second method is based on the equivalent-source technique, where all measurements are inverted into a single density distribution. This technique incorporates a model that accommodates low-order drift in the measurements, thereby making the inversion less susceptible to correlated time-domain noise. A leveling stage is therefore not required in processing. In our work, using data generated from a geologic model along with noise and survey patterns taken from a real survey, we have analyzed the difference between the processed data and the known signal to show that, when considering the Gzz component, the modified equivalent-source processing method can reduce the noise level by a factor of 2.4. The technique has proven useful for processing data from airborne gradiometer surveys over mountainous terrain where the flight lines tend to be flown at vastly differing heights.
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Berber, M., und W. Wright. „Online kinematic GNSS data processing for small hydrographic surveys“. Ocean Engineering 112 (Januar 2016): 335–39. http://dx.doi.org/10.1016/j.oceaneng.2015.10.001.
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Haines, Seth S., Antoine Guitton und Biondo Biondi. „Seismoelectric data processing for surface surveys of shallow targets“. GEOPHYSICS 72, Nr. 2 (März 2007): G1—G8. http://dx.doi.org/10.1190/1.2424542.
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The utility of the seismoelectric method relies on the development of methods to extract the signal of interest from background and source-generated coherent noise that may be several orders-of-magnitude stronger. We compare data processing approaches to develop a sequence of preprocessing and signal/noise separation and to quantify the noise level from which we can extract signal events. Our preferred sequence begins with the removal of power line harmonic noise and the use of frequency filters to minimize random and source-generated noise. Mapping to the linear Radon domain with an inverse process incorporating a sparseness constraint provides good separation of signal from noise, though it is ineffective on noise that shows the same dip as the signal. Similarly, the seismoelectric signal and noise do not separate cleanly in the Fourier domain, so [Formula: see text]-[Formula: see text] filtering can not remove all of the source-generated noise and it also disrupts signal amplitude patterns. We find that prediction-error filters provide the most effective method to separate signal and noise, while also preserving amplitude information, assuming that adequate pattern models can be determined for the signal and noise. These Radon-domain and prediction-error-filter methods successfully separate signal from [Formula: see text] stronger noise in our test data.
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Black, Michele C., Marcie-Jo Kresnow, Thomas R. Simon, Ileana Arias und Gene Shelley. „Telephone Survey Respondents’ Reactions to Questions Regarding Interpersonal Violence“. Violence and Victims 21, Nr. 4 (August 2006): 445–59. http://dx.doi.org/10.1891/0886-6708.21.4.445.
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Concerns have been raised regarding the appropriateness of asking about violence victimization in telephone interviews and whether asking such questions increases respondents’ distress or risk for harm. However, no large-scale studies have evaluated the impact of asking such questions during a telephone interview. This study explored respondents’ reactions to questions regarding violence in two large recently completed telephone surveys. After respondents were asked about violence, they were asked if they thought surveys should ask such questions and whether they felt upset or afraid because of the questions. In both surveys, the majority of respondents (regardless of their victimization history) were willing to answer questions about violence and were not upset or afraid because of the questions. More than 92% of respondents thought such questions should be asked. These results challenge commonly held beliefs and assumptions and provide some assurance to those concerned with the ethical collection of data on violent victimization.
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McVey, Dominic, Nick Moon und Iain Noble. „‘Bringing it All Back Home’ - Using RDD Telephone Methods for Large-scale Social Policy and Opinion Research in the UK“. Market Research Society. Journal. 40, Nr. 2 (März 1998): 1–27. http://dx.doi.org/10.1177/147078539804000201.
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Despite the extent of telephone ownership in the UK rising to levels comparable with those in the USA the use of telephone methods here, although growing, remains at a consistently and significantly lower level, even where the use of such methods might solve specific research problems. The major reason for this is the hitherto presumed inability to apply two stage Random Digit Dialling (Mitofsky-Waksberg) sampling methods. The authors review the position in the UK and the deficiencies of telephone sampling methods used there hitherto. They present proposals for a new method of implementing RDD in the UK and thus true probability sampling for telephone methods. In addition they present data from a number of surveys carried out to test the proposed methods, in particular a survey of health related behaviour and beliefs among adults aged 16-74 in England and a number of opinion polls. They also review briefly other polls carried out during the 1997 General Election campaign. They review the effectiveness of the proposed method and the possible future for telephone surveys in the UK.
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Myllyluoma, Jaana, Patty Greenberg, Charles Wolters und Pamela Kaifer. „Assessing Community—Wide Outcomes of Prevention Marketing Campaigns through Telephone Surveys“. Social Marketing Quarterly 6, Nr. 1 (März 2000): 23–32. http://dx.doi.org/10.1080/15245004.2000.9961090.
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Researchers at Battelle Centers for Public Health Research and Evaluation (CPHRE) were contracted by the Centers for Disease and Prevention (CDC) to conduct a random sample survey to serve as one component of the evaluation of the Prevention Marketing Initiative (PMI) Local Site Demonstration Project, a community-based HIV prevention program for adolescents. Data were collected from 1,402 adolescents over a 23-month period. A five wave, cross-sectional design was used. A dual sampling strategy combined Random Digit Dialing (RDD) with Listed Household (LHH) samples. Particular care was devoted to ensuring the rights of teenaged participants. Data were collected anonymously and concerns about confidentiality and privacy informed design and operational decisions. Response rate goals were achieved. Factors that may have contributed to the adequacy of the response rate include the use of advance letters and a toll-free phone line as well as sensitivity to the needs and concerns of the target population, the perceived legitimacy of CDC research and the perseverance of the interviewers.
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Fournier, Louise, Alain D. Lesage, Jean Toupin und Mireille Cyr. „Telephone Surveys as an Alternative for Estimating Prevalence of Mental Disorders and Service Utilization: A Montreal Catchment Area Study“. Canadian Journal of Psychiatry 42, Nr. 7 (September 1997): 737–43. http://dx.doi.org/10.1177/070674379704200706.
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Background: Large-scale mental health surveys have provided invaluable information regarding the prevalence of specific mental disorders and service use for mental health reasons. Unfortunately, because vast surveys conducted face to face are very costly, many countries and provinces do not embark upon this path of research, thus depriving themselves of a rich source of data useful for service planning. Method: As an alternative, the authors undertook a telephone survey with a sample of 893 residents from a Montreal catchment area. Mental disorders were assessed by the Composite International Diagnostic Interview Simplified (CIDIS), an instrument especially designed to be used in mail or telephone surveys. Service utilization was measured by an instrument similar to those used in recent large Canadian or American surveys. Results: The prevalence rate for any mental disorder was lower in this study than in some large-scale epidemiological surveys reviewed. This could be explained by methodological differences, such as number of disorders covered and period of reference. With regard to specific mental disorders, results appeared very similar to those of other studies. Concerning service utilization, rates tended to be higher than in other studies, and this finding could reflect real differences between Quebec and other Canadian provinces or the United States. Conclusions: Aside from being lower in cost, telephone surveys can yield results comparable to those obtained in large-scale epidemiological surveys conducted by means of face-to-face interviews.
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Kaskutas, Lee A., und Thomas K. Greenfield. „The Role of Health Consciousness in Predicting Attention to Health Warning Messages“. American Journal of Health Promotion 11, Nr. 3 (Januar 1997): 186–93. http://dx.doi.org/10.4278/0890-1171-11.3.186.
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Purpose. Guided by information processing theory and the health belief model, this paper considers the relationship between health consciousness among the general population and attention to environmental health warnings about alcohol consumption. Mechanisms of exposure to three dominant types of impersonal alcohol-related health messages in the environment are explored. Design. Cross-sectional survey using telephone interview data. Subjects. A representative nationwide sample of adults was interviewed in 1993 ( n = 1026), with a response rate of 63%. Measures. Key variables include exposure to warning labels on alcoholic beverages, to point-of-sale posters, and to advertisements in the media, as well as respondents' alcohol consumption, health problems (indicative of salience of health warnings), and level of health consciousness assessed by items tapping concern with nutrition and seeking information on health topics. Results. In the total sample, over a third had seen a warning label or poster and almost all had seen an advertisement about the risks associated with alcohol consumption in 1993. Survey respondents scored very high on five individual items that make up the health consciousness scale introduced here, with 69% endorsing all items. The scale demonstrated good internal reliability (alpha = .70) and was significantly correlated ( p <. 01) with not enjoying getting drunk and with usually reading product warning labels, suggesting construct validity. Yet the hypothesized strong relationships between health consciousness and attention to health warnings about drinking were not observed; nor was salience of messages a predictor of recall. Importantly, high proportions of underage drinkers and young adults at elevated risk for drinking problems are reached by container warning label messages. Mechanisms of exposure recall vary based on message source, with “container label recall” associated with heavier drinking, younger age, and purchasing patterns; “poster recall” associated with purchasing and health consciousness; and “advertisement recall” associated with heavy consumption and younger age. Conclusions. These results are contrary to predictions from skeptics of broad-based informational interventions, who argue that only the already-health conscious are attentive to health warnings about the risks of alcohol consumption. These data suggest that the label is reaching intended target audiences, especially younger people, males, and heavier alcohol consumers. Future research in predicting attention to impersonal health warnings in the environment should continue to improve the assessment of constructs such as salience and health consciousness, and should further test the applicability of available theoretical models. Subsequent research should also consider additional measures to lap mechanisms of exposure to impersonal health messages to enable a better understanding of the population that is not being reached by such public health interventions.
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Taylor, S. M., und K. L. Ryan. „Concurrent Western Australian telephone surveys highlight the advantages of sampling from a registry of recreational fishers“. ICES Journal of Marine Science 77, Nr. 6 (06.07.2019): 2181–91. http://dx.doi.org/10.1093/icesjms/fsz115.
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Abstract Surveys play an integral role in providing reliable recreational fishing information for the sustainable management of fisheries resources. The selection of a representative sample is an important and often challenging part of designing surveys. Here we compare concurrent telephone surveys conducted in 2016 and 2017 using a telephone directory (White Pages®, WP) and a Recreational Boat Fishing Licence (RBFL) as sampling frames. Information on boat- and shore-based recreational fishing was collected from both surveys. The response rates for the RBFL surveys were more than double those from the WP surveys. The RBFL surveys identified more respondents who had recreationally fished in the previous 12 months compared to the WP surveys. Fishing activity differed markedly between fishers in the WP and RBFL surveys; however, characteristics were consistent for boat-based fishers sampled from the two types of surveys. The high levels of sample loss observed in the WP surveys suggest that other general population lists may provide greater coverage of shore-based fishers. We recommend testing the demographic and behavioural characteristics of recreational fishers sampled in offsite surveys against benchmark data to assist in assessing whether or not the characteristics of the sample are representative of the target population.
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Coderre, Franois, Anne Mathieu und Natalie St-Laurent. „Comparison of the Quality of Qualitative Data Obtained through Telephone, Postal and Email Surveys“. International Journal of Market Research 46, Nr. 3 (Mai 2004): 349–57. http://dx.doi.org/10.1177/147078530404600303.
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Vicente, Paula, und Elizabeth Reis. „Coverage Error in Internet Surveys: Can Fixed Phones Fix It?“ International Journal of Market Research 54, Nr. 3 (Mai 2012): 323–45. http://dx.doi.org/10.2501/ijmr-54-3-323-345.
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The internet is increasingly being used for cross-sectional surveys and online panels. Although internet accessibility is growing across developed and developing countries, it seems unlikely that the internet alone will ever provide complete coverage of the general population. Given the incomplete coverage and imbalanced penetration rate of the internet across segments of the population, it is pertinent both for survey companies and academics to assess the potential of mixing the internet with other survey modes as part of a strategy to assure validity of inferential samples when surveying general populations. The purpose of this research was to evaluate to what extent coverage error in internet surveys can be reduced by surveying the offline population via telephone. We use data from Eurobarometer collected in the EU27 member states to simulate first an internetbased survey and then a mixed-mode survey combining the internet with the telephone. Comparisons are made to identify differences in the socio-demographic characteristics of internet households and those of non-internet households with telephone. Coverage error is also estimated in each survey design. Findings reveal significant socio-demographic differences and although the coverage error is reduced in the mixed-mode survey design, it cannot be completely eliminated. Moreover, the outcomes are not homogeneous across countries.
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Simsek, Zeki. „Sample surveys via electronic mail: a comprehensive perspective“. Revista de Administração de Empresas 39, Nr. 1 (März 1999): 77–83. http://dx.doi.org/10.1590/s0034-75901999000100010.
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Although postal questionnaires, personal interviewing, and telephone interviewing are the main methods of survey-based research, there is an increasing use of e-mail as a data collection medium. However, little, if any, published Western research in general and that of Turkish in particular have investigated e-mail survey technique from pure survey research perspective. Attempting to develop a framework to assess e-mail as a data collection mean, the purpose of this study is to explore e-mail-based questionnaire technique from complementary angles. To this goal, sample representativeness, data quality, response rates, and advantages and disadvantages of e-mail surveying are discussed.
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Regmi, Pramod R., Elizabeth Waithaka, Anjana Paudyal, Padam Simkhada und Edwin Van Teijlingen. „Guide to the design and application of online questionnaire surveys“. Nepal Journal of Epidemiology 6, Nr. 4 (01.05.2017): 640–44. http://dx.doi.org/10.3126/nje.v6i4.17258.
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Collecting research data through traditional approaches (face-to-face, postal or telephone survey) can be costly and time consuming. The emerging data collection approach based on internet/e-based technologies (e.g. online platforms and email), is a relatively cost effective survey alternative. These novel data collection strategies can collect large amounts of data from participants in a short time frame. Similarly, they also seem to be feasible and effective in collecting data on sensitive issues or with samples they are generally hard to reach, for example, men who have sex with men (MSM) or migrants. As a significant proportion of the population currently in the world are digitally connected, the shift from postal (paper-pencil) or telephone towards online survey use in research is in the interests of researchers in academia as well as in the commercial world. However, compared to designing and executing paper version of the questionnaire, there is limited literature to help a starting researcher with the design and a use of online questionnaires. This short paper highlights issues around: a) methodological aspect of online questionnaire survey; b) online survey planning and management; and c) ethical concerns that may arise while using this option. We believe that this paper will be useful for researchers who want to gain knowledge or apply this approach in their research.
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Langendonk, Jacqueline M., C. E. M. van Beijsterveldt, Silvia I. Brouwer, Therese Stroet, James J. Hudziak und Dorret I. Boomsma. „Assessment of Motor Milestones in Twins“. Twin Research and Human Genetics 10, Nr. 6 (01.12.2007): 835–39. http://dx.doi.org/10.1375/twin.10.6.835.
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AbstractThe aim of this study was to investigate the reliability of obtaining through mailed surveys maternal reports of specific major motor milestones achievement. To accomplish this aim we compared and contrasted mailed survey data and telephone interview data on a series of questions about age at which motor milestones were achieved. We used monthly telephone interviews with mothers of 238 twin pairs, beginning at age 6 months, which ascertained the age at which each specific milestone was met. The contrasting ‘through the mail’ survey was sent after the second birthday of an independent group of children, and included 463 twin pairs. All twins were born between March 2003 and March 2004. Comparisons were made for the following 5 milestones: sitting without support, hands and knees crawling, turning from back to belly, standing without support, and walking without support. There was no difference between the concurrent telephone interviews and the retrospective through the mail survey on any of the landmarks, except ‘standing without support’. From this work we conclude that data on achieving milestones can be reliably obtained through the mail using retrospective surveys when the children are 2 years of age.
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Allen, T. J., und P. Whiting. „ADVANCES IN 3-D SEISMIC DATA PROCESSING TECHNIQUES“. APPEA Journal 32, Nr. 1 (1992): 276. http://dx.doi.org/10.1071/aj91021.
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Several recent advances made in 3-D seismic data processing are discussed in this paper.Development of a time-variant FK dip-moveout algorithm allows application of the correct three-dimensional operator. Coupled with a high-dip one-pass 3-D migration algorithm, this provides improved resolution and response at all azimuths. The use of dilation operators extends the capability of the process to include an economical and accurate (within well-defined limits) 3-D depth migration.Accuracy of the migration velocity model may be improved by the use of migration velocity analysis: of the two approaches considered, the data-subsetting technique gives more reliable and interpretable results.Conflicts in recording azimuth and bin dimensions of overlapping 3-D surveys may be resolved by the use of a 3-D interpolation algorithm applied post 3-D stack and which allows the combined surveys to be 3-D migrated as one data set.
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Klausch, Thomas, Barry Schouten und Joop J. Hox. „Evaluating Bias of Sequential Mixed-mode Designs Against Benchmark Surveys“. Sociological Methods & Research 46, Nr. 3 (06.07.2015): 456–89. http://dx.doi.org/10.1177/0049124115585362.
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This study evaluated three types of bias—total, measurement, and selection bias (SB)—in three sequential mixed-mode designs of the Dutch Crime Victimization Survey: telephone, mail, and web, where nonrespondents were followed up face-to-face (F2F). In the absence of true scores, all biases were estimated as mode effects against two different types of benchmarks. In the single-mode benchmark (SMB), effects were evaluated against a F2F reference survey. In an alternative analysis, a “hybrid-mode benchmark” (HMB) was used, where effects were evaluated against a mix of the measurements of a web survey and the SB of a F2F survey. A special reinterview design made available additional auxiliary data exploited in estimation for a range of survey variables. Depending on the SMB and HMB perspectives, a telephone, mail, or web design with a F2F follow-up (SMB) or a design involving only mail and/or web but not a F2F follow-up (HMB) is recommended based on the empirical findings.
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Weijters, Bert, Maggie Geuens und Niels Schillewaert. „Response Styles and how to Correct them“. GfK Marketing Intelligence Review 1, Nr. 2 (01.11.2009): 44–53. http://dx.doi.org/10.2478/gfkmir-2014-0077.
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Abstract Cross-mode surveys are on the rise. Unfortunately, data obtained from different modes of data collection (e.g., telephone and online data) may not be comparable due to measurement bias, especially differences in acquiescence, disacquiescence, extreme and midpoint response styles. This article discusses a study that finds response style differences between data based on the same questionnaire, but obtained by different modes of data collection: paper-and-pencil questionnaires, telephone interviews, and online questionnaires. Similar problems may also occur in cross-national data. We propose a new method to measure response styles and correct for them: the representative indicators response style means and covariance structure (RIRSMACS) method
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Levine, Burton, Karol Krotki und Paul J. Lavrakas. „Redirected Inbound Call Sampling (RICS)“. Public Opinion Quarterly 83, Nr. 2 (2019): 386–411. http://dx.doi.org/10.1093/poq/nfz024.
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Abstract Redirected Inbound Call Sampling (RICS) is an emerging, nonprobability sampling methodology in which calls to nonworking numbers from callers throughout the United States are redirected to a telephone survey recruitment protocol and data collection system. The use of automated, interactive voice response technologies to recruit, screen, and collect data achieves significant cost savings and greatly reduces the time of fielding a survey compared with traditional dual-frame random-digit dialing (DFRDD) surveys that use interviewers for recruitment and data collection. The implementation of RICS that we fielded resulted in respondents who match some demographics of the population about as well as DFRDD telephone surveys. However, we demonstrate some non-ignorable challenges with measurement error in certain types of questions that arise from primacy effects associated with using an interactive voice response system for data collection. We present the results of a RICS study that was designed to better understand the reliability and validity of the data these surveys generate. The investigation presented in this manuscript is a first step to evaluating if RICS can be a fit-for-purpose solution for some survey needs. Our data suggest there is sufficient promise in the RICS methodology to warrant continued development and refinement.
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Pebody, R. G., N. L. Boddington, H. K. Green, S. Bolotin, A. Charlett und J. M. Watson. „Assessing the severity of influenza: a role for longitudinal telephone surveys?“ Epidemiology and Infection 146, Nr. 16 (15.08.2018): 2042–48. http://dx.doi.org/10.1017/s0950268818002261.
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AbstractDuring the 2009 influenza pandemic, a rapid assessment of disease severity was a challenge as a significant proportion of cases did not seek medical care; care-seeking behaviour changed and the proportion asymptomatic was unknown. A random-digit-dialling telephone survey was undertaken during the 2011/12 winter season in England and Wales to address the feasibility of answering these questions. A proportional quota sampling strategy was employed based on gender, age group, geographical location, employment status and level of education. Households were recruited pre-season and re-contacted immediately following peak seasonal influenza activity. The pre-peak survey was undertaken in October 2011 with 1061 individuals recruited and the post-peak telephone survey in March 2012. Eight hundred and thirty-four of the 1061 (78.6%) participants were successfully re-contacted. Their demographic characteristics compared well to national census data. In total, 8.4% of participants self-reported an influenza-like illness (ILI) in the previous 2 weeks, with 3.2% conforming to the World Health Organization (WHO) ILI case definition. In total, 29.6% of the cases reported consulting their general practitioner. 54.1% of the 1061 participants agreed to be re-contacted about providing biological samples. A population-based cohort was successfully recruited and followed up. Longitudinal survey methodology provides a practical tool to assess disease severity during future pandemics.
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Sakshaug, Joseph W., Alexandru Cernat und Trivellore E. Raghunathan. „Do Sequential Mixed-Mode Surveys Decrease Nonresponse Bias, Measurement Error Bias, and Total Bias? An Experimental Study“. Journal of Survey Statistics and Methodology 7, Nr. 4 (11.01.2019): 545–71. http://dx.doi.org/10.1093/jssam/smy024.
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Abstract Mixing multiple modes of survey data collection has become standard practice in survey research. Mixed-mode surveys are faced with a slew of design decisions regarding which types of modes to administer and which sequence to administer them in. Such decisions are largely based on administrative objectives, such as minimizing costs and maximizing response rates. However, just as important to these mixed-mode decisions is their impact on nonresponse bias, measurement error bias, and total bias, which are understudied issues in the mixed-mode literature. In this article, we report on a sequential mixed-mode experiment of young adult drivers randomized to one of two mode sequences: an interviewer-administered (telephone) mode with self-administered (mail) follow-up, or the reverse sequence. Using a mix of direct and indirect bias estimation strategies, we find support for the notion that implementing a second mode of data collection can reduce nonresponse and measurement error bias, but the sequence in which the modes are administered makes a difference: the mail-telephone sequence minimizes bias to a greater extent than the telephone-mail sequence, relative to the starting mode and overall. However, a backfiring effect was found: despite reducing both nonresponse and measurement error bias, switching from mail to telephone increased the total bias in a key estimate of traffic accidents. A discussion of these findings and their implications for survey practice are provided in conclusion.
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MacLennan, Kris, und Yaoguo Li. „Denoising multicomponent CSEM data with equivalent source processing techniques“. GEOPHYSICS 78, Nr. 3 (01.05.2013): E125—E135. http://dx.doi.org/10.1190/geo2012-0226.1.
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Frequency-domain controlled-source electromagnetic surveys can be negatively affected by near-surface geologic features, resulting in static shifts in the observed electric field amplitude data. We propose using an equivalent source method to denoise electric field data from frequency-domain controlled-source electromagnetic (CSEM) surveys. The equivalent source method can either be applied individually to data from each measured frequency or simultaneously to data from all frequencies measured. We demonstrate the effectiveness of the method by denoising an individual synthetic CSEM survey with data contaminated with noise from near-surface conductive bodies, as well as a synthetic time-lapse survey representing resistivity changes in a target due to, for instance, [Formula: see text] sequestration. We also apply the equivalent source method to denoise a set of controlled-source audio-magnetotelluric data affected by static shift from a field survey in western China.
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Nagpal, Karan, Mitali Roy Mathur, Abhilash Biswas und Andrew Fraker. „Who do phone surveys miss, and how to reduce exclusion: recommendations from phone surveys in nine Indian states“. BMJ Global Health 6, Suppl 5 (August 2021): e005610. http://dx.doi.org/10.1136/bmjgh-2021-005610.
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Computer-assisted telephone interviews (CATI) through mobile phones are a low-cost, rapid and safe way to collect data. However, decisions for how such mobile phone surveys are designed and implemented, and their data analysed, can have implications for the sample reached, and in turn affect the generalisability of sample estimates. In this practice paper, we propose a framework for extending the use of CATI–mobile phone surveys in India, which can be applied broadly to future surveys conducted using this method. Across the stages of design, implementation and analysis, we outline challenges in ensuring that the data collected through such surveys are representative and provide recommendations for reducing non-coverage and non-response errors, thereby enabling practitioners in India to use CATI–mobile phone surveys to estimate population statistics with lower bias. We support our analysis by drawing on primary data that we collected in five mobile phone surveys across nine Indian states in 2020. Our recommendations can help practitioners in India improve the representativeness of data collected through mobile phone surveys and generate more accurate estimates.
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Newby, Rick, John Watson und David Woodliff. „SME Survey Methodology: Response Rates, Data Quality, and Cost Effectiveness“. Entrepreneurship Theory and Practice 28, Nr. 2 (März 2003): 163–72. http://dx.doi.org/10.1046/j.1540-6520.2003.00037.x.
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Cost effective data collection is an important methodological issue for small and medium enterprise (SME) researchers. There is a generally held view that mail surveys are the most efficient means of collecting empirical data, despite the potential difficulties associated with low response rates. To enhance the usefulness of mail surveys, researchers have suggested a variety of strategies aimed at improving response rates. While previous studies have examined the effect on response rates of many of these strategies, their impact on data quality and on the cost effectiveness of data collection is less well understood. This study evaluates four response–inducing strategies (printing the survey instrument on colored paper, telephone pre–notification, payment of a monetary incentive, and a follow–up mailing) in terms of their effect on data quality, response rates, and cost effectiveness for a population of SMEs.
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Wilcox, Nancy S., Joseph S. Rossi und James O. Prochaska. „Rates and Responses of Distressed Women to Phone Survey Screening and Recruitment“. Psychological Reports 58, Nr. 3 (Juni 1986): 891–98. http://dx.doi.org/10.2466/pr0.1986.58.3.891.
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Telephone interviews were used to assess both the prevalence of psychic distress among women during the past 12 months and the willingness of respondents to participate in a study of how women employ self-change efforts to cope with emotional distress. A second purpose of this research was to demonstrate the general effectiveness of telephone surveys in assessing psychological distress. The major findings indicated that the experience of having been nervous or upset was not uncommon: 64% of the 140 respondents indicated some distress, while 31% had been distressed for more than just a couple of days; also, the majority of distressed women were willing to complete an initial questionnaire (81%), a personal interview (53%), and/or follow-up questionnaires (76%). Respondents who reported greater distress were more willing to participate in the study than were respondents who reported less distress. These findings agree with those of a national household interview survey of psychological distress. Our results suggest that telephone surveys represent an effective alternative method for collecting epidemiological data on the sensitive topic of emotional distress.
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Balińska, Agata. „Data collection methods in rural tourism in the eyes of respondents“. Studia Periegetica 29, Nr. 1 (22.03.2020): 115–26. http://dx.doi.org/10.5604/01.3001.0014.1234.
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The aim of this study was to verify the reliability and user-friendliness of some of the most popular ways of collecting information from respondents. The article provides a synthetic review of the use of various research methods and techniques, which is supplemented by results of the author’s own survey of 280 people who visited guest farms in rural areas of Mazowieckie province in 2019. The respondents found online and paper-based surveys the most user-friendly method while they rated telephone interviews as the least user-friendly. Asked to assess the reliability of data collection techniques, the respondents considered covert observation and mystery shopping to be the most reliable, while the telephone interview was regarded as the least trustworthy. The assessment of the user-friendliness and reliability of different data collection methods and techniques varied by gender, age and the level of education. It can be expected that insights from the study can help to improve the methodology of rural tourism research.
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Auken, Esben, Joakim Westergaard, Anders V. Christiansen und Kurt Sørensen. „Processing and inversion of SkyTEM data for high resolution hydrogeophysical surveys“. ASEG Extended Abstracts 2007, Nr. 1 (01.12.2007): 1–4. http://dx.doi.org/10.1071/aseg2007ab007.
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