© 1976 Oxford University Press
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Response Variation and Location of Questions Within a Questionnaire
1Research Associate
2Professor of Epidemiology Department of Epidemiology, The Johns Hopkins University School of Hygiene and Public Health. The Johns Hopkins Training Center for Public Health Research P.O. Box 2067, Hagerstown, Maryland, USA 21740.From the Community Mental Health Epidemiology program, Center for Epidemiologic Studies, Division of Extramural Research Programs, National Institute of Mental Health.This study was supported in part by Contract HSM 42-71-32 from the National Institute of Mental Health, and by Research Career Award HL21,670 from the National Heart and Lung Institute
5Reprint requests should be addressed to Mr. K.J. Helsing.
Helsing, K. J. (Dept. Epidemiology, Johns Hopkins Training Center for Public Health Research, P.O. Box 2067, Hagerstown, Maryland, USA 21740) and Comstock, G. W. Response variation and location of questions within a questionnaire. International Journal of Epidemillogy 1976, 5: 125130.
In a questionnaire administered to a general population sample of 1673 adults, a 14-item scale of social desirability was divided into two groups of questions, with the first group of seven questions appearing early in the questionnaire and the second group of seven questions toward the end. For 220 of the respondents, the positions of the two sections of the scale were interchanged, permitting analysis of the effect of location on responses. For 11 of the 14 questions, almost evenly divided between desirable and undesirable behaviour, the percentage answering true was higher when the questions was asked early than when it was asked late. The difference was statistically significant for five of the 11, four of them relating to socially undesirable behaviour. The results indicate that responses can be dependent on the location of questions in a questionnaire, and that the effect of question location may not be the same for groups with different personal characteristics. For this reason, it seems unwise to alter the administration or design of a questionnaire in any way if the results are to be compared directly to those of other studies, unless the altered questionnaire is standardized against the original version.
Received 26 January 1976