Motivation to Report Sensitive Behaviors on Surveys: Evidence From a Bogus Pipeline Experiment1

We examined the effects of a procedure designed to increase motivation to give accurate reports of socially sensitive behaviors frequently collected in surveys. Respondents were assigned at random to a bogus pipeline condition, in which they were told that inaccurate answers could be detected by a physiological recording device, or to a control condition. Respondents in both conditions were interviewed with a questionnaire that contained 19 items ranging from smoking and exercise frequency to number of sexual partners and illicit drug use. While the bogus pipeline procedure generally increased the reporting of sensitive behavior, in one instance it reduced the proportion of respondents who reported a socially desirable behavior (exercising), indicating that respondents were motivated to respond accurately and not just to report more occurrences.