The Effects of Cash, Electronic, and Paper Gift Certificates as Respondent Incentives for a Web-Based Survey of Technologically Sophisticated Respondents

Abstract

An experiment was conducted to determine the effectiveness of three invitation and incentivecombinations in a web-based survey. A stratified convenience sample of 434 researchers who were target users of a collaboratory for earthquake engineering was randomly divided into three experimental conditions: (a) a $5 bill sent with the survey instructions via first class mail, (b) a $5 gift certificate code to Amazon.com sent with the survey instructions via first-class mail, or (c) a $5 gift certificate code to Amazon.com sent with the survey instructions via e-mail. Overall response was 43%. Results show that $5 bills led to significantly higher response rates than either gift certificate condition (57% for cash vs. 36% for the two gift certificate conditions, [UNKNOWN]2(1) = 9.3, p < .01). This suggests that cash is a superior incentive for an online survey, even with technologically sophisticated respondents. This may be due to the perceived limitations, delayed payoff, or reduced visibility of online gift certificates.