The Influence of Response Lines on Response Behavior in the Context of Open-Question Formats
Research on questionnaire design has shown that respondents take a questionnaire’s formal aspects into account when formulating their answers to closed-ended questions (e.g., rating scales, multiple-choice questions). As similar research on open-response questions has been scanty, the objective of this study was to investigate the systematic influence of formal features of open-response questions on response behavior. Specifically, in two studies using different topics of opinion, we examined how the responses to open-ended questions vary as a function of the number of lines provided for the response. In both studies, increasing the number of response lines resulted in a constant increase in response length (quantity). It also resulted in an increase in the number of arguments in a response (quality) when only a few response lines were provided, which plateaued when many lines were provided. Overall, these results demonstrate that formal features of open-response questions implicitly communicate the expected quantity and quality of the answer.