Instructional Manipulation Checks (IMCs) are intended to detect inattention, a common occurrence in survey responding. We use eye tracking to empirically assess the attention that survey respondents dedicate to a short and a long IMC. We find that all 21 respondents pass the short IMC. In contrast, six respondents fail the long IMC. Our…

In online surveys, the use of manipulation checks aimed at measuring respondents' attentiveness has become common. More than being measures of attentiveness pertaining to a specific survey, instructional manipulation checks (IMC) could work as generic measures of the quality of the answers a person gives when completing a questionnaire. By using…

This article reports on an exploratory study aimed to identify which ways of marking required and optional fields help older people fill in web forms correctly. Drawing on a pilot study and selective attention research in ageing, modified versions of widely used forms were created, in which standard asterisks were replaced with one of three…