Cognitive interviewing, based on the self-report methods of Ericsson and Simon, is a key form of qualitative research that has developed over the past thirty years. The primary objective of cognitive interviewing, also known as cognitive testing, is to understand the cognitive mechanisms underlying the survey-response process. An equally important aim is contributing to the development of best practices for writing survey questions that are well understood and that produce low levels of response error. In particular, an important applied objective is the evaluation of a particular set of...