Cognitive pretest interview guide (Think-aloud protocol) for the DigiMed1 study

This interview guide was developed for the cognitive pretesting of the DigiMed1 questionnaire on psychological processes in informed decision-making. Using a think-aloud approach, participants were asked to verbalize their thoughts while reading the vignette, and patient information material, and while answering items on risk perception, stress, emotions, satisfaction, comprehensibility, and decision-making. The aim of the interviews was to identify problems in item wording, comprehension, and response processes.