The appropriateness of using a counter app in experimental studies assessing unwanted intrusive thoughts

The reliable and valid assessment of unwanted intrusive thoughts (UITs) is crucial. The main aim of the current research was to investigate if individuals who used a counter app (a program on a mobile device that is used to count the frequency of an event by pressing the volume-up button) to assess UITs retrospectively overreported the number of UITs. The secondary aim was to establish preliminary psychometric qualities of the counter app...