“…Advances in handheld computing (e.g., PDAs, smartphones) led to an explosion in daily life research in the 2000s, using what are now collectively referred to as ambulatory assessment (AA) methods (Trull & Ebner-Priemer, 2014). 1 Several previous special issues, including one in this journal (Westmeyer, 2007) have covered AA (e.g., Kubiak & Stone, 2012;Schimmack & Diener, 2003) and its application to diverse subfields, including clinical psychology (Trull & Ebner-Priemer, 2009), addiction (Tomko & McClure, 2018), health psychology (Shiffman & Stone, 1998), and adolescent development (Modecki, Goldberg, Ehrenreich, Russell, & Bellmore, 2019). These special issues highlight the strengths of AA methods: capturing dynamic psychological processes in everyday life, thus providing a different perspective than traditional laboratory and global/ retrospective questionnaire methods.…”