“…The ubiquitous role of questionnaires to the exclusion of other methods has come with considerable costs, particularly in areas where self–reports are unrelated to objective behaviours. Areas such as self–regulation (Cyders & Coskunpinar, 2011; B. Reynolds, Ortengren, Richards, & de Wit, 2006; Sharma, Markon, & Clark, 2014), emotions (Mauss & Robinson, 2009; Wojcik, Hovasapian, Graham, Motyl, & Ditto, 2015), physical activity (Prince et al, 2008), sexuality (Stanton, Boyd, Pulverman, & Meston, 2015), and technology use (Boase & Ling, 2013; Ellis, Davidson, Shaw, & Geyer, 2019) are just a few domains where self–reports reveal a tenuous connection to objective measures of the same constructs. While self–reports are often taken as a face–valid representation of an empirical truth (e.g.…”