The Accuracy and Validity of Self-Reported Social Media Use Measures Among Adolescents
A growing number of studies have tried to assess the effects of social media on adolescents, who are among the most avid social media users. To establish the effects of social media use, we need accurate and valid instruments to measure adolescents’ time spent with these media. The aim of this preregistered study was to examine the accuracy and validity of retrospective surveys and experience sampling methods (ESM), by comparing adolescents’ responses to these self-report measures with their digital trace data. The sample consisted of 131 adolescents (48% girls; Mage = 14.1) with Android smartphones. In both retrospective surveys and ESM, adolescents overestimated their time spent on social media, but they more accurately estimated their time spent on platforms that are used in a less fragmented way (Instagram) than on platforms that are used in a more fragmented way (Snapchat). The between-person validity of adolescents’ time spent estimates according to retrospective surveys and ESM was sufficient (r ranged from .51 to .55). The accuracy of retrospective surveys increased over time (i.e., learning effect), while both the accuracy and validity of ESM decreased over time (i.e. fatigue effect).