Examining Between- and Within-Subjects Effects of Posting and Exposure to Alcohol-Related Social Media Content on Drinking Over Time

Results suggest that the relationship between alcohol consumption and alcohol posting (self and ARC exposure) is complex and not necessarily bidirectional, with associations between posting and drinking fluctuating within subjects, whereas between- and within-subjects associations were observed for exposure and drinking. Associations between posting and drinking vary within individuals over time, whereas associations between exposure and drinking exist for groups, indicating that the more people are exposed, the more alcohol they consume.