Intervention Effectiveness on State Outcomes
Overall, the effectiveness of Gain score comparisons within cumulative analyses showed that state-based improvements in body satisfaction were particularly strong for videos 1 (setting the scene), 3 (targeting appearance-based comparisons), 5 (targeting self-body talk), and 6 (concluding the story), and for state mood, video 6. Interestingly, of the 4 videos targeting specific risk factors for body dissatisfaction (videos 2-5), the 2 that targeted internal cognitive changes were the most effective at generating state change in body satisfaction. This may be because participants felt they could take immediate control of their thought processes to combat these risk factors for body dissatisfaction (ie, they had learned how to stop the chain of comparisons and view their body more compassionately in the moment), whereas the skills learned in videos 2 (targeting media literacy) and 4 (targeting appearance-based teasing) may take longer to put into practice and benefit from. Video 6 was also particularly effective in improving body satisfaction and mood. This final video presents an alternative world to the dystopian future seen in video 1, where society lives free from appearance pressures owing to the everyday positive changes made by just one individual (ie, Putri). Therefore, it is perhaps unsurprising that this new reality boosts both body satisfaction and mood among the audience, as it showcases the impact of individual-level changes.It is noteworthy that we also found significant and progressive improvements in pre- and poststate body satisfaction scores for videos 1 to 6 (with a plateau between videos 4 and 5 for prevideo scores and a plateau between videos 3 and 4 for postvideo scores). Similarly, we observed a progressive increase in pre- and poststate mood scores, specifically between videos 1 and 3 for prevideo scores, which were maintained until video 6, and between videos 1 and 6, with a plateau between videos 3 and 5 for postvideo scores. A possible reason for the state score increases before each video could be that after watching the first video, participants felt progressively more invested in the narrative of 