Social media, body image, and the question of causation: Meta-analyses of experimental and longitudinal evidence

This article presents four meta-analyses that can inform causality in the relationship between social media and body image; 24 experimental samples comparing the effect of appearance-ideal social media images to non-appearance-related conditions (n = 3816); 21 experimental samples examining the effect of contextual features (e.g., comments and captions) accompanying appearance-ideal social media images (n = 3482); 14 experimental samples investigating the effect of appearance-ideal images versus other appearance images on social media (n = 2641); and 10 longitudinal samples on social media use and body image (n = 5177). Social media appearance-ideal images had a moderate negative effect on body image (Hedges' g = -0.61, p < .01), were more damaging in higher- than lower-risk contexts (Hedges' g = -0.12, p < .01), and were moderately more impactful than other social media appearance images (Hedges' g = -0.68, p = .05). These effects were smaller but significant with outliers removed. Social media use had a very small, negative correlation with body image longitudinally (Fisher's Z = -0.08, p < .001). No significant moderators emerged. Clinicians should consider approaches to managing social media use, particularly exposure to appearance-ideal imagery, in case conceptualisation and psychoeducation for clients at risk of, or experiencing, body image disturbance.