Table 3.

Effect Size Estimates (d) for Significant Age Moderation Effects.

Outcome	ES for Contrast	Age group
		17–19.9	20–24.9	25–29.9	30+
		(n = 344)	(n = 201)	(n = 73)	(n = 59)
Eating disorder symptoms	Group vs. eBody Project (A×C)	−.21	−.18	−.36	.53
	Group vs. eBody Project (A×C×T)	.01	−.03	.17	−.71
BMI	Active vs. video control (A×C×T)	.02	.01	−.02	−.22
	Group vs. eBody Project (A×C×T)	−.01	.13	−.07	.44

Note. Sample sizes (n) refer to number of the total sample in each age group, not contrast specific sample sizes. Effects sizes for age × condition (A×C) interactions are Cohen’s d and computed as group difference in the outcome at posttest divided by the pretest pooled standard deviation and age × condition × time (A×C×T) effect sizes are equivalent to Cohen’s d and). Pooled standard deviations were computed separately within each age group.