Table 4.

Comparison of Effect Sizes (Cohen's d) reflecting baseline to posttest change for the eBody Project and Body Project intervention in the present trial relative to the Efficacy Trial, a High School Effectiveness Trial, and College Effectiveness Trial, and two Sorority-led Trials.

	Thin-ideal internalization	Body dissatisfaction	Dieting	Negative affect	Eating disorder symptoms	M effect size
Pre to post within subjects comparison*
eBody Project	0.76	0.80	0.71	0.82	0.38	0.69
Body Project	0.86	0.76	0.59	0.44	0.43	0.62
Efficacy trial (Stice et al., 2006)	1.24	0.72	0.80	0.73	0.60	0.82
High School Effectiveness trial (Stice et al., 2009b)	0.71	0.52	0.62	0.50	0.47	0.56
College Effectiveness trial (Stice et al., 2011b)	0.76	0.85	0.73	0.54	0.51	0.68
Sorority-led groups Perez et al., 2010	0.61	0.37	0.29	N/A	0.22	0.37
Sorority-led groups Becker et al., 2010	0.79	0.46	0.56	0.45	0.47	0.55
Intervention condition vs. brochure control condition
eBody Project	0.63	1.32	0.69	0.72	0.39	0.75
Body Project	0.67	1.25	0.60	0.51	0.57	0.72
Efficacy trial (Stice et al., 2006)	0.82	0.75	0.56	0.49	0.34	0.59
High School Effectiveness trial (Stice et al., 2009b)	0.43	0.58	0.41	0.24	0.49	0.43
College Effectiveness trial (Stice et al., 2011b)	0.79	0.86	0.75	0.57	0.50	0.69

^*Note: Effect sizes were calculated as d = (post M- baseline M) / SD (baseline)