Effect Sizes for Studies Included in the Meta-Analysis.

Nc = Number of participants in the control condition; Ne = Number of participants in the experimental condition; d+ = sample-weighted average effect size; 95% CI = 95% confidence interval.a Females.b Males.c Dance aerobics.d Step aerobics.e Video Intervention 1.f Video Intervention 2.g Cognitive-behavioural therapy (CBT).h Fitness training intervention.i Gratitude diaries.j Monitoring and restructuring.k High-risk women.l Low-risk women.m 3rd and 4th grade students.n 5th and 6th grade students.o Cycling.p Running.q Swimming.r Face-to-face intervention.s Internet intervention.t Feminist intervention.u Psychoeducation intervention.v Rosen, Orosan, & Reiter [76].w Rosen, Reiter, & Orosan [77].x Cognitive therapy.y To accommodate testing for two experimental conditions, the sample size of the control group has been divided by two.Measures of body image are coded as follows: 1 = Adult Body Satisfaction Questionnaire (ABSQ, [78]): Satisfaction with Physical Appearance Subscale; 2 = Body Attitudes Questionnaire (BAQ, [79]); 3 = Body Appreciation Scale (BAS, [80]); 4 = Body Checking Questionnaire (BCQ, [81]); 5 = Body Esteem Scale (BES, [82]); 6 = BES [82]: Sexual Attractiveness Subscale; 7 = Body Esteem Scale for Adolescents and Adults (BES, [83]): Appearance Body Esteem Subscale; 8 = BES [83]: Weight Body Esteem Subscale; 9 = Body Esteem Scale for Children [84]; 10 = Body Image Avoidance Questionnaire (BIAQ, [85]); 11 = Body Image Disturbance Questionnaire (BIDQ, [86]); 12 = Body Image States Scale (BISS, [87]); 13 = Body Parts Dissatisfaction Scale (BPDS, [88]): Number of Body Parts Wished Smaller; 14 = BPDS [88]: Number of Body Parts with Which Content; 15 = Body Parts Satisfaction Scale (BPSS, [89]): Body Parts Satisfaction Subscale; 16 = BPSS [89]: Overall Appearance Satisfaction Subscale; 17 = Body Satisfaction and Body Change Inventory (BSBCI, [90]): Body Satisfaction Subscale; 18 = Body Shape Questionnaire (BSQ, [91]); 19 = Body Shape Questionnaire- Short Form (BSQ-SF, [92]); 20 = Body-Self Relations Questionnaire (BSRQ, [93]): Appearance Evaluation Subscale; 21 = Berscheid, Walster, and Bohrnstedt Body Image Questionnaire [89]; 22 = Contour Drawing Rating Scale (CDRS, [94]); 23 = Child and Youth Physical Self-Perception Profile (CY-PSPP, [95]): Body Attractiveness Subscale; 24 = Eating Disorders Inventory–II (EDI-II, [96]): Body Dissatisfaction Subscale; 25 = Figure Rating Scale (FRS, [97]); 26 = Multidimensional Body-Self Relations Questionnaire (MBSRQ, [98]): Appearance Evaluation Subscale; 27 = MBSRQ [98]: Body Areas Satisfaction Subscale; 28 = Physical Appearance State and Trait Anxiety Scale (PASTAS, [99]: State Nonweight Subscale; 29 = PASTAS [99]: State Weight Subscale; 30 = PASTAS [99]: Trait Weight Subscale; 31 = Marsh Physical Self-Description Questionnaire (PSDQ, [100]); 32 = Physical Self-Perceptions-Inventory (PSPP, [101]): Bodily Attractiveness Subscale; 33 = Physical Self-Concept Scale (PSS, [102]): Perception of Appreciation of Physical Appearance Subscale; 34 = PSS [102]: Perception of Physical Appearance Subscale; 35 = Satisfaction with Body Parts Scale (SBPS, [89]); 36 = Self-Report Behavioral Avoidance Questionnaire [103]; 37 = Self-reported current weight = self-reported ideal weight; 38 = Situational Inventory of Body Image Dysphoria–Short Form (SIBID-S, [104]); 39 = Social Physique Anxiety Scale (SPAS, [105]); 40 = Self-Perception Profile for Adolescents [106]: Physical Appearance Subscale; 41 = State Self-Esteem Scale (SSES, [107]): Appearance Subscale; 42 = Visual Analogue Scales (VAS) to assess body satisfaction; 43 = VAS to assess feelings of beauty; 44 = VAS to assess muscle dissatisfaction [108]; 45 = VAS to assess weight dissatisfaction [108].Measures of beauty ideal internalisation are coded as follows: 1 = Questions about desire to look like TV and pop stars; 2 = Sociocultural Attitudes Toward Appearance Questionnaire (SATAQ, [109]): Internalization of the Thin Ideal Subscale; 3 = Sociocultural Attitudes Toward Appearance Questionnaire-III (SATAQ-III, [110]): General Internalization Subscale.Measures of social comparison tendencies are coded as follows: 1 = Body Comparisons Scale (BCS, [111]); 2 = Physical Appearance Beliefs Test (PABT, [112]): Social Comparisons Subscale; 3 = Physical Appearance Comparison Scale (PACS, [113]).Effect Sizes for Studies Included in the Meta-Analysis.