title: Affective judgment and physical activity in youth: review and meta-analyses.
abstract: BACKGROUND
  A recent meta-analysis on affective judgment and physical activity in adults yielded a medium effect-sized relationship. Despite narrative reviews and topic interest, a meta-analysis in youth has not yet been conducted.
  
  
  OBJECTIVE
  This study aims to appraise the overall effect of affective judgment on physical activity in youth via meta-analyses and explore moderators of this relationship.
  
  
  METHODS
  Literature searches were conducted between 1990 and 2011. Fixed and random effects meta-analysis with correction for sampling, measurement, and publication bias were employed.
  
  
  RESULTS
  Fifty-six correlational studies and 14 interventions met the inclusion criteria. Among correlational studies, the corrected summary r was 0.26 (95 % CI 0.18-0.32). Significant moderators were gender, measure of physical activity, and recruitment context. Among intervention studies, Cohen's d was 0.25 (95 % CI 0.11-0.40).
  
  
  CONCLUSIONS
  The results are close to a medium effect size which is larger than other meta-analytic physical activity correlates among youth. The construct should be included in our contemporary theories for understanding and intervening upon youth physical activity.
authors.affiliation: Behavioral Medicine Laboratory, School of Exercise Science, Physical & Health Education, University of Victoria, Victoria, BC, Canada. gnasuti@uvic.ca
authors.forename: Gabriella
authors.initials: G
authors.lastname: Nasuti
authors.forename: Ryan E
authors.initials: RE
authors.lastname: Rhodes
mesh_terms: D000293:Adolescent; D000339:Affect; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007600:Judgment; D007899:Leisure Activities; D008297:Male; D009043:Motor Activity