title: Evaluating validity and test-retest reliability in four drive for muscularity questionnaires.
abstract: The current study assessed relationships among four commonly used drive for muscularity questionnaires, along with their 7 and 14 day test-retest reliability. Sample 1 was comprised of young British adult males (N=272; M(AGE)=20.3) who completed the questionnaires once. Sample 2, a group of young British adult males (N=54, M(AGE)=19.3), completed the questionnaires three times spaced 7 and 14 days apart. Correlations among Sample 1 ranged from .20 to .82 providing evidence for concurrent and discriminant validities. Evidence for test-retest reliability emerged with intraclass correlations ranging from .78 to .95 (p<.001) and generally nonsignificant t-tests (p>.05). Overall, the data support the psychometric properties of the drive for muscularity inventories; however, the shared variance (35-67%) hints that refinement is possible.
authors.affiliation: Department of Sport and Exercise Science, Aberystwyth University, Aberystwyth, United Kingdom. dvt@aber.ac.uk
authors.forename: David
authors.initials: D
authors.lastname: Tod
authors.forename: Todd G
authors.initials: TG
authors.lastname: Morrison
authors.forename: Christian
authors.initials: C
authors.lastname: Edwards
mesh_terms: D001824:Body Constitution; D001828:Body Image; D004328:Drive; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D009132:Muscles; D010555:Personality Inventory; D011594:Psychometrics; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires; D006113:United Kingdom; D055815:Young Adult