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Evaluating validity and test-retest reliability in four drive for muscularity questionnaires
Journal article   Peer reviewed

Evaluating validity and test-retest reliability in four drive for muscularity questionnaires

David A Tod, T G Morrison and C Edwards
Body Image, Vol.9(3), pp.425-428
2012
DOI: https://doi.org/10.1016/j.bodyim.2012.02.001
url
https://doi.org/10.1016/j.bodyim.2012.02.001View
Published Version

Abstract

body image concurrent validity discriminant validity drive for muscularity psychometrics test-retest reliability
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. © 2012.

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