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Related Experiment Videos

Physical Self Description Questionnaire: stability and discriminant validity

H W Marsh1

  • 1Faculty of education, University of Western Sydney, Campbelltown, New South Wales, Australia. h.marsh@uws.edu.au

Research Quarterly for Exercise and Sport
|September 1, 1996
PubMed
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The Physical Self-Description Questionnaire (PSDQ) demonstrates good internal consistency and stability over time for measuring physical self-concept in adolescents. Its validity is supported by confirmatory factor analysis multitrait-multimethod models.

Area of Science:

  • Psychology
  • Sport and Exercise Science
  • Measurement and Evaluation

Background:

  • Physical self-concept is crucial for adolescent development.
  • The Physical Self-Description Questionnaire (PSDQ) is a multidimensional instrument assessing various physical attributes.
  • Previous research has established the PSDQ's relevance in different populations.

Purpose of the Study:

  • To evaluate the psychometric properties of the Physical Self-Description Questionnaire (PSDQ) in a high school population.
  • To assess the internal consistency and temporal stability of the PSDQ scales.
  • To examine the construct validity of the PSDQ using confirmatory factor analysis (CFA) multitrait-multimethod (MTMM) models.

Main Methods:

  • High school students completed the PSDQ on four occasions over 14 months.

Related Experiment Videos

  • Internal consistency was assessed using Cronbach's alpha.
  • Test-retest reliability was calculated for different time intervals.
  • Confirmatory factor analysis (CFA) multitrait-multimethod (MTMM) models were employed to evaluate discriminant and construct validity.

    • Main Results:

    • The PSDQ exhibited good internal consistency across all 11 scales (median alpha = .92).
    • Temporal stability was strong, with median correlations ranging from .83 (3 months) to .69 (14 months).
    • CFA MTMM models supported the discriminant validity of PSDQ scales and construct validity when augmented with cardiovascular endurance tests.

    Conclusions:

    • The PSDQ is a reliable and valid instrument for measuring physical self-concept in adolescents.
    • The study provides robust evidence for the construct validity of PSDQ responses.
    • The findings support the use of CFA MTMM models in validating self-concept measures.