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Permanent link (DOI): https://doi.org/10.7939/R3Q414

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Development of a General Measure of Physical Self-Concept of Muscularity Open Access

Descriptions

Other title
Subject/Keyword
psychometrics
muscularity
physical self-concept
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Loitz, Christina C
Supervisor and department
Rodgers, Wendy (Physical Education and Recreation)
Examining committee member and department
Wild, Cameron (Public Health)
Dunn, John (Physical Education and Recreation)
Crocker, Peter (Kinesiology)
Rodgers, Wendy (Physical Education and Recreation)
Berry, Tanya (Physical Education and Recreation)
Department
Physical Education and Recreation
Specialization

Date accepted
2012-08-13T09:05:03Z
Graduation date
2012-11
Degree
Doctor of Philosophy
Degree level
Doctoral
Abstract
The purposes of this dissertation were to (a) develop an instrument that assess the physical self-concept of muscularity among young adults, (b) produce content validity, internal structural validity and external criterion-related validity evidence to support the new instrument, and (c) develop internal consistency and stability evidence supporting the new instrument. Physical self-concept and body image research generally focuses on body-fatness, but since the 1990s, perceptions of muscularity have been a growing concern for some men and women (McCreary & Sadava, 2001; McCreary & Sasse, 2000; Olivardia et al., 2004; Pope et al., 2000). Currently, self-concept of muscularity measures use silhouettes that show inconsistent validity and reliability (Cafri & Thompson, 2004). The two most popular physical self-concept instruments (Physical Self-Perception Profile, Fox & Corbin, 1989; and Physical Self-Description Questionnaire, Marsh, Richards, Johnson, Roche, & Tremayne,1994) do not include a measure of muscularity. The first study in this dissertation assessed the content relevance and representativeness of the new instrument based on ratings provided by an expert panel of academics. The second study assessed the content relevance and representativeness of the new instrument based on ratings provided by a panel of fitness experts. The third study assessed the internal structural validity of the instrument using exploratory factor analysis. The fourth study assessed the internal structural validity using exploratory factor analysis, criterion related validity (external variables included body mass index, physical activity level, exercise participation, exercise identity, drive for muscularity and drive for thinness) and internal consistency reliability and stability over a one-week time period. The validity evidence presented in this dissertation provides support for the general physical-self concept scale which includes the self-concepts of muscle-tone, muscle-bulk, muscle-strength and body-fat. The distinction of muscle-tone relative to muscle-bulk and body-fatness requires future work to improve the conceptual clarity of these constructs.
Language
English
DOI
doi:10.7939/R3Q414
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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