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Psychometric Evaluation of Three Psychosocial Measures Associated With Physical Activity Among Adolescent Girls

Year: 2016

Type: article

Abstract: The purpose of this study was to evaluate the psychometric properties of a Perceived Benefits Scale, a Perceived Barriers Scale, and a Physical Activity Enjoyment Scale with data from a group randomized controlled trial (RCT) and a test-retest study with 1-week interval. In the group RCT at baseline and Week 17, 1,012 fifth- to eighth-grade girls completed an iPad-delivered survey and wore 7-day accelerometers measuring moderate-to-vigorous physical activity (MVPA). In the test-retest study, 91 fifth- to seventh-grade girls completed the iPad-delivered survey at Times 1 and 2. Benefits, barriers, and enjoyment scales had Cronbach's αs of .75, .86, and .78 and test-retest reliability of .83, .88, and .79, respectively. Benefits Scale had a two-factor structure (physical and psychosocial benefits), while the remaining two had a one-factor structure indicating construct validity. Barriers ( r = -.16) and enjoyment ( r = .17) were correlated with MVPA indicating concurrent validity. Baseline MVPA and psychosocial benefits positively, while physical benefits negatively, predicted MVPA at Week 17 indicating predictive validity. The measures demonstrated satisfactory psychometric properties.

Source: The Journal of School Nursing

DOI: 10.1177/1059840516685857

Authors: Jiying Ling, Lorraine B. Robbins

Institution: Michigan State University

Language: English

Topic: Physical Activity and Health

Subfield: Physiology

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: green

Funders: Michigan State University, National Heart, Lung, and Blood Institute