Andrea S. Mendoza-Vasconez|Becky Marquez|Tanya J. Benitez|Bess H. Marcus
Psychometrics of the self-efficacy for physical activity scale among a Latina women sample
University of California, San Diego|San Diego State University|University of California, San Diego|University of California, San Diego|University of California, San Diego|Brown University|Providence College
even though latinos become priority population promotion physical activity united states several widely used scales physical activity promotion research validated among population particularly spanish study aims assess validity psychometrics selfefficacy physical activity scale among sample spanishspeaking latina women participated pasos hacia la salud intervention also explored alternatives scale simplification data 205 women corresponding baseline 6month 12month time points analyzed internal consistency assessed series spearman correlations ttests linear regressions logistic regressions used assess concurrent predictive validity self efficacy physical activity scale selfreport accelerometermeasured physical activity using continuous categorical outcome data item response theory factor analysis methods used explore alternatives simplify scale psychometric tests repeated simplified scale cronbachs alpha original scale 72 76 78 baseline 6month 12month data respectively concurrent validity tests conducted 6month 12month data baseline data statistically significant selfefficacy 6 months also predictive physical activity 12 months tests except one based plots option characteristic curves modified version scale created psychometric results modified scale similar original scale study confirmed scales reliability validity revealed scales accuracy improves response items collapsed important finding future research among populations low literacy levels