Survey Development
This study employed a 30-item questionnaire designed to measure preadolescent psychosocial correlates of PA, Extracurricular PA Participation, and Intention to Be Physically Active. Two-items on the questionnaire measured Extracurricular PA Participation; one-item reflecting participation in FC and one-item reflecting participation in an organized PA outside of school. The other 28 items on the questionnaire were adopted from the psychosocial correlates of PA instruments developed by Saunders et al. (1997) based on the TRA and SCT. Five items were taken from the Social Influences Scale, 15 from the Self-Efficacy Scale and eight from the Beliefs Scale. Of the 15 Self-Efficacy Scale items, four items measured Self-Efficacy for overcoming barriers to PA, six items measured Self-Efficacy Social Support, and four items measured Self-Efficacy Alternative Activity. Five of the eight Beliefs Scale items measured Physical Outcomes while three items measured Social Outcomes. One item on the questionnaire, also drawn from Saunders et al. (1997), assessed preadolescent Intention to Be Physically Active. This item used a five-point scale. The remaining 29 items on the questionnaire used a dichotomous (yes or no) scale. See Appendix B for a copy of the study questionnaire.