Development and Validation of the High Performance Volleyball Self-Efficacy Scale.

In this study, we aimed to develop and psychometrically examine a self-efficacy scale for high-performance volleyball athletes. A literature review and interviews with 16 experts led to construction of item content. A preliminary version of the scale was then administered to 24 high-performing adult athletes, followed by administration of the scale to 300 Brazilian high-performing volleyball athletes ( age = 24.