A set of new scales measuring self- and collective efficacy beliefs in sports.

Aim of the study is to present six new scales aimed to measure self- and collective efficacy beliefs in three sports: basket, soccer, and athletics. A large group of basket and soccer players, and athletes filled in the new scales measuring seven dimensions of personal efficacy and four dimensions of collective efficacy; questionnaires measuring motivational orientation and team cohesion were also administered. Results demonstrated the good psychometric properties of the scales as well as significant differences due to sex and seniority. Furthermore, athletes’ self-efficacy beliefs positively correlated with achievement motivation, whereas their collective efficacy beliefs were associated with team cohesion