The purpose of the present study was to determinethe effect of coaching behaviors on coaching efficacy and team dynamic of vollyball pro- league in Iran (2009). 160 athletes and coach from 13 team participated as samples in this study. Coacing behavior was measured by Martin, S.B., & Barnes, K. (1999) Coaching Behavior questionnaire. Coaching Efficacy was measured by Feltz, D.L., Chase, M.A, Mo...