Evaluation models are being developed to comprehensively evaluate coaching effectiveness (Gilbert & Trudel, 1999; Mallett & Côté, 2006), but few researchers have empirically validated coaching intervention programs. The purpose of the current study was to examine the impact of a coaching intervention on athletes’ satisfaction, enjoyment, self-confidence, and intrateam attraction and their perceptions of their coaches’ socio-emotional behaviors following Mallett and Côté’s (2006) evaluation model. Nine boys’ high school soccer coaches and their respective teams were randomly placed in a control, feedback, or educational group. Using 3 (treatment) x 2 (time) MANOVAs, significant interactions were found for the coach-athlete relationship subscales and psychosocial variables. Post-hoc tests revealed significant results for caring coaching behaviors and athlete self-confidence over time as well as a significant improvement over time for athlete intrateam attraction.