This research aimed to investigate whether: a) sport experience, coach/athlete sex and sex mismatch predicted athletes' perceptions of their coach's effectiveness on four dimensions of effectiveness, b) athletes' perceptions of coaching effectiveness differed between team and individual sports, and c) the four dimensions of coaching effectiveness were predicted by athletes' perceptions of conceptually related coach behaviors. Male (n=150) and female (n=147) athletes from team and individual

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... ts completed questionnaires assessing athletes' perceptions of their coach's effectiveness and behavior. Results revealed, a) sex predicted three dimensions of coaching effectiveness, such that perceptions of motivation, technique and character-building effectiveness were higher in females than males, b) perceptions of motivation, technique and character-building effectiveness were higher in individual-sport athletes than team-sport athletes, and c) all four dimensions of coaching effectiveness were predicted by conceptually related coach behaviors. This study identified a wide range of antecedents of coaching effectiveness, partially supports past research and provides support for the contention that athletes' perceptions of coaching effectiveness are based upon observations of coach behaviour.