Introduction: One of the most important aspects of interpersonal affecting the performance of athletes is self-efficacy (Hodges, 2004, sanati monfared1386). According to Bandura's view, the environment and individual have mutual influence on behavior. In this view, a person's behavior is influenced by social forces, but how to deal and how to affect on the social forces is at the disposal of the individual. Self-efficacy is referred to people judgement on their abilities to perform a function or adapt a particular situation. Self-efficacy believes are determinant about the extent of spending energy and how much resist in front of obstacles. According to this view, efficacy of each person is affected by environmental conditions and their behavior (P, 1390).
Methodology: The study aimed to determine the relationship between self-efficacy of karate girls with their athletic performance. This is a correlational study. Population of the study consisted of all karate girl trainees of 18 to 30 years old in Tabriz who doing Karate in Karate institutions. 258 athletes were selected by cluster random sampling. The data were collected via athlete General Self-Efficacy Scale (GSES) and researcher made of sport function checklist. The data were analyzed by SPSS.21 and statistical methods of Spearman coefficient correlation, stepwise regression analysis and Kruskal Wallis. Results of the study demonstrated that there is positive correlation between self-efficacy (effort, initiative, persistence) and athletic performance r=0.37 to r=0.55 (P<0.01). There is't relationships between age with athletes performance (P>0.05). According to findings of this study, self-efficacy of karate girls is the predictor of athletic performance.
Conclusion: According to research, between self-efficacy (effort, initiative, persistence) and athletic performance, there is a positive correlation. Also, it has been emphasized in various previous reports on the positive relationship between self-efficacy and athletic performance..