Without the models of psychologists like Vealey and Bandura, we would not understand how important self-confidence is to guarantee a high level of performance in sport. Bandura's four-component model appears to be the most supported and accredited model. His model also helps coaches and teachers understand how they can help their athletes achieve a higher level of performance by helping them increase their level of self-efficacy. Vealey proposes a virtuous two-component model, however, the only evidence that was obtained, in support of the theory, was conducted by Vealey herself, which could mean that there was a high level of bias as Vealey would have wanted the results confirmed her theory in making her seem like a better psychologist. To conclude, both theories have had a fundamental impact on our understanding of self-confidence and sports performance, but Bandura's self-efficacy has had a greater impact as it has more supporting evidence and can be applied to more areas of performance compared to that of Vealey.