In health communication, social cognitive theory has been applied in research related to smoking cessation, HIV prevention, safe sex behaviors, and so on. For example, Martino, Collins, Kanouse, Elliott, and Berry in 2005 examined the relationship between the exposure to television’s sexual content and adolescents’ sexual behavior through the lens of social cognitive theory, confirming the significant relationship between the two variables among white and African American groups; however, no significant correlation was found between the two variables in the ethic group of Hispanics, indicating that peer norm could possibly serve as a mediator of the two examined variables.