Muñoz et al. (2008) also identified the presence of at least one friend from school as a protective factor. Adolescents with at least one school friend decreased their delinquent behavior and psychopathic traits over a period of time. This suggests that school friends may be a protec- tive factor for adolescents who demonstrate psychopathic traits; however, this has not been examined across different types of environ- ments. Barry et al. (2008) also found support for this in younger children, as psychopathic traits decreased over time in children with higher social competence.