Sheldrick (2004) examined the relationship between psychopathy and centrality within informal peer groups and failed to find a linear relationship. This variation suggests that there may not be a typical developmental trajectory, in that psychopathic traits either lead to rejection by peers or allow these children and adolescents to excel at charming their way into peer groups. Sheldrick (2004) also found that the more psychopathic traits a child exhibited, the less susceptible they were to peer-pressure.