In Study 1, participants formed false stereotypes about two groups, the Ackmians and the Orinthians, based on their assigned roles, even when the groups were described as having the same personality traits. Additionally, providing explanations for the role distribution reinforced these stereotypes, with stronger effects observed when the groups were described as different species rather than different sub-cultures within a single species. Sex differences, although important, are not required for the formation of stereotypes, as stereotypes can generalize to individuals who do not conform to traditional gender roles, leading to intrinsic, category-wide stereotypes. Once stereotypes are established, perceivers may interpret role-based differences in behavior as confirmation of these stereotypes, reinforcing their beliefs about group characteristics