The correct answer is reference group
The individual's attitudes, behaviors and values are conditioned by the respective group of belonging (the family, the group of friends, etc.), which thus also assumes itself as a reference group (model group). However, there are situations where such a relationship appears "distorted" - this is the case, for example, of members of the upper classes with more radical ideologies.
Thus, it is essential to use the individual's reference group (which can be a group or an individual), which not only functions as a source of norms, values and attitudes (normative reference group, which can be positive or negative, of according to their (devaluation), as well as allowing comparisons to be made (comparative reference group, before which the individual perceives their degree of relative deprivation).