The similarity attraction paradigm states that humans are attracted to those others that possess similar characteristics (Berscheid & Walster, 1978).
Individuals with similar characteristics tend to possess similar views and opinions and through their interaction,
they communicate evaluative statements and sentiments that assure, support, and justify each others' views as valid and meaningful, which represents a powerful reinforcer (Kelley, 1979; Newcomb, 1953).
Being confirmed that her/his viewpoints are “correct” reinforces the individual's sense of competence (Tedeschi & Lindskold, 1976).