Factors that increase friendship Ben Franklin Effect: after helping another person we like them more. Contact Hypothesis: bringing enemies together leads towards friendship. Dilution Effect: information about others reduces stereotyping. Empathy-Altruism Hypothesis: if we feel empathy we are likely to help. Friendship: there are several factors that increase chances of friendship. Law of Attraction: similar attitudes leads to friendship. Matching Hypothesis: romantic partners tend to be similarly attractive. Mere Exposure Theory: exposure to people increases liking. Propinquity Effect: meeting and interacting increase chance of friendship. Reinforcement-Affect Theory: both forms of conditioning leads us to like others. Repulsion Hypothesis: we prefer those with similar attitudes (and vice versa).