The document discusses several key concepts related to interpersonal attraction and close relationships, including: 1. Interpersonal attraction depends on the evaluator, similarities/differences between people, and the context of their interaction. Building close relationships fulfills needs for affiliation, intimacy, and emotional support. 2. Loneliness and social anxiety can block relationship formation. Attachment styles are influenced by early relationships. Reward and reinforcement theories explain attraction. 3. Factors influencing attraction include proximity, similarity, complementarity, competence, physical attractiveness, reciprocity, and self-disclosure. Relationships are evaluated using a social exchange theory framework. 4. Intimacy has physical, intellectual, and emotional dimensions and is