A full topic summary of the relationships topic in psychology. Includes detailed notes and strong evaluative points on evolutionary explanations, physical attractiveness, social penetration theory, social exchange theory, equity theory, self-disclosure, filter theory, Rusbult's investment model, Duck's phase model, and virtual and parasocial relationships. Notes are colour coded- key terms in blue, key researchers in bold, positive evaluations in green and negative evaluations in red. Notes a...