This document discusses psychological and social factors that influence consumer purchase behavior. It covers four key psychological influencers: motivation, perception, learning/attitudes/beliefs, and buying situation. Motivation is influenced by both stated and underlying motives, which can be explained by Maslow's hierarchy of needs. Perception is shaped by selective attention, distortion, and retention. Learning occurs through conditioning, social observation, and reasoning. Social factors include culture, social class, reference groups, family, and personal characteristics. The document provides examples and questions to help understand these concepts and their impact on marketing strategy.