This document discusses emotions and moods. It defines affect, emotions, and moods, noting that emotions are intense feelings directed at something, while moods tend to be less intense and lack a stimulus. It explores aspects of emotions like biology, intensity, frequency and duration. It discusses basic positive and negative moods and various sources that can influence emotions and moods, such as personality, time of day, stress, social activities, sleep, exercise, age, and gender. It also covers external constraints like organizational and cultural influences. The document concludes with applications of emotions and moods in organizational behavior, such as selection, decision making, creativity, motivation, leadership, and customer service.