The document discusses various theories and models of motivation. It begins by defining motivation and examining the relationship between motivation and performance. It then outlines several need-based models of motivation including Maslow's hierarchy of needs, Herzberg's two-factor theory, and McClelland's acquired needs theory. Process models of motivation such as the expectancy model, equity theory, and goal setting are also summarized. The document concludes by examining contemporary approaches to motivation and prescriptions for improving motivation.