Group dynamics refers to the interactions that take place among members of a group. There are three views on the nature of group dynamics: normative, techniques-based, and internal processes. Groups form through propinquity, similar attitudes, and reward-cost equations. Formal groups are formed by organizations while informal groups emerge among employees. Highly cohesive groups can positively or negatively influence performance. Groups develop through forming, storming, norming, performing, and adjourning stages. Group structure and processes shape member behavior and performance.