1. a method of teaching individuals to change verbal and nonverbal signals and behavioral patterns and to enhance interpersonal communication generally through techniques designed to help them express emotions, opinions, and preferences—positive and negative—clearly, directly, and in an appropriate manner. Role play or behavior rehearsal is often used to prepare clients to be appropriately assertive in real-life situations.

2. in sport, the use of specific drills that have the purpose of increasing the physicality of play within the rules.