Reinforcement Sensitivity Theory (RST)

Reinforcement sensitivity theory (RST) is a psychological framework used by researchers to explain differences in motivation, emotional reactivity, and behavioral patterns. Developed by psychologist Jeffrey Gray, RST measures how we respond to reward/punishment and how these responses guide our approach toward reward and avoidance of threat. Also see Reward Sensitivity. The primary systems are:

• Behavioral Approach System (BAS), which regulates movement toward goals and rewarding stimuli
• Behavioral Inhibition System (BIS), which regulates responses to uncertainty and potential punishment
• Related threat-detection systems described in later revisions of the theory