Decision theory refers to the field of study that is dedicated to making optimal choices in situations that involve uncertainty or limited information. There are several synonyms for this term that are used interchangeably depending on the context. One of the most common synonyms is "game theory," which emphasizes the strategic interaction between individuals or groups when making decisions. Another synonym is "choice theory," which focuses on the psychological and cognitive processes involved in decision-making. "Risk assessment" is a related term that is often used in the context of evaluating potential outcomes and identifying potential hazards or threats. Regardless of the specific term used, decision theory plays a critical role in many fields such as economics, psychology, and policy-making, among others.