In psychology and philosophy, theory of mind (often abbreviated to ToM) refers to the capacity to understand other people by ascribing mental states to them. A theory of mind includes the understanding that others' beliefs, desires, intentions, emotions, and thoughts may be different from one's own.[1] Possessing a functional theory of mind is crucial for success in everyday human social interactions. People utilize a theory of mind when analyzing, judging, and inferring others' behaviors.
Theory of mind was first conceptualized by researchers evaluating the presence of theory of mind in animals[2][3]. Today, theory of mind research also investigates factors affecting theory of mind in humans, such as whether drug and alcohol consumption, language development, cognitive delays, age, and culture can affect a person's capacity to display theory of mind. Having a theory of mind is similar to but not identical with having the capacity for empathy[4] or sympathy.
^Apperly IA, Butterfill SA (2009). "Do humans have two systems to track beliefs and belief-like states?". Psychological Review. 116 (4): 953–970. doi:10.1037/a0016923. PMID19839692.