CONCEPT
Theory of Mind
The capacity to attribute mental states—beliefs, desires, intentions—to others, enabling prediction and explanation of behavior and serving as the cognitive infrastructure for shared intentionality and cooperative communication.
Theory of mind is the ability to understand that other individuals have minds—that they possess beliefs that may be true or false, desires that may differ from one's own, and intentions that guide their behavior. This capacity, emerging in human children between ages three and five, is essential for navigating the social world. It enables deception, persuasion, teaching, and every form of interaction requiring the prediction of how another will think or act. In Tomasello's framework, theory of mind is not merely a social skill but the cognitive foundation of shared intentionality. To share goals with another requires representing the other's goals. To engage in cooperative communication requires modeling what the other knows and needs to know. Theory of mind makes collaboration possible by enabling each party to anticipate, coordinate with, and adjust to the mental states of their partners.
In The You On AI Field Guide
The classic test of theory of mind is the false belief task. A child watches