Theory of mind is the ability to attribute mental states—beliefs, intents, desires, pretending, knowledge, etc.—to oneself and others and to understand that others have beliefs, desires and intentions that are different from one’s own.
Theory of mind is a theory insofar as the mind is not directly observable. The presumption that others have a mind is termed a theory of mind because each human can only intuit the existence of his or her own mind through introspection, and no one has direct access to the mind of another. It is typically assumed that others have minds by analogy with one’s own, and based on the reciprocal nature of social interaction, as observed in joint attention, the functional use of language, and understanding of others’ emotions and actions. Having a theory of mind allows one to attribute thoughts, desires, and intentions to others, to predict or explain their actions, and to posit their intentions. As originally defined, it enables one to understand that mental states can be the cause of—and thus be used to explain and predict—others’ behavior. Being able to attribute mental states to others and understanding them as causes of behavior implies, in part, that one must be able to conceive of the mind as a “generator of representations”.
The “False Belief Task”
A more focused perspective on TOM comes from developmental psychology. Children show a precocious ability to understand intentions and other important aspects of the mind (as gaze direction, attention, pretense). Nevertheless, in the early 80, the psychologists H. Wimmer and J. Perner showed that a full-fledged TOM doesn’t develop before the age of 3/4. They set up a series of experimental tests in order to check whether children between 3 and 5 years of age were able to attribute a false belief to someone else. In one of these experiments, children see a scene in which a character, Maxi, puts chocolate in a drawer and goes away. While he is away, his mother takes a bit of chocolate for cooking and then puts it somewhere else and goes out. Then Maxi comes back, and the experimenter asks: “Where will Maxi look for the chocolate?”. The 1983 original results showed that children over 5 did not have problems in attributing to Maxi a false belief, whereas younger children predicted indifferently that Maxi could look for the chocolate where his mother has put it. Further experiments lowered the threshold of attributing false beliefs to 3/4 years of age.
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