The capacity to predict and interpret behavior by using representations of hidden, causally efficacious mental states, Support for the constructivist view comes from evidence that theory-of-mind development is influenced by both social experience and language. For instance, having older siblings tends to lead to earlier success on the false-belief task, as do greater amounts of parental mental-state discourse . Strikingly, deaf children who do not learn sign language until later in life also have persistent difficulties on the false-belief task, even in adulthood . For the original view, a large body of evidence has emerged recently, demonstrating a range of theory of mind abilities in children in the first two years of life, before they pass through verbal forms of false belief. a task. For example, a number of studies have adapted the classic false belief task to make it appropriate for infants. Currently, these tasks never ask children to make explicit verbal predictions