Young children's understanding of intention

Three studies were done to determine when children begin to understand people's intentions as mental-representational states (Searle's prior intentions) and as instantiated in purposive, goal-directed behaviors (Searle's intentions-in-action) that are distinguishable both from the people's desires or preferences and from the outcomes of the actions their intentions engender. Three- and four-year-olds were presented with stories in which the story characters' intentions differed both from their desires or preferences and from the outcomes of their efforts to carry out their intentions. The 3-year-olds, especially the younger ones, showed little ability to distinguish intentions from desires and outcomes. In contrast, most of the 4-year-olds were able to make these distinctions consistently. These and other recent differential studies suggest that children begin to develop a differentiated conception of intention at around 3 1/2 or 4 years of age.