Possession is not always the law: with age, preschoolers increasingly use verbal information to identify who owns what.

Children can identify owners either by seeing a person in possession of an object (a visual cue) and inferring that they are the owner or by hearing testimony about a claim of ownership (a verbal cue). A total of 391 children between 2.5 and 6 years of age were tested in three experiments assessing how children identify owners when these two cues are in conflict. Children were presented with stories using two dolls and a toy. One doll possessed the toy, and children were told that the toy was either the possessor's or the nonpossessor's. Two forms of ownership statement were used: a third-person statement, "That is Billy's ball", and a first-person statement by one of the dolls, "That is my ball". The results show that by 4 years of age, children prioritize the verbal statements as a more reliable cue to ownership than physical possession. Younger children did not prioritize possession over the verbal cue to ownership but rather gave mixed responses. These results are discussed in terms of children's social experience outside of the home and their acceptance of testimony in other domains.