Communicative Mediation by Adults in the Construction of Symbolic Uses by Infants.

Adult semiotic mediation in the origin and evolution of the first symbolic uses of objects by infants in contexts of triadic interactions was investigated. Six infant-parent dyads interacting together with ten objects were observed longitudinally from 9 to 15 months of age, with an interval of three months between each observation. The communicative mediators used by adults, in the form of demonstrations and ostensive gestures, decrease as infants grow up. The orchestration of these semiotic mediators also decreases and the functions of the demonstrations change. At the beginning, the adults use them merely to demonstrate the symbolic uses of object, but later they use them to evaluate, complete or correct the symbolic uses by the infants. The semiotic mediators are first used to guide the child at the level of attention and later at the level of cultural practices of symbolic uses of objects. These changes in communicative mediators and their functions reveal the educational role of adults through adjustment in communication, always in tune with the infant's knowledge and performance.