The Intentionality Model builds on the child's engagement in a world of persons and objects, the effort that learning language requires, and the essential tension between engagement and effort that propels language acquisition. According to this perspective, children learn language in acts of expression and interpretation; they work at acquiring language; all aspects of a child's development contribute to this process.

• Provides results of a longitudinal study which examined language acquisition in the second year of life in the context of developments in cognition, affect, and social...