Theoretical Perspectives of Developmentt

1. Cognitive Developmentalist

1.1. Nature

1.2. Focus on Semantic and Morphemic Speech

1.3. Theorist: Jean Piaget

1.3.1. Object Permanence

1.3.2. Preoperational Stage

2. Behaviorist

2.1. Nurture

2.2. Focus is on Semantic, Syntactic and Morphemic Speech

2.3. Theorist: B.F. Skinner

3. Nativist

3.1. Nature

3.2. Focus on Syntactic Speech

3.3. Theorist: Noam Chomsky

3.3.1. Langugage Acquistion Device

4. Interactionist

4.1. Nurture

4.2. Focus on Pragmatic Speech

4.3. Theorist: Lee Vgyotsky