1. Cognitive Developmentalist
1.1. Jean Piaget
1.1.1. Focus is on nature
1.1.2. Cognitive development is the foundation for language development
1.1.3. Children learn language as they go through different cognitive stages
1.1.4. Focuses on development of schemata and the manipulation of symbols
2. Interactionist
2.1. Lev Vygotsky
2.1.1. Focuses on sociocultural interaction
2.1.1.1. New node
2.1.2. Children develop language through attempts to communicate with people around them
2.1.3. Emphasis is on language development process rather than language as a product of development
2.1.4. Children develop awareness of communicative functions before they are able to actually talk
3. Behaviorist
3.1. B. F. Skinner
3.1.1. Emphasizes the role of nurture
3.1.2. Learning is based on elements of child's environment
3.1.3. Language is learned as result of child's response to environmental associations
3.1.4. Children are encouraged to learn speech by imitation and repetition
4. Nativist
4.1. Noam Chomsky
4.1.1. Emphasis of learning and language development is on nature
4.1.2. Focus is on obtaining syntactic language
4.1.3. Language is seen as an instinct
4.1.4. Children learn language by discovering the structure of their language