Final answer:
B. F. Skinner proposed a behaviorist model of language acquisition, suggesting that language is learned through reinforcement or feedback. Noam Chomsky criticized Skinner's theory and proposed the concept of a language acquisition device (LAD) as a biological mechanism for language learning.
Step-by-step explanation:
B. F. Skinner proposed a behaviorist model of language acquisition, which suggests that language is learned through reinforcement or feedback. According to Skinner, children acquire language by receiving positive reinforcement or approval when they produce correct language forms. For example, if a child says 'me juice' and the mother gives him a cup of apple juice, the child is reinforced to use the correct grammar structure.
Skinner's model of language acquisition emphasizes the role of environment and external feedback in shaping language learning. However, Noam Chomsky criticized Skinner's theory and proposed that language acquisition is primarily guided by an innate capacity to learn language, known as the language acquisition device (LAD).
Researchers now believe that both nature and nurture play a role in language acquisition. They suggest that language acquisition is partially inborn and partially learned through interactions with the linguistic environment.