Final answer:
The evidence against behaviorist theories of language development includes the selective nature of parental feedback, the focus on correcting factual errors over grammatical ones, and the debate about the concept of universal grammar.
Explanation:
Evidence against behaviorist theories of language development:
- Parents are more likely to correct factual errors, not grammatical errors, showing that feedback is not solely based on reinforcement for correct grammar.
- Parents do not always correct everything children say, indicating that feedback provided is selective and not constant for all utterances.
- There is a debate about the existence of universal grammar, challenging the behaviorist idea that all language learning is solely based on environmental interactions.
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