The strongest evidence for a critical period for human language development is the ____.
A) exceptional language abilities of children with Williams syndrome
B) different lateralization of first language and second language
C) differences in language between Broca's aphasia and Wernicke's aphasia
D) difficulty deaf children have learning sign language if they start late

Question

Quizplus · Accepted Answer

The difficulty deaf children have learning sign language if they start late suggests that there is a critical period for language acquisition, as they are not able to acquire the language as easily or fully as those who start learning at a younger age. This supports the idea that there is a limited window of time in early childhood during which language development is most successful. None of the other options directly relate to the concept of a critical period.

The Strongest Evidence for a Critical Period for Human Language