Assertion: critical period hypothesis | /r/HasProperty | popularized by eric lenneberg
Facets:
value: with biological foundations of language
type: OTHER
value: in 1967
type: TEMPORAL
Source sentences:
text: The critical period hypothesis was first proposed by Montreal neurologist Wilder Penfield and co-author Lamar Roberts in their 1959 book Speech and Brain Mechanisms, and was popularized by Eric Lenneberg in 1967 with Biological Foundations of Language.