Assertion: critical period hypothesis | /r/HasProperty | proposed by co-author lamar roberts
Facets:
value: in their 1959 book speech
type: TEMPORAL
value: in brain mechanisms
type: OTHER
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.