English: 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.
Ho: “Critical Period Hypothesis do ayarùtar 1959 re akinaḱ Sapagom “Speech and Brain Mechanisms” re Montreal ren neurologist Wilder Penfield„ co-author Lamar Roberts tekin propose let́a, oḍoḱ 1967 ren “Biological Foundations of Language” loḱ Eric Lenneberg popular ket́a.”