Questions on first language acquisition

Roger Brown studied how toddlers acquire language and found they go through stages of development. Children learning to ask questions shows the process of language acquisition. Metalinguistic awareness is understanding language as an object. Behaviorism explains language acquisition through conditioning and reinforcement but does not fully account for it. Innatism and interactionism-developmentalism both see innate language abilities developing through experience, differing on the influence of environment, with the Critical Period Hypothesis stating a limited window for language acquisition. Piaget and Vygotsky differed on the roles of social interaction and individual development in language learning.