Studies in Second Language Acquisition was first published in 1978.

Yes, second language acquisition is fundamentally different from first language acquisition. In first language acquisition, children acquire language naturally and effortlessly through exposure and interaction with their environment. In second language acquisition, however, learners are consciously and intentionally acquiring a new language, often in an instructional setting, which involves different cognitive processes and strategies.

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The term "language acquisition" refers to the way in which humans learn languages. The ability to use and comprehend language is unique to humans. There are three main theories of language acquisition.

The two main methods of language acquisition are innate language acquisition, which is language development that occurs naturally through interactions with caregivers, and formal language acquisition, which involves deliberate instruction and learning in a structured setting like a classroom. Both methods play important roles in the development of language skills.