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English Language
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In the theoretical paradigms of second language acquisition, Noam Chomsky's nativist theory of language acquisition posits the existence of an innate mental faculty termed the Language Acquisition Device (LAD) and universal grammar, whereas Stephen Krashen's Monitor Model outlines five distinct hypotheses. Consider the following four advanced propositions regarding these linguistic and pedagogical theories: I. Chomsky's nativist hypothesis argues that human children are biologically pre-programmed with universal linguistic principles, enabling them to rapidly induce morphosyntactic structures from impoverished and degenerate primary linguistic input, a phenomenon known as the poverty of the stimulus. II. Krashen's Acquisition-Learning Hypothesis asserts that 'acquisition' is a subconscious process resulting from natural communication in the target language, whereas 'learning' is a conscious process of knowing about grammar rules, and crucially, explicit learned knowledge can readily transform into subconscious acquired competence over time with sufficient mechanical drill practice. III. Krashen's Affective Filter Hypothesis posits that emotional variables such as high anxiety, low self-confidence, and strong motivation can act as an adjustable mental screen that prevents incoming comprehensible input from reaching the language acquisition device, whereas a low affective filter facilitates optimal intake. IV. Krashen's Input Hypothesis (the $i+1$ formula) claims that acquisition occurs when a learner understands language input that contains linguistic structures slightly beyond their current level of competence ($i$), relying on contextual clues, extralinguistic information, and discourse background rather than structural sequencing. Identify the option that correctly evaluates the theoretical and conceptual validity of propositions I, II, III, and IV according to modern psycholinguistics and Second-language acquisition principles.
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Detailed Explanation
Proposition II is incorrect because Stephen Krashen's Monitor Model strictly maintains that *learned* knowledge and *acquired* knowledge are completely separate systems; explicit learned rules can *never* convert into subconscious acquired competence (known as the Non-Interface Hypothesis). Propositions I, III, and IV are entirely correct. Proposition I reflects Chomsky's nativist poverty-of-the-stimulus argument; Proposition III describes the affective filter variables; and Proposition IV accurately defines Krashen's $i+1$ comprehensible input principle. For a deeper understanding of these foundational concepts, consult the Second-language acquisition literature.
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