國小教甄｜英語英語科專門類科知能114 年第 23 題單選題考點：Multiple Sensitive Periods考點：Critical Period Hypothesis
Which of the following best describes the relationship between sensitive or critical periods and language acquisition?
AThere may be different sensitive or critical periods for different types of language skills.正確答案
BSensitive or critical periods dictate that language acquisition is impossible after a certain age.
CSensitive or critical periods refer to times when individuals are more likely to lose language abilities.
DThe brain's ability to acquire language peaks during the teenage years, making it the best time to learn a new language.
A正確答案
關鍵期假說認為語言學習有最佳年齡段，且不同語言技能（如發音、語法、詞彙）的敏感期長短與結束時間各不相同，並非單一時間點切斷。
逐選項解析
AThere may be different sensitive or critical periods for different types of language skills.Multiple Sensitive Periods✓ 正確
正確。語言學界普遍認為，不同語言層面有不同的敏感期。例如「語音（發音）」的敏感期最早結束（約6-8歲），而「語法」較晚，「詞彙」則幾乎終身都可以學習。
BSensitive or critical periods dictate that language acquisition is impossible after a certain age.Critical Period Hypothesis✕ 易錯陷阱
錯誤。陷阱在於「impossible（不可能）」。過了關鍵期或敏感期後，學習第二語言會變得困難，且難以達到「母語人士（native-like）」的水平，但絕對不是「不可能」學會。
CSensitive or critical periods refer to times when individuals are more likely to lose language abilities.✕ 錯誤
DThe brain's ability to acquire language peaks during the teenage years, making it the best time to learn a new language.✕ 錯誤
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