For decades, cognitive psychologists hypothesized that bilingualism confers a general executive function advantage, enhancing cognitive flexibility and working memory. Early studies frequently reported that bilingual individuals outperformed monolinguals on tasks requiring attention control. However, recent large-scale replication attempts have struggled to consistently reproduce these findings, with several studies showing no significant differences between the two groups. This discrepancy has led researchers to propose that the bilingual advantage may not be a universal phenomenon but rather one moderated by specific contextual factors, such as the age of acquisition and the degree of daily language switching.
Which choice best describes the function of the underlined sentence in the text as a whole?
- It introduces research findings that challenge the consensus described in the previous sentence, setting up the explanation proposed in the final sentence.Cevap
- BIt summarizes the passage as a whole by establishing a definitive conclusion that bilingualism does not affect cognitive flexibility.
- CIt details the specific experimental tasks and procedures that recent replication studies utilized to evaluate executive function.
- DIt speculates on the underlying neurological mechanisms that might explain why some bilingual individuals outperform monolingual individuals.