在過去的25年裡，第二外語(L2)學習者口語焦慮與口說成效之間的關係一直是學術界研究的一個重要課題。然而，這一領域之前的研究結果並不一致，一些研究報告稱第二外語學習過程中的焦慮會損害學習者的口說成效，而另一些研究則認為口語焦慮與口說成效之間沒有顯著的相關性。在文獻中缺乏共識結論，因此希望透過本論文分析口語焦慮和口說成效之間關係。
本論文進行了嚴格的統合分析(Meta-Analysis)，採用全面的文獻檢索，確定了1986年至2021年間發表的38項相關主要研究。這些研究共包含67個獨立的效應量進行分析，總共有5049名參與者。統合分析採用穩健的統計技術來確定第二外語學習者口語焦慮與口說成效之間的相關性的存在和程度。
統合分析結果顯示，口語焦慮與口說成效程度呈中度負相關(r = -)，表明第二外語學習者的口語焦慮水準越高，其口語熟練程度越低。越來越多的文獻表明，口語焦慮可能對第二外語學習者口語能力的發展產生不利影響，本論文分析結果進一步證明了這一點。

Over the past two and a half decades, the relationship between speaking anxiety and communicative competence in second language (L2) learners has been a topic of considerable academic investigation. However, the findings from previous studies in this area have been inconsistent, with some studies reporting that anxiety in the L2 learning process impairs L2 learners' speaking proficiency, while others suggesting no significant correlation between speaking anxiety and speaking proficiency. This lack of consensus in the literature has led to a pressing need to clarify the nature of the relationship between anxiety and L2 speaking performance.
To address this issue, a rigorous meta-analysis was conducted, employing a comprehensive literature search that identified 38 relevant primary studies published between 1986 and 2021. These studies encompassed a total of 67 independent effect sizes for analysis, with a combined sample size of 5,049 participants. The meta-analysis employed robust statistical techniques to determine the presence and extent of the correlation between speaking anxiety and speaking performance in L2 learners.
The findings of the meta-analysis revealed a moderately negative relationship between speaking anxiety and speaking proficiency (r = -.26, 95% CI: [-.32, -.20]), indicating that higher levels of speaking anxiety tend to be associated with lower levels of speaking proficiency in L2 learners. This result adds to the growing body of literature suggesting that speaking anxiety may have a detrimental impact on the development of speaking proficiency in L2 learners.

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