研究以英汉双语者为被试，考察任务切换和抑制控制对双语者口语产出的影响。结果显示：1)双语者在非切换条件下口语产出的复杂度、准确度和流利度均高于切换条件；2)出现非对称性切换代价，切换条件下双语者汉语口语产出复杂度、准确度和流利度的受损要比英语口语的更大；3)抑制控制能力对口语产出影响呈非对称性，汉语口语产出较之英语口语受影响更大。研究结果表明任务切换和抑制控制能力对双语者口语产出影响显著。

The current study aims to examine the effects of task switch and inhibitory control on bilinguals’ Chinese and English speech production by investigating language switching between picture-description tasks. The results show: 1)in non-switch condition, complexity, accuracy and fluency of bilinguals’ Chinese and English speech production were all better than those in switch condition; 2)asymmetrical switch cost was obtained that in switch condition, Chinese and English bilinguals’ Chinese speech complexity, accuracy and fluency suffered more than their counterparts in English speech production; 3)An asymmetrical impact was also found that inhibitory control might exert more impact on Chinese speech production than did it on English speech production. These results demonstrate that task switch and individual inhibition ability have a significant impact on Chinese and English speech production.