By controlling cognitive focus,the study investigated effects of three cognitive tasks,which were memory,imagination of synonym(or antonym)and justification of word phoneme, on memory for speech words in single versus double sources.

• 该项研究通过控制被试识记阶段的认知定向 ,考察记忆、联想同义 (或反义 )词、判断发音正确性三种不同的认知定向任务对单嗓音源和双嗓音源听觉词记忆的影响。