Department of Psychology, University of Durham, Science Laboratories, South Road, Durham DH1 3LE, United Kingdom.
Brain Cogn. 2011 Jul;76(2):239-44. doi: 10.1016/j.bandc.2011.02.005. Epub 2011 Mar 12.
The present study examined the relationship between individual differences in dichotic listening (DL) and the susceptibility to left-right confusion (LRC). Thirty-six men and 59 women completed a consonant-vowel DL test, a behavioral LRC task, and an LRC self-rating questionnaire. Significant negative correlations between overall DL accuracy and LRC rates in men (behavioral task) and self-ratings in women, indicated that the more participants struggled with left-right discrimination, the fewer DL syllables they reported correctly. However, there was no relationship between LRC and the typical right ear advantage. Thus, there is a sex- and task-dependent relationship between LRC and overall DL accuracy, but not between LRC and ear asymmetry. It is concluded that (a) atypical ear asymmetries, as in certain clinical populations, cannot be explained by associated deficits in left-right discrimination, and (b) LRC can negatively affect task performance, even when participants do not have to make explicit "left" versus "right" decisions.
本研究考察了在双侧分听（DL）个体差异与左右混淆易感性（LRC）之间的关系。36 名男性和 59 名女性完成了辅音-元音 DL 测试、行为 LRC 任务和 LRC 自评问卷。男性（行为任务）和女性的整体 DL 准确性与 LRC 率以及自我评分之间存在显著的负相关，表明参与者在左右辨别方面的困难越大，他们报告的 DL 音节就越少。然而，LRC 与典型的右耳优势之间没有关系。因此，LRC 与整体 DL 准确性之间存在性别和任务依赖性的关系，但与耳不对称性之间没有关系。研究结论为：（a）某些临床人群中出现的非典型耳不对称性不能用左右辨别相关的缺陷来解释；（b）即使参与者不必做出明确的“左”与“右”决策，LRC 也会对任务表现产生负面影响。
