Fan Yang-Teng, Hsu Ya-Yu, Cheng Yawei
Institute of Neuroscience and Brain Research Center, National Yang-Ming University, Taipei, Taiwan.
Neuroreport. 2013 Jun 19;24(9):457-63. doi: 10.1097/WNR.0b013e32836169b9.
This work investigates the impact of task load on irrelevant emotional voice processing between the sexes. The working memory task was manipulated by asking participants to evaluate the position of a visual stimulus (0-back) and compare the position of the current stimulus with the one or two trials before (1-back and 2-back). We recorded auditory event-related potentials while presenting the emotionally spoken syllables 'dada' and acoustically matched nonvocal sounds to healthy adults. Women, not men, showed larger amplitudes of emotional mismatch negativity (MMN), presumed to reflect preattentive auditory change detection, during the 1-back task than the 0-back and 2-back tasks. Among women only weaker emotional MMN amplitudes were associated with a higher 2-back accuracy. Neither task difficulty nor sex had any effect on MMN when responding to nonvocal sounds. Our findings suggest that there are sex differences in preattentive emotional voice processing under varying levels of task load.
这项研究调查了任务负荷对两性无关情绪语音处理的影响。通过要求参与者评估视觉刺激的位置（0回溯），并将当前刺激的位置与前一次或前两次试验的位置进行比较（1回溯和2回溯）来操纵工作记忆任务。在向健康成年人呈现情感化说出的音节“dada”以及声学匹配的非语音声音时，我们记录了听觉事件相关电位。在1回溯任务中，女性而非男性表现出比0回溯和2回溯任务更大的情绪失配负波（MMN）振幅，推测这反映了前注意听觉变化检测。仅在女性中，较弱的情绪MMN振幅与较高的2回溯准确率相关。对非语音声音做出反应时，任务难度和性别对MMN均无任何影响。我们的研究结果表明，在不同任务负荷水平下，前注意情绪语音处理存在性别差异。
