Facial emotion processing in schizophrenia: No evidence for a deficit specific to negative emotions in a differential deficit design
Facial emotion processing in schizophrenia: No evidence for a deficit specific to negative emotions in a differential deficit design
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DOI：
10.1016/j.psychres.2005.08.006
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发表时间：
2006-06-30
影响因子：
11.3
通讯作者：
Karayanidis, Frini
中科院分区：
文献类型：
--
作者：
Johnston, Patrick J.;Devir, Holly;Karayanidis, Frini
精神分裂症患者在识别情绪的面部表情时表现不佳，特别是恐惧等负面情绪。这一发现被认为是“消极情绪特异性缺陷”的证据，推测与边缘系统功能障碍有关，尤其是杏仁核。另一种解释是，识别负面情绪的难度更大，可能反映了任务难度的先天差异。本研究使用差额赤字设计来检验上述论点。在三组中比较了七种情绪类别的面部情绪识别准确率。18名精神分裂症患者和一组年龄和性别匹配的健康对照组观看了相同的刺激集。第二组是18名年龄和性别匹配的对照组，他们观看了相同刺激的降级版本。选择刺激退化的水平是为了将总体准确性水平等同于精神分裂症患者。与完整图像对照组相比，精神分裂症组和退化图像对照组的总体识别准确率降低，对恐惧和悲伤的面部刺激的识别准确率也降低。在精神分裂症组和退化图像对照组之间，在任何情绪类别的识别准确率上没有差异。这些发现与精神分裂症的负面情绪特异性缺陷相抵触。(C)2005爱思唯尔爱尔兰有限公司。保留所有权利。
People with schizophrenia perform poorly when recognising facial expressions of emotion, particularly negative emotions such as fear. This finding has been taken as evidence of a "negative emotion specific deficit", putatively associated with a dysfunction in the limbic system, particularly the amygdala. An alternative explanation is that greater difficulty in recognising negative emotions may reflect a priori differences in task difficulty. The present study uses a differential deficit design to test the above argument. Facial emotion recognition accuracy for seven emotion categories was compared across three groups. Eighteen schizophrenia patients and one group of healthy age- and gender-matched controls viewed identical sets of stimuli. A second group of 18 age- and gender-matched controls viewed a degraded version of the same stimuli. The level of stimulus degradation was chosen so as to equate overall level of accuracy to the schizophrenia patients. Both the schizophrenia group and the degraded image control group showed reduced overall recognition accuracy and reduced recognition accuracy for fearful and sad facial stimuli compared with the intact-image control group. There were no differences in recognition accuracy for any emotion category between the schizophrenia group and the degraded image control group. These findings argue against a negative emotion specific deficit in schizophrenia. (c) 2005 Elsevier Ireland Ltd. All rights reserved.