Loughland Carmel M, Williams Leanne M, Gordon Evian
Cognitive Neuroscience Unit, The Brain Dynamics Centre, Westmead Hospital, Westmead, NSW 2145, Australia.
Schizophr Res. 2002 May 1;55(1-2):159-70. doi: 10.1016/s0920-9964(01)00186-4.
We used a psychophysiological marker of visual attention (visual scanpath) to investigate facial emotion processing in schizophrenia (n= 65) and healthy control (n = 61) groups. Visual scanpaths to 'happy', *sad' and 'neutral' faces (two exposures each) were recorded using video-oculography. Emotion recognition accuracy was assessed under both 'difficult' (exposure 1) and 'limited choice' (exposure 2) conditions. Compared to controls, schizophrenia subjects showed 'restricted' scanning and reduced attention to salient facial features (eyes, nose, mouth), that was particularly apparent for happy and neutral faces: accuracy was correspondingly reduced for the 'difficult' condition. The schizophrenia deficit in positive emotion perception may reflect a failure to integrate salient features due to dysfunctions in local processing of detailed, relevant information (fewer fixations, less attention to facial features), and in the networks that synchronise local and global processing of biologically-relevant face stimuli (generally restricted scanning style).
我们使用视觉注意力的心理生理指标(视觉扫描路径)来研究精神分裂症患者(n = 65)和健康对照组(n = 61)对面部情绪的处理。使用视频眼动描记法记录对“快乐”“悲伤”和“中性”面孔(每种面孔各展示两次)的视觉扫描路径。在“困难”(第一次展示)和“有限选择”(第二次展示)两种条件下评估情绪识别准确性。与对照组相比,精神分裂症患者表现出扫描“受限”,对显著面部特征(眼睛、鼻子、嘴巴)的关注度降低,这在快乐和中性面孔中尤为明显:在“困难”条件下,准确性相应降低。精神分裂症患者在积极情绪感知方面的缺陷可能反映出由于在处理详细、相关信息的局部过程中功能失调(注视次数减少、对面部特征的关注度降低),以及在同步生物相关面部刺激的局部和全局处理的网络中(通常扫描方式受限),导致无法整合显著特征。