Visual scanpaths to threat-related faces in deluded schizophrenia
Visual scanpaths to threat-related faces in deluded schizophrenia
复制标题
DOI：
10.1016/s0165-1781(03)00129-x
复制
发表时间：
2003-08-01
影响因子：
11.3
通讯作者：
Davidson, D
中科院分区：
文献类型：
--
作者：
Green, MJ;Williams, LM;Davidson, D
本研究考察了妄想型精神分裂症（n=11），非妄想型精神分裂症（n=8）和健康对照（n=22）参与者对威胁相关（愤怒，恐惧）和非威胁面孔（快乐，悲伤，中性）的视觉认知加工。焦点分析研究了精神分裂症患者亚组中特定面部表情的扫描路径畸变，这些亚组由是否存在明显的妄想来确定。精神分裂症受试者表现出显着更少的注视时间较短的所有面孔，和更少的注视时间减少的功能领域的负面。面部表情（愤怒，悲伤），与健康对照组相比。与非妄想精神分裂症被试相比，妄想精神分裂症被试对恐惧表情的注视较少，对快乐表情的注视较多。与健康对照组相比，在整个精神分裂症组（n=19）中，这些发现是在限制性扫描（注视次数和持续时间减少，扫描路径长度缩短，注视面部特征的持续时间缩短）的背景下发现的。研究结果表明，一个控制注意力偏差远离功能区的负面面部表情在妄想型精神分裂症，也就是说，具体到威胁相关的表情相比，非妄想型精神分裂症的主题。这种控制偏差远离负性社会刺激的妄想型精神分裂症的注意力风格的“警惕回避”的信息处理的早期和晚期阶段的操作方面进行了讨论。(C)2003爱思唯尔爱尔兰有限公司保留所有权利。
This study examined visuo-cognitive processing of threat-related (anger, fear) and non-threat faces (happy, sad, neutral) in deluded schizophrenia (n=11), non-deluded schizophrenia (n=8), and healthy control (n=22) participants. Focal analyses examined scanpath aberrations for particular facial expressions in sub-groups of schizophrenia patients determined by the presence or absence of overt delusions. Deluded schizophrenia subjects exhibited significantly fewer fixations of shorter duration for all faces, and fewer fixations of reduced duration to the feature areas of negative. facial expressions (anger, sad), compared with healthy controls. Compared with non-deluded schizophrenia subjects, deluded subjects exhibited fewer fixations to fear expressions and more fixations to the feature areas of happy expressions. These findings were revealed in the context of restricted scanning (reduced number and duration of fixations, shorter scanpath length and shorter duration of fixations to facial features) in the entire schizophrenia group (n=19) compared with healthy controls. The findings suggest a controlled attentional bias away from the feature areas of negative facial expressions in deluded schizophrenia, that is, specific to threat-related expressions compared with non-deluded schizophrenia subjects. This controlled bias away from negative social stimuli in deluded schizophrenia is discussed in terms of an attentional style of 'vigilance-avoidance' operating across early and late stages of information processing. (C) 2003 Elsevier Ireland Ltd. All rights reserved.