视频材料中双眼注视视差的情绪面孔相关性:双眼协调

Emotional Face Correlation of Binocular Fixation Disparity in Videos: Binocular Coordination

为了保持主观视知觉的整体性和单一性,双眼在收集信息过程中需要得到精确的协调和统整,即双眼协调。然而现有文献多以赫林法则——把双眼当作一个器官,行动模式完全一致——为基础进行“单眼视觉”研究。自闭症儿童和对照组儿童在观看不同情绪面孔视频时,Tobii眼动仪高精度记录了眼动轨迹。高精度数据中的不同噪音被针对性的滤除后,时间序列上双眼注视视差的变化情况得到了清晰的呈现。分析结果表明:(1)双眼注视视差随着刺激和时间变化而变化。这反驳了赫林法则,间接支持赫尔姆霍兹假设:两只眼睛是相对独立的,并相互协作;(2)在不同情绪面孔下,正常儿童的双眼注视点间距表现出一致的变化模式,表明情绪面孔对双眼注视点间距具有调节作用;(3)而自闭症被试的双眼注视视差在所有的情绪面孔上均存在显著的特异性,进一步揭示了自闭症儿童对情绪面孔感知的特异性。

To maintain the integrity and uniformity of subjective visual perception,both eyes need to be precisely coordinated and integrated during the process of collecting information,that is,binocular coordination.However,most of the existing literature studies“monocular vision”on the basis of Herring’s law,which considers both eyes as one organ with the exact same pattern of action.When children with autism and children in the control group watched videos of faces with different emotions,the Tobii eye tracker recorded their eye movements with high accuracy.After the various noises in the high-precision data were targeted and filtered out pertinently,the change of binocular fixation disparity in the time sequences was clearly presented.The analysis results showed that:(1)the binocular disparity changed with the stimulation and time,which contradicted with Herring’s law and indirectly complied with Helmholtz’s hypothesis that the two eyes were relatively independent and coordinated with each other;(2)the binocular fixation space of normal children facing different emotional faces showed a consistent pattern of change,indicating that emotional faces had a regulatory effect on binocular fixation space;(3)however,the binocular fixation disparity of autistic subjects had a significant specificity on all emotional faces,which further revealed the specificity of autistic children’s perception of emotional faces.