| Autism spectrum disorder(ASD)individuals show abnormal fixation patterns and abnormal physiological responses when they processing gaze.To explore the processing characteristics of dynamic gaze direction shift in ASD children,two experimental studies were designed.Study 1,15 children with ASD aged 3-7 years and 15 children with typical development(TD)were selected,eye movement and skin conductance at the same time of them were recorded while passively viewing two types videos of gaze direction shift from direct gaze to strabismus 60°,or from strabismus 60° to direct gaze.The results showed that:(1)ASD children showed significantly less fixation to two types of video than TD children;(2)the children with ASD aroused higher physiological arousal when they watched videos of two types of gaze direction shift;(3)there was no significant correlation between the fixation time and fixation count of children with ASD and the skin conductance to two types of videos.Study 2,18 children with ASD aged 3-7 years and 19 children with TD were selected,eye movement and skin conductance data at the same time of them were recorded while watching videos of two types of dynamic direct gaze,such as approaching and away from,the results showed that:(1)children with ASD only showed a significant less fixation to approaching dynamic direct gaze than TD children;(2)only when watching videos of away from the dynamic direct gaze,children with ASD were aroused a higher physiological arousal;(3)there was a significant positive correlation between the fixation count of children with ASD and skin conductance to approaching dynamic direct gaze when watching videos of dynamic direct gaze.The results mainly support the theory of active avoidance and hyperarousal model,which has important implications for the intervention training of eye gaze in ASD children. |
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