The Study Of Visual Field Bias When Chilren With Autism Visual Process

ASD(Autism Spectrum Disorder) ASD(Autism Spectrum Disorder) is a series of developmental disabilities occurred in early childhood, represented by social communication barriers and restrictive interest or repetition. The available studies on the face recognition of infantile autism indicate that peculiar vision processing method could be one of the early symptoms standing for the functional defect of relevant zone of the brain.social communication is a complicated activity including face and its surrounding scene. In order to discuss whether the normal person’s view bias on face cognition will occur in the social contact scene processing of infantile sutism patient or not, this experiment selects31ASDpatients at the age of3to6and31normal children to view scene pictures,and collects eye-movement index:1. In study1participants are made to watch20indoor and outdoor bilateral symmetry pictures Autistic children’s visual bias towards scene shows the same phenomenon with normal children at no-social scene environment, namely, preferring to left view field represented by taking shorter time to detect the indoor scene within the left view filed and longer time to watch and observe; their simultaneous processing capability is weaker than normal children.2. in order to further explore whether the appearance of human faces have impact on the visual bias attention,study2paticipants are showed8indoor bilateral symmetry pictures with the same person sitting on each side.results show that both autistic children and normal children will show the left visual bias in the holistic processing of figures and faces in the district of scene; in the whole process, autistic children’s visual processing ability is insufficient, their perception speed is slower than normal children and their fixation time is shorter.3. the results of study3finds that The left visual bias is not so obvious when the bilateral scenes only have one figure on the left or right side and under which condition face have drawn much attention of two groups of children, so they all show bias of the figure appearance scenes.Above all, ASD children and normal children both have the left visual bias attention in their scene perception process, but when there is lower level perception stimuli such as faces the social information, the phenomenon of visual bias attention of ASD children and normal children will be not so obvious. ASD children’s perception and processing of scenes is worse than normal children.