A Study On The Effects Of Target's Motion And Identity Characteristics On Visual Dynamic Tracking Of Autistic Children

The incidence of autism spectrum disorders(ASD)is increasing globally year by year,and more and more attention has been paid to autism in various fields of society.Many studies have shown that autistic children have visual processing obstacles to external motor stimulation,and there are a lot of dynamic information in real life.Whether an individual can detect these dynamic information normally and maintain visual attention is the basis for making appropriate behavioral responses.Therefore,it is particularly important to observe the performance of autistic children in visual motion tracking and to explore the characteristics and laws of motion information processing in autistic children.Relevant studies have found that different target stimuli lead to different conclusions,and to some extent,autistic children have atypical processing of target characteristics.Based on previous studies,this study will design experiments to explore the characteristics of visual tracking and processing of dynamic information for autistic children from the perspective of visual dynamic information processing.It will provide empirical evidence for the research in the field of visual motion tracking,thus providing research support for the formulation of intervention strategies.In this study,41 autistic children aged 3-7 were selected to complete a series of visual tracking tasks.In this study,we used the free-view paradigm,the principle of multi-factor in-subject experiment design,and the eye movement technology to collect data to explore the effects of target stimulus motion characteristics and identity characteristics on visual dynamic information tracking of autistic children.There are two main experiments in the study:in experiment 1,autistic children were asked to track the same target stimulus,and the effects of movement speed and path on the same target stimulus task were investigated.In experiment 2,autistic children were asked to complete the task of tracking social and non,social target stimulus respectively,and the effects of identity characteristics of target stimulus on visual tracking of autistic children were investigated.Through quantitative processing of eye movement data and statistical analysis of SPSS data,the following conclusions are drawn:1)Autistic children's visual tracking of the target is affected by the moving characteristics of the target,which shows that with the increasing of speed,the tracking situation is better,and in the tracking task of regular path,the tracking situation is better.2)Autistic children's visual search and dynamic tracking of targets are significantly correlated with their identity characteristics,showing less attention to social goals,which may be one of the reasons for their social disorders;Moreover,compared with the target's motion characteristics,the influence of identity characteristics on their visual tracking is more significant.3)For the real person's visual dynamic processing preference,autistic children tend to focus on face with more social information,which shows that they can detect the faces of people and allocate more attention to the face area.The results of this study are helpful for the assessment of autistic children and the further development of intervention strategies.For the design of dynamic intervention materials,we should consider the effects of object's speed and path of movement on the attention allocation of autistic children,and minimize the presence of unrelated stimuli in the environment of social competence intervention.