An Eye Movement Study Of The Effects Of Scene Factors On Eye Line Processing In Adolescents With Autism Spectrum

There was a significant relationship between social communication disorder and ASD individual eye processing,which is one of the core characteristics of the individuals with autism spectrum disorders.Previous studies have found that ASD teenagers or children's sight processing obstacles occur only in real complex social scene.However,what factors led to the social scene inside the ASD teenagers or children's eyes sight processing disorder,is not clear.It has profound theoretical significance and practical significance to explore how scene factors influence on ASD adolescents individual eye gaze of processing.This study selected 12 ASD adolescents as the experimental group,meanwhile,15 normal adolescents as the chronological age control group and 15 normal children as the mental age control group,choose the eye tracking technology to present dynamic true nature scene with different types of stimulus.This study used SPSS statistical tools to analysis eye movement data.Experiment 1 investigated ASD adolescents individual eye gaze processing behavior in the scene of faces position.The results showed that(1)Visual attention model.The CATD group pay more attention on face than in the ASD group,less attention to background and objects in the eye contact state.Eye contact condition of peripheral face,no difference between the two.In the attention state,both faces in what place,as ASD group and control group were more concerned at the scene,followed by the face,body and object region,and finally macroscopic background area.The three groups had no significant difference on eyes area in the face of visual mode.(2)Gaze following model,the macro analysis of eye movement index showed that the 3 groups of subjects in the peripheral position of the saccade accuracy is higher than the central face position,3 groups of subjects in the two position of the face object at the time had no significant difference the difference of the ratio,and from the micro analysis of eye movement index.The results show that both the central and peripheral position,group ASD first saccade correct rate should be lower than that of CATD group,ASD group object first fixation duration was lower than the CATD group,but no significant difference with MATD group,that macroeconomic indicators are difficult to find the differences between the ASD group and CATD group.Experiment 2 investigated ASD adolescents individual eye gaze processing behavior in the scene of physical factors.The results showed that(1)visual model,in the contact stage,ASD group paid less attention to face,pay more attention to the background and object than in the CATD Group.In the attention state,regardless of the scene in the presence of physical factors,as ASD group and control group were more concerned at the scene,followed by the face,body and object region,background region.Finally the three groups of participants pay more attention to the object region in under dynamic conditions than under static conditions.The three groups had no significant difference on eyes area in the two physical.(2)Gaze following model,show that the micro eye movement index,whether static or dynamic conditions,the ASD group.For the first time in years of saccade and objects.The ratio between the first fixation time was significantly lower than that of CATD group,the ratio between saccade and objects but group MATD and group.3 had no significant difference between subjects viewing time ratio higher than the dynamic conditions under static conditions.Experiment 3 investigated ASD adolescents individual eye effect processing in the scene of word cues,the results of the study showed that(1)visual mode,in eye contact stage language,ASD group than in the CATD group but less attention to face region than in the CATD group to pay more attention to the background area.Three the subjects in the stage without eye contact language under the scene fixation model had no significant difference,they pay more attention to the region of interest in the scene language cue conditions,but no language cues,they have to pay more attention to face area,followed by the body and the object,finally the background region of interest.The three groups had no significant difference on eyes area in with/without word cues.(2)Gaze Following model.The micro eye indexes show 3 groups of subjects in the difference of language under the condition of saccade ratio were significantly higher than non language conditions,ASD group differences in saccade ratio in two language conditions,first saccade difference of the ratio was lower than that in CATD group,there was no significant difference between group MATD and group ASD;object fixation time difference the ratio of the target object and the first fixation time were significantly lower than that of MATD group and CATD group.Through the analysis of the three series of experimental results,this study found that,in the visual attention model,ASD adolescent paid less attention to face areas than the CATD group teenagers in contact state,but the ASD adolescents and two normal control group pay less attention on eye area per state;in the following behavior,ASD adolescent is close to mental age matched normal children,and much lower than the normal physiological age adolescents.In social interaction with individual ASD,we put forward the following suggestions:(1)teachers should provide clear vision clues help ASD youngsters to follow sight joint attention;(2)teachers should control the physical factors in the scene,in order to reduce the interference effect of physical factors on adolescent ASD gaze following;(3)teachers should provide effective language clues,help ASD youth chase With the line of sight to reach common attention.