The Characteristics Of Inhibition Control In Information Processing Of Middle School Students With Dyslexia

Inhibition control is the core of executive function,which can ensure that students can effectively monitor reading,help students focus on learning information,and suppress the interference of automatic processing and other irrelevant stimuli.Dyslexia is one of the main types of learning difficulties.Many studies have confirmed that dyslexia has impairment in executive function,but the inhibition control still needs to be further discussed.In order to explore the characteristics of inhibitory control of dyslexic students,the study used pro/antisaccade task,oculomotor capture task and countermanding saccade task to explore the eye movement characteristics of inhibitory control of 30 dyslexic junior students and 30 controls.In Experiment 1,the prosaccade and antisaccade task were used to measure oculomotor inhibition of two groups.The results of antisaccade task indicated the antisaccades accuracy of dyslexia was significantly lower than that in the control,and latency of error corrections was significantly higher than those in the control group;In the antisaccade task,the pupil size of dyslexia was smaller than the control,while in the prosaccade task,there was no difference between the two groups.In Experiment 2,the oculomotor capture task was used to explore the characteristics of saccade capture in dyslexia and control group,and to test the capacity of subjects to suppress irrelevant stimulus interference.The results showed there was no significant difference in the accuracy between the two groups,but the RT of dyslexia was longer than that of the control;The results of eye movement showed the accuracy of the first saccade was significantly lower than that of the control group,and the saccade latency was significantly longer than that of the control group.In Experiment 3,the countermanding saccade task was used to investigate the ability to inhibit the already initiated ongoing response in dyslexia and control group.The results of eye movement showed that group difference was found neither for the saccadic latency nor for the amplitude under the no stop signal trials;Under the stop signal trials,the error rate and saccade latency were significantly higher than those in the control group,and the main effect of stop signal delay time was not found.The following conclusions are drawn through experimental research:Firstly,junior middle school students with dyslexia have a weak function of suppressing sudden stimuli;Secondly,junior middle school students with dyslexia have insufficient ability to suppress interference stimuli;Thirdly,junior middle school students with dyslexia have a poor ability to suppress dominant response tendencies.