The Effect Of Different Task Difficulty On The Learning Disability Children's Inhibition Of Return

Inhibition of return (IOR) is a significant phenomenon in selective attention.It is the hysteresis phenomenon shown by the reaction of the previous note on the location .It helps the attention of the previous to the new space of location, increased attention's search efficiency in the visual space, reflecting evolutionary adaptation of the human about the complex environment.By research of the learning disabilities IOR characteristics, It helps to human understanding of the nature of inhibition of return in theory.Two eye movements recording experiments were carefully manipulated on learning disabilities and normal children in grade 4 of Primary school to Investigate the influences difficulty of different tasks on learning disabilities.The current study selected Grade 4 of the normal and learning disabilities primary school,and set two kinds of cue validities according to the relationship between cue validity and exdogenous attention,three kinds of Stimulus Onset Asynchronys to find out the effects of task difficulty on learning disability children's inhibition of return.The experimental materials were programmed and presented by EYELINK II which can automatiely record the reactiontime,the first saccade ampulate and the first saccade latency when a participant pushes down the corresponding button.In experiment one, we examined the effects of simple detection tasks on the learning disability children's inhibition of return.The results suggested that learning disabilities could find Inhibition of return in detective taskds.There were significant differences in the reaction time and the capacity of IOR. The mean learning disabilities were slower than normal students in reaction time processing speed. Learning disabilities were liabled to cue validities and found facility rather than inhibition of return.There were significant differences in the first saccade ampulate and there were no significant differences in the first saccade latency.In experiment two, we examined the effects of discrimination tasks on the learning disability children's inhibition of return. The result of the research shown that there were significant differences in the reaction time and the capacity of IOR.In learning disabilities, there were significant differences in reaction time between cued and uncued. Learning disabilities need obvious longer response than normal children.The more difficult the task was, the later the inhibition of return appeared with the short cue-target SOA. Learning disabilities can find IOR, but at the time appeared on far longer SOA.There were no significant differences in the the first saccade ampulate and there were significant differences the first saccade latency.As stated above, the systematic research on the IOR under different tasks in learning disabilities and normal children testified all the hypothese.Learning disabilities had IOR deficiency, learning disabilities had IOR deficit may partly because they had difficulties in using the cue information and lacked of better attentive strategies.The research enriched the understanding the mechanism of learning disability children's attentive deficit in theory.These findings may benefit the education practitioners in that it may give teachers more knowledge about learning disability children's attention problem, help teachers make appropriate and necessary interventions, and ultimately promote the sufficient development of learning disability children attentive abilities.