Deaf People Pay Attention To Capture Under Different Vision Location Of Eye Movement Research

There exists two arguments on the research of attentional capture, namely top-down and bottom-up processing. The top-down processing refers to the goal-driven processing, emphasizing the influence of the individual expectations and goals on their choice of information. The bottom-up processing mainly refers to the stimulus-driven processing, emphasizing that some specific stimulus which is irrelative to the current task attracts attention, and thus affect the processing of individual information. Because the entire information of the view field can not be processed by visual system, the mechanism of visual attention is required to filter and select the miscellaneous information. And the relevant information which meet the objective enters the sensory system for further processing. Therefore, attention plays an important role of coordinating throughout the processing.The processing of human’s information relies on vision to a large extent, and about80%-90%information from the outside is received by the eyes. In particular, the acquisition of visual information is of great importance for the deaf. With regard to the problem of visual attention that will strengthen or not for the deaf, the "defect hypothesis " and the " compensation hypothesis " have been supported by their experimental researches. However, few research has reported the differences of the characteristics of attentional capture between the deaf anf the normal. Therefore, this study attempts to reveal the characteristics of attentional capture for the deaf, and investigate the similarities and differences with the normal. This study will disclose the fact of attentional capture in the different load of working memory and the different location of view. The purpose is to explore the similarities and the differences of attentional capture between the deaf and the normal, and the relationship between the top-down control regulation and the the location of visual field.There are three experiments in this study. In the experiment1, the influence of color distracter on the attentional capture in the different viewing angle is compared between the deaf and the normal. The result shows that, When the stimulus was presented1°angle of view, Deaf on the speed and accuracy of target stimuli to be worse than normal hearing, When the stimuli were presented in the perspective of6°and11°angle of view, there is no such differences; In Different viewing angle, the two types of subjects showed a similar eye movement pattern; there is no actual difference on attentional capture in different viewing angle between the deaf and the normal hearing; Color interference stimulation of attentional capture phenomenon has a certain vision of position effect.In the experiment2, the influence of color distracter on the attentional capture in the different load of working memory is compared between the deaf and the normal. The result shows that the response to Stimulate between the deaf and normal hearing is different, the response of the deaf to stimulate is slower than the normal hearing, In the high working memory load, the deaf have more fixation counts than the normal hearing, but in the low working memory load, there is no such difference; there is no actual difference on attentional capture in different viewing angle between the deaf and the normal hearing in the working memory load condition. Working memory load effect the color interference stimulus capture attention, Attentional capture phenomenon is regulated by top-down cognitive control.In the experiment3, the influence of shape distracter on the attentional capture in the different load of working memory is investigated. The result shows that the speed of reatction to stimulate of deaf is significantly slower than the normal hearing in high working memory load, and there is no such difference in low working memory load, there is no actual difference on attentional capture in different viewing angle between the deaf and the normal hearing in the working memory load condition.The shape distractor have little effects on the search speed and accuracy of target, but in different working memory load, the shape distracter stimulation affect the subjects’eye movement pattern.The results of the above experiments show that:1. There is no actual difference on attentional capture in different viewing angle between the deaf and the normal hearing, but in the high working memory load condition, the deaf’s overall Visual perceptual processing capacity is worse than the normal hearing;2.The load of working memory have a certain impact on attentional capture. The attentional capture is not a purely bottom-up and stimulus-driven processing, and it is also regulated by the top-down cognitive control;3.The degree of attentional capture unrelated distracter change as the viewing angle changes, attentional capture under different viewing angle independent of the stimulate.