Comparative Experimental Study On Visual Perceptual Processing Abilities Of Figure Of Deaf And Hearing-normal Human

In the perceptive studies of modern cognitive psychology, the local processing hypothesis is the core theory of experimental study. Being one opposite theory, the holistic processing hypothesis also affects the perceptive studies, and corrects the research direction of local processing hypothesis in some degree. However, for the shortage of the evidence of experimental study in Gestalt psychological research, the holistic processing hypothesis deviated from the main stream of modern cognitive psychology. Based on twenty years's research, Chen Lin developed the holistic processing hypothesis of Gestalt psychology into topology property perception theory, and thought of the human perception as a processing from holistic property to local property of perceptual object. From the viewpoint of Chen, a primitive and general function of the visual system is the perception of topological properties, and perceptual organization should be understood in the perspective of transformation and perception of invariance over transformation in the topological approach.Based on the Chen's topology property perception theory, we designed a series of experimental materials in four studies, and emipoyed some experimental paradigms, such as attentional capture and change blindness, in order to examine the basic viewpoint of topology property perception theory. At the same time, we used some new variances, for example, visual stimulus emerging time, visual attentional loading, special visual stimulus, and meaning of visual stimulus, in order to examine the effect of affecting factor of visual processing. Based on the studies on cross-modal plasticity of sensory deprived animals or sensory loss human, we also examined the visual compensation mechanism in deaf human, and compared the differences between deaf and hearing-normal human.Through analyzing the research result of four series studies, we conclude that the description about toplogical perception that is prior to the perception of local featural properties does not fit to the visual perception, and the figure visual perception is not affected by the different geometrical levels, and the relative perceptual salience of different geometrical properities is not consistent with the hierarchy of geometries according to Klein's Erlangen Program. At the same time, we conclude that the visual compensation in deaf human is limited and selected because of the audio-loss. In the task of visual judgment of difference between two figures, the visual perception abilities of deaf human kept the same level when the emerging time of visual stimulus becomes short, but was not different from hearing-normal human in total. In the task of visual search which must be completed in the condition of attentional loading or central focus of attention, the abilities of visual perception had no difference between deaf and hearing-normal human, and the visual compensation in deaf human did not appear. In the task of changing detection during a temporal gap, deaf human did worse than hearing-normal human in that they could not effectively detect the change between the orginal and altered figure.