| One of the complicated researches on vision is to find out how the brain works on the binding problem. Objects in the natural world are made of different features such as shape, size, color, direction, etc. and these features are processed in diverse parts of the brain. Take the example of the visual perception, the formal features as color and shape are represented through the pathway from occipital to temporal lobe, whereas the spatial feature as movement is conveyed by the dorsal pathway from occipital to parietal lobe. Therefore, to perceive the objects as a whole and not separately is to combine all the information that exists in different parts of the brain, and this is so-called "binding problem". One important evidence for its existence is that the features of the objects can not be integrated in the right position on the condition of distractive or overloading attention, and there comes the phenomenon of exchanging the features between the objects, that is to say, the illusory conjunction. For example, if the subjects are displayed a red X and a green O, they response as green X and red O, that is the illusory conjunction.At present time, binding is publicly regarded as the heated issue in cognitive psychology and cognitive neurology, its research belongs to the leading field and impels in the study in cognitive neural mechanism of psychological process as well as the puzzle of the consciousness. Scholars in qur country do not pay much attention to this field and even the foreign scholars can not reach an agreement in its theory and experimental results. Based on study and analysis of the previous research work, it proves that the disagreement lies in its psychological and physiological mechanism and the influence of attention and parietal lobe on feature binding. Meanwhile, there exist some irrational factors in the experimental paradigm and its measuring standard. This dissertation aims at the testimony of the function of attention as a cognitive factor and its functional mechanism, the adjusting function of parietal lobe, especially the right parietal cortex, on the visual feature binding, and therefore to testify different theories ' on feature binding.This research consists of four experiments which includes 10 sub-experiments to testify the cognitive and brain mechanism of the visual feature binding in the temporal and spatial domains.On the cognitive mechanism, experiment 1 carried out by 3 sub-experiments directly controls the attention as a cognitive variable confined in distractive and focal condition, to testify its function in visual feature binding with various experimental paradigm, and to further testify the feature integrity theory. It proves that attention plays an important role in visual feature binding, focal attention can effectively reduce the possibility of illusory conjunctions. To be more specific, the difference of illusory conjunction in condition of different distractive attention are significant, distractive attention leads to illusory conjunction, the higher the distractive level is, the more errors of illusory conjunction the subjects will make; illusory conjunction on the focal condition (effective cue) is far less than on the distractive one (ineffective cue), it draws a conclusion that focal attention can effectively restrain the illusory conjunction; its adjusting function is represented in distance effect, near objects are easily causing more illusory conjunctions than far ones, its functional mechanism might be related to its information of distance.On the neurological mechanism, experiment 2 carried out by 2 sub-experiments is a case study of a patient with bilateral parietal lesion, it is to testify the mechanism of parietal lobe in visual feature binding for the cognitive neural perspective. Experiment 3 is a contrast study between patients with partial lesion of the right parietal lobe and normal subjects, its 2 sub-experiments testify the right parietal lobe and spatial attention confined in distractive and focal attention conditions as well as...
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