Exploring The Mechanism Of Color Location With Binding Based On The Asymmetry Of Feature Binding

The problem of feature binding has always been the core and basic problem in visual working memory.Previous research on feature bundling has focused on the relationship between feature bundling and attention resources,and explored whether feature bundling needs attention resources.However,with the deepening of research,asymmetry of feature bundling as a special phenomenon of feature bundling has been discovered and explored by researchers.As a special binding mechanism of feature binding,collateral binding has not been explicitly conceptualized and specially discussed in previous studies.Therefore,based on the asymmetry of color-location binding,this study explores the internal mechanism of color-location binding.In my opinion,the essence of color-position attached binding is the asymmetry of binding.Based on this,this study designed three experiments to explore the color-position attachment binding.In experiment 1,a single stimulus change detection paradigm was used to explore the color-position attachment binding.The independent variables were memory task(single color memory,single location memory)and detection stimulus type(original matching,re-matching and new color location).The dependent variables were the correct rate of detection stimulus and reaction time.By comparing the response time differences of original matching and re-matching under different memory tasks,we found that the response time of original matching was significantly higher than that of re-matching under the condition of single color memory task,and there was a binding effect.However,under the condition of single location memory task,there was no significant difference between the response time of original matching and re-matching,and there was no binding effect.The results of Experiment 1 verify the existence of color-position attachment binding phenomenon.The second experiment explored the formation mechanism of color-location attachment binding by using a single stimulus change detection and visual search paradigm.The independent variables were visual search type.They were the color position information of the blocks occupied by the search target matched the memory items perfectly,the color position information of the blocks occupied by the search target stimulus and the interference stimulus matched the color and position of the memory items respectively,and the control conditions(which did not match the color position of the memory items).The dependent variable was drop.Percentage of the first gaze in the target stimulation area of interest and the interference stimulation area of interest.We focused on comparing the percentages of the first gaze of target stimulation and interference stimulation under matching conditions.The results showed that the percentages of the first gaze of target stimulation in the region of interest of location were significantly higher than that of the first gaze of target stimulation in the region of interest of color,indicating that the location feature had priority of eye movement capture compared with the color feature.The results of Experiment 2 provide evidences for eye movement capture in the formation mechanism of color-position attachment binding,and support the asymmetry of binding between object feature and spatial location feature under the condition of feature binding.The third experiment was designed to explore the difference of color-position binding asymmetry in EEG P300,and to provide evidence of brain mechanism for color-position binding.In the experiment,a single stimulus change detection paradigm was used,and EEG data of subjects'behavior data were collected at the same time.Single factor design was conducted in the subjects.The independent variables were memory task type,single color memory,single position memory and color position memory.The dependent variable is the average amplitude of P300,which represents the electrodes in the parietal and occipital lobes.Results There was no significant difference in the components of P300 between single color memory and color-position binding memory.There was significant difference in the components of P300 between single position memory and color-position binding memory.The results show that the color-location binding memory effect appears in the single color memory condition,while the single location memory has no binding effect.The results support the asymmetry of color-location binding,and provide ERP evidence for color-location binding.The main conclusions of this study are as follows:asymmetric color-position binding on eye movement capture and electroencephalogram P300 provides evidence at the mechanism level.