Visual work memory is an important part of the classic work memory model proposed by Allan Baddeley and Graham Hitch，Responsible for processing and storage of visual information，Including the color of the stimulus、shape、size、Activities, etc.。Current，The results of many behavioral experiments and brain neuroscience studies have been expressed，Visual work memory can also be further subdivided into object work memory and space work memory，The former is the size of the object、Color and shape, process and store，and the latter is mainly responsible for processing and storing the space location information of objects。There is less processing information involved in space work memory，So，The focus of academic research is mainly in the field of object work memory。In the study of the memory of visual object work，For more than 20 years，A focus problem that researchers are committed to solving are: What is the storage mechanism of visual object work memory，What is the specific storage unit in the memory system? This，Researchers proposed three controversial theories based on the corresponding experimental results。

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1997，Steven Luck and Edward Vogel use the change detection paradigm，Examine its storage unit while measuring the memory capacity of visual work。The sample stimulus, which is composed of a different number of single -specific or multi -characteristic objects (such as a green block or color line segment) to the subject in the experiment，Detective stimulation after a short interval，Requires the subject to determine whether the bet365 best casino games objects in the stimulus are the same as the sample stimulation。They first compared the memory scores of monochrome blocks and two -color nested blocks (such as a small green block in the middle)。Under the same number of blocks presented，The memory scores of two -color blocks and monochrome blocks do not have significant differences。It must be clear，The amount of color contained in the two -color blocks that the subject need to remember in the experiment is twice the monochrome block。As a result, I found，There is no significant difference between the memory performance of the same number of single -symbols and multi -characteristic objects of the same amount。In the experiment later，They also use stimulating materials containing different dimensions to detect。For example，In an experiment，Sample stimulation and detection stimulus to the subject，Each group of stimuli has four line segments that contain different orientations and colors。The judgment task of detection stimulation is divided into three types: task 1，Determine whether the color changes (facing the constant); task 2，Determine whether orientation is changing (constant color); task three，Determine whether the orientation and colors have changed。In the Test of Mission One and Task II, the test that requires 4 features，and 8 features (4 colors and 4 directions)。The results show，Among the above three tasks，There is no significant difference in the accuracy of the memory of the subject。

For this，They think，The storage unit in the visual work memory is the object of integration -whether the object is composed of the characteristics of the same dimension or the characteristics of different dimensions (such as color -outflow segment)，Visual work memory Bet365 app download capacity depends on the number of objects rather than the number and type of characteristics。This view is called "Object-based theory"，Also called "Strong Pass" hypothesis。For example，If our visual object work memory system is a big cake，It has many different colors in it、small cakes composed of shape or other surface features，Each small cake is an independent unit。At present, there are many behavioral experiments and neuroscience research results to support this theory。

Characteristic storage theory

After the "object -based storage theory" was proposed in Lark and Vogle，Other researchers conducted in -depth discussions on the storage unit of visual work memory，The results obtained are different from them。For example，I. R. Olson and Y. Jiang also used two -color nested squares and monochrome blocks in its experiments in 2002 as stimulating materials，As a result, I found，Under the same number of objects，The memory score of the subject of the two -color nested block is significantly lower than that of monochrome blocks。So，If the number of features within the same dimension contained in the object increases，Then the storage capacity of the objective work memory system will be reduced。This result has also been supported by many other experimental research。For example，Wu Wenchun and Jin Zhi adopted objects composed of the same attribute characteristics in 2006 as memory materials，Through two experiments，Compared with different color features, respectively、The total number of objects and the same color features、Memory results under the total number of objects under different conditions。Experiment 1 results found，Test three features (1 respectively、2、3) There is a significant difference bet365 live casino games in memory performance，The more the color contained in the object，The lower the memory score。Experiment 2 results found，The same number of features、In the case of different total number of objects，There is no significant difference in the memory score of the subject。

The results of the above research show，When the object has different values ​​on the same feature dimension (such as color) at the same time (such as red blocks and red -green two -color nested blocks)，The storage unit of visual work memory is characterized; although the integrated object (red triangle) is also a storage unit for visual work memory，But the memory capacity mainly depends on the number of feature values ​​instead of the number of objects，And the storage of the characteristics and the object occupies a storage system，Competitive memory resources between them。This view is called "Feature-Based theory"，Also known as "The Theory of Breeding"。2018，Wang Jing、Xue Chengbo and Liu Qiang adopt the experimental results of the memories paradigm and meaningful objects as materials.，Dual -featured objects of the same dimension cannot be stored in memory。

　Dual storage theory

M. E. Wheeler and A. M. Treisman also used the experimental paradigm of Lark and Worder in 2002，and two -color nested squares and monochrome blocks (divided into large monochrome blocks and small monocular blocks，All of them are solid) as a conscious material，The results obtained are also different from it: the memory score of the test of the two -color nested block is significantly lower than the monochrome block of the same number。Based on this，They think，The characteristics of each dimension have a special special storage area for each other，Limited capacity，Different features of the same dimension (such as yellow、Blue) Common resources with bet365 best casino games limited competition，The more features contained in objects，The worse its memory scores are。other，They also examined the storage method of graphics composed of two different dimensions in visual work memory，and compare the memory scores of a single feature change condition (only color or shape) and characteristic interchange changes (the two features of the detection items belong to the two different graphics of the records)。They assume，If the characteristic information contained in the stimulus is stored in the memory memory of the visual object，Then change perception of changes under the conditions of feature exchange should not be less than less than a single feature change condition.。As a result, I found，The correct rate of perception of the correct rate under the condition of characteristics of characteristics and changes in feature exchange is not significantly different。This result indicates，Test the object characteristics of different dimensions can be stored in parallel，The objects that are integrated through the characteristic room，The storage of its binding relationship does not consume or consumes small dimensions of each dimension characteristic storage capacity。

Based on the above experimental results，They proposed a dual storage mechanism (Dual-Storage Mechanism) hypothesis，That is dual storage theory。This theory thinks，When the object consists of different characteristics of the same dimension，Its storage units are features，When the object consists of the characteristics of different dimensions，Its storage unit is an integrated object。Dual storage theory also received many research support。For example，Wu Wenchun and others use two -dimensional dual -characteristic graphics and three -dimensional bet365 best casino games dual -featured graphics (including two basic features or one basic characteristics and one detail characteristics) as memory materials to inspect their storage mechanism，Discovered all the results，The graphics composed of two different dimensions can be stored in the memory memory memory of the visual object。

Integrity，Compared with object -based storage theory and characteristic storage theory，Dual storage theory looks more flexible and has higher explanation，Researchers have higher recognition of it，But the controversy still exists。Research results such as Shen Mo and others show，The visual graphics composed of two basic features can be stored in integration objects，and the object consisting of a basic characteristic and one detail characteristics cannot be stored in a integrated unit。Researcher Explanation，This phenomenon is likely to reflect that the characteristic storage and binding relationship storage in the dual storage mechanism requires different attention resources，That is, the binding relationship between the characteristics of the parallel encoding consumption is less resources.，Therefore, it is easier to store the object in an integrated object; and the characteristics of the series of codes (such as the open -minded) consume more attention to resources，Therefore, there are fewer resources that can be distributed to the binding relationship，Therefore, it is difficult to store the object in an integrated object。These research results indicate，Even the Divcet Expedition Stimulation，Is the storage unit of its visual work memory of whether it is object or feature，It is also necessary to depend on the type of characteristics of the object。Follow -up research can consider using other research paradigms or through interdisciplinary bet365 best casino games methods to further explore。

(Author Unit: College of Education and Science, Hanshan Teachers College)