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With the network technology and distributed technology, computer supported cooperative work (CSCW) has become a hot research field of computers , while computer-aided instruction (CAI) in the field of computer -supported collaborative learning (CSCL) along with the network the development of teaching and development . CAI CSCL and CSCW technology combines to make up for a long time interactive online teaching issues such as inadequate , has emerged as one of the main forms of online teaching . Role problem has always been an important issue in CSCL research , CSCL role assignment is a critical step in the learning process , role assignments will directly affect the efficiency of collaborative learning . People have been assigned the role of research on CSCL insufficient , the first is the concept of a single character , in most CSCL system, there are only two roles of students and teachers , and the role of students lack of division of labor, not a single student roles and activities of the rich collaborative learning match. Secondly, in the traditional CSCL , the lack of role models and the role of formal analysis and research . Third , the traditional lack of role assignments CSCL research , the role assignment often done manually through the teacher , there is no combination of artificial intelligence technology to achieve the role of automatic and intelligent distribution . In contrast to other areas of computer science , the role concept is being made great strides. People on the role of research began in the theater, and gradually came to be applied to all areas of society especially in the computer field : In the field of software engineering , such as object-oriented modeling process, the roles are used to describe objects in the system , and the resulting role -oriented information system modeling , the emergence of object Role Modeling (ORM) and role-based construction modeling language (RBML) , etc. : Agent- oriented programming, roles are used to describe the Agent in the system identity , resulting in the MAS uses role-based modeling ; in distributed database management, the role of the resource is used to describe the object 's authority to operate , the performance of role-based access control of data . Therefore , domestic use in a distributed system environment has been a lot of research role assignment . With the development of online teaching and CSCL , the number of students increased, the role of the traditional distribution method CSCL
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