Abstract: Currently, the numbers of multi-stage dynamic interactive croup evaluation studies is very small, and most of them base on point value evaluation information. Furthermore, most group evaluation studies neglect intrinsic logical link between rating range and variable evaluation information. To overcome these kinds of shortage, a multi-stage dynamic interactive group evaluation method is proposed based on interval information. The characteristics of interval evaluation information in interactive group evaluation are analyzed firstly, then the design idea of rating interval reset algorithm is put forward. Accompanied evaluation information changing, this algorithm can realize synchronously adjusting the rating range, promoting interaction progress and making evaluation information tend to be stable. Then, from the stability perspective, the paper defines stability of indicator index to explore the interaction termination' s base. Finally, a numerical example is given to show the feasibility and validity for the method.

Key words: interval number, rating range, normal distribution, group evaluation, interaction