Abstract: A difficulty for interactive group evaluation is the aggregation of evaluation information. The relevant researches in China rarely discuss the issue from the perspective of information aggregation operator. To make up this deficiency, and taking into consideration that information distribution density is an important character of interactive group evaluation information aggregation, a new method of interactive group evaluation information aggregation method is proposed in this paper based on interactive density operator. Two new operators-interactive density arithmetical weighted operator (IDWA)and interactive density geometrical weighted operator (IDWGA)are proposed, and relevant properties of the two new operators are discussed. In addition, the way to determine the density weighted factors of the two operators is introduced. At last, the new method is applied in an example to illustrate its effectiveness. A new research idea of interactive group evaluation information aggregation problems is provided in this paper.

Key words: group evaluation, IDWA operator, IDWGA operator, information aggregation