Monireh Abdoos - Computer Engineering Department- Iran University of Science and Technology-Tehran- Iran
Nasser Mozayani - Computer Engineering Department- Iran University of Science and Technology-Tehran- Iran
Ahmad Akbari - Computer Engineering Department- Iran University of Science and Technology-Tehran- Iran

In this paper, we present a new measure for evaluating similarity changes in a multi agent system. The similarity measure of the agents changes during the learning process. The similarity differences are because of any composition or decomposition of some agent sets. The presented measure, defines the changes of homogeneity of agents by composition and decomposition. The utility of the metrics is demonstrated in the experimental evaluation of multi agent foraging. The results show that while the similarity difference gets a positive value, the performance grow rapidly.