Sociometry analysis applying fuzzy node fuzzy graph

Sociometry is a social structure measurement and evaluation method, which we can effectively analyze by applying fuzzy graph theory. We extend the fuzzy graph theory, and propose a fuzzy node fuzzy graph, and we transform it to a crisp node fuzzy graph using by T-norm. The authors explain a fuzzy node fuzzy graph, and propose new T-norm family quasi logical product. By using this new T-norm, we could reasonably transform the fuzzy node fuzzy graph to the crisp node fuzzy graph.