Answer:
Sociogram and census.
Explanation:
First, Sociograms let you understand the interaction of every member of the group with the rest of the group´s members. Whether positive or strong, weak or strong, Sociograms let you perceive the flux of human relations. Second, the census lets you figure out all the characteristics of the group's members. With these two very efficient tools you can understand perfectly any group and its dynamic. Both are research tools in social psychology.
