Before revision:  Measure of consensus in attitudinal graph reflects how easy or difficult consensus can be reached that is acceptable by everyone. Frustration index is one such measure as it determines the distance of a network from a state of total structural balance.
After revision:  A signed graph is called balanced if each of its cycles includes an even number of negative edges. Balance is often characterized by frustration index or by finding a single convergent balanced state i.e. network consensus.