I believe the answer is: A just-noticeable difference
In painting, A just-noticeable difference refers to the amount of things that needed to be change for a difference to be noticeable.
The threshold usually depended on the type of audience that being aimed toward, (for common audience, the threshold of differences would be relatively higher compared to expert audience)<span />
According to the DFID, State-society relationship is the relationship between state institutions and societal groups to discuss how public authority is implemented and how it can be swayed by people. Also, the state is independent: not subject to the total control of other organizations, but serves as a base to control other organizations.