The equity theory of relationships is based on a theory developed by workplace and behavioral psychologist John Stacey Adams. It explores the perceptions of humans regarding their inputs in the relationship and the outcomes they get.
Equity theory of relationships has pointed out some behavioral patterns of individuals to resolve relationship issues. Individuals will try to restore balance if they feel they are being unfairly treated and they will seek to maximize their outcomes. The perception of inputs and outcomes is individualistic and therefore difficult to quantify. This theory basically points out that the strongest urge is to restore balance and maintain fairness in a relationship.