-Equity Theory-
focuses upon a person’s perceptions of fairness with respect to a relationship. During a social exchange, an individual assesses the ratio of what is output from the relationship to what is input in the relationship, and also the ratio of what the other person in the relationship outputs from the relationship to what is input into the relationship.

it posits that if the person perceives that there is inequality, where either their output/input ratio is less than or greater than what they perceive as the output/input ratio of the other person in the relationship, then the person is likely to be distressed.

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body..

i am distressed.. haha.. how? give incentive? ahahaha...