Final answer:
Equity theory proposes that perceptions of fairness directly affect worker motivation.
Step-by-step explanation:
The motivation theory that proposes that perceptions of fairness directly affect worker motivation is equity theory.
Equity theory, developed by J. Stacy Adams in 1963, suggests that individuals are motivated when they believe they are being treated fairly in comparison to others. According to this theory, if workers perceive that their inputs (effort, skills, time) are equal to the outcomes they receive (pay, recognition, benefits), they will be motivated.
For example, if a worker believes that they are putting in more effort and receiving less compensation than their coworkers, they may become demotivated and may feel that the workplace is unfair.