**Three types of Relationships Between Effort and Reward. **

Effort and reward exhibit three distinct relationships. The first is a linear relationship, where increased effort directly correlates to increased rewards, typically seen in straightforward, repetitive tasks. The second is a diminishing returns curve, where initially higher effort yields reasonable rewards, but additional effort produces progressively lesser returns, often observed in creative and problem-solving endeavors due to cognitive limits. Lastly, the inverted curve demonstrates scenarios where increased effort can lead to negative outcomes, particularly in social interactions, where attempting to control perceptions can backfire, causing a decrease in respect or trust. This highlights the complexities of how effort interacts with reward in various contexts.