What is expectancy theory by Vroom?

Victor Vroom's Expectancy Theory explains human motivation through the relationship between effort, outcomes, and rewards. It is based on three key components:

1. Expectancy — a person's belief that effort will lead to the achievement of a certain result.
2. Instrumentality — the belief that achieving the result will lead to a reward.
3. Valence — the value or attractiveness of the reward to the person.

Motivation arises when a person is confident that their efforts will lead to a desired outcome, and that this outcome will be rewarded with something valuable to them.

Example: an employee believes that if they complete a challenging project (expectancy), they will receive a promotion or bonus (instrumentality), which is truly important to them (valence). Then, their motivation will be high.

This theory helps managers understand how to set up reward systems and goals to increase employee motivation.