Expectancy Theory

What is Expectancy Theory?

Expectancy theory explains motivation in terms of the outcomes people expect and how much they value them. Associated with Victor Vroom, it asks why a person might put effort into one task and little into another.

Expectancy, instrumentality and valence

• In a common work-related formulation, expectancy is the belief that effort can lead to performance.
• Instrumentality is the belief that performance will lead to an outcome.
• Valence is the value the person places on that outcome.

The initials give the related name VIE theory: valence, instrumentality and expectancy. A common teaching formula is motivation = expectancy × instrumentality × valence. It highlights how a weak link can limit motivation, but it simplifies the fuller models discussed below.

These are different questions: Can I do it? Will doing it get me something? Do I want that thing?

Examples of Expectancy Theory

Workplace performance

A worker may want a promotion but doubt that extra effort will improve their performance. Or they may believe they can perform well but think promotions depend on something else. Offering a more attractive promotion does not necessarily address either doubt.

Education

A student might value a scholarship yet doubt that studying will improve their grades, or that those grades will be enough to qualify. The model separates those beliefs from the value of the scholarship itself.

Evidence and measurement

Van Eerde and Thierry's meta-analysis (1996) examined 77 studies and found important differences in how researchers measured the concepts and outcomes. A simple multiplication diagram is a teaching summary, not a complete description of Vroom's original models.

Why it matters

“They are not motivated” leaves a lot unexplained. Expectancy theory offers more specific questions about effort, performance and rewards. Differences in what people value are part of the theory, not an exception to it.