Oddly Wired
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motivation

You only act when the result seems possible.

Expectancy theory states that motivation is the multiplicative product of three factors: expectancy (that effort leads to performance), instrumentality (that performance leads to a reward), and valence (the value the individual places on that reward).

The original claim incorrectly reduced the theory to two components, omitting valence, which is required for the full calculation of motivation.

Your drive is a calculation, not just a desire.

Where this comes from

Study
Vroom, 1964, Work and Motivation
What the check found
Vroom's formula for motivation requires three components—expectancy, instrumentality, and valence—not just two.
Confidence
Well replicated

Related

One of these every day, and every one names the study it came from. When a finding is contested, it says so.