Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

a theory of work motivation positing that the degree of effort put out by workers will rely on a mixture of three variants: (i) the expectancy of workers that their effort will generate success at the task, (ii) the workers' belief that success will generate specific results, and (iii) the worth of these results. A numerical value can be attained for variant (s) utilizing the subjective likelihood approximates of workers, for variant (b) by gauging the correlation of performance to rewards, and for variant (c) by requesting the workers to score the desirability of the rewards.

VALENCE-INSTRUMENTALITY-EXPECTANCY THEORY: "The Valence-Instrumentality Expectancy theory was originally introduced by Victor I. Vroom, a Canadian organizational psychologist."

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