Motivation sources inventory: Development and validation of new scales to measure an integrative taxonomy of motivation

Scales are developed and tested based on an integrative taxonomy of motivation sources. The sources, as measured on the Motivation Sources Inventory include intrinsic process, instrumental, external self-concept, internal self-concept, and goal internalization. The development procedures produced five subscales with six unique loading items per subscale that seem to capture the domains of interest for each source of motivation. Proposals for research using the inventory are also discussed.