<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (May 2009) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (May 2009) (Learn how and when to remove this template message) </Td> </Tr> <P> A process theory is a system of ideas that explains how an entity changes and develops . Process theories are often contrasted with variance theories, that is, systems of ideas that explain the variance in a dependent variable based on one or more independent variables . While process theories focus on how something happens, variance theories focus on why something happens . </P>

A classification of motivation theories (content vs. process)