Does the work's meaning and purpose come from inside or does the work require big external incentives? (inc.com)
Well - meaning educators intervene, and praise, rewards, and external incentives surface. (edutopia.org)
A small number of studies did suggest that a combination of feedback with external incentives, like cost savings, could be effective, but there was not enough research to help the researchers understand its effectiveness. (sciencedaily.com)