The study examined the effects of adult surveillance and extrinsic rewards on children's intrinsic motivation. 80 young children participated in an art activity in one of four conditions: expected rewards with surveillance, unexpected rewards with surveillance, expected rewards without surveillance, or no rewards without surveillance. The results found that both surveillance and the expectation of an extrinsic reward decreased the children's interest in the art activity when measured two weeks later. The findings agree with previous research that extrinsic incentives can undermine intrinsic interest, and that being observed during an activity can decrease interest.