2 weeks later after the fact, their were drawing materials placed out during playtime. Not once were they asked to draw.

Children in both Unexpected and Control groups where the ones who spent the most time drawing. The other group the Expected group; however, spent the least amount of time drawing.

The results of this experiment shows that if you mention the reward before hand they are least likely to seek out the reward.

Experts tested this out more on adults and more children which concluded to be the same results.

54. People are more motivated by intrinsic rewards than extrinsic rewards