She says people might have difficulty completing an activity if they cannot expect some kind of reward in return.

VOA: special.2009.09.29

But each player could also reward or punish each of the other three players, at a cost to the punisher.

VOA: special.2009.10.21

She said the new law will reward quality over quantity of care, creating a system that prevents diseases before more costly treatment is required.

VOA: special.2010.04.21

The king permitted nothing to interfere with his great method of punishment and reward.

VOA: special.2011.01.15

"There was a lower concentration of dopamine markers in the brain of individuals with A.D.H.D., specifically in the areas of the brain that are involved with reward and motivation."

VOA: special.2009.09.29

But we don't believe that while there are repressive measures in place in Cuba that we should reward the government of Cuba by lifting the economic sanctions that could assist the government of Cuba in its repression of its own citizens."

VOA: standard.2009.10.28

"It's also a wonderful concept to reward a woman from each of the five major regional areas in which science is being conducted around the world, in a celebration of not only women in science, but also the importance of science in a world community."

VOA: standard.2010.03.29

"Back before there were any awards of any kind for this kind of music, the reward for a blues man was a pocket full of change , some bills at the end of the night, and the knowledge that you've got a place to sleep out of the rain and the wind.

VOA: standard.2010.08.04