He says they might be trying to increase their dopamine levels to make up for the deficits in their reward system.

VOA: special.2009.09.16

He says they might be attempting to increase their dopamine levels to make up for the deficits in their reward system.

VOA: special.2009.09.29

They battle and survive a Mississippi flood for the reward of returning to state prison as the tall man did in the story "Old Man."

VOA: special.2010.01.10

Researchers say they observed shortages in the brain's reward system in patients with A.D.H.D.

VOA: special.2009.09.29

"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