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

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

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

Dupin smiled at Germont. "How much money did you say the reward was?" he asked.

VOA: special.2009.12.26

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

If people cannot sense a reward, she says,then they might have difficulty completing an activity.

VOA: special.2009.09.16

Another is developing better ways to hire, keep and reward effective teachers and school leaders.

VOA: special.2009.07.30

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

VOA: special.2009.09.29

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

VOA: special.2011.01.15

The plan would reward effective schools and teachers with money and other recognition.

VOA: special.2010.03.18

"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 it also says it does not intend to reward Havana by lifting sanctions until it improves human rights conditions.

VOA: standard.2009.10.28

So,their reward for finding a scat is they get to play ball for two to three minutes and that keeps them good all day long."

VOA: standard.2010.02.22