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    Punishment or reward: which works better on behavior?
    [ 2009-10-21 17:10 ]

     

    This is the VOA Special English Health Report.

    Two recent studies have found that punishment is not the best way to influence behavior.

    One showed that adults are much more cooperative if they work in a system based on rewards. Researchers at Harvard University in the United States and the Stockholm School of Economics in Sweden did the study.

    Punishment or reward: which works better on behavior?

    They had about 200 college students play a version of the game known as the Prisoner's Dilemma. The game is based on the tension between the interests of an individual and a group.

    The students played in groups of four. Each player could win points for the group, so they would all gain equally. But each player could also reward or punish each of the other three players, at a cost to the punisher.

    Harvard researcher David Rand says the most successful behavior proved to be cooperation. The groups that rewarded it the most earned about twice as much in the game as the groups that rewarded it the least.

    And the more a group punished itself, the lower its earnings. The group with the most punishment earned 25 percent less than the group with the least punishment. The study appeared last month in the journal Science.

    The other study involved children. It was presented last month in California at a conference on violence and abuse.

    Researchers used intelligence tests given to two groups. More than 800 children were ages two to four the first time they were tested. More than 700 children were ages five to nine.

    The two groups were retested four years later, and the study compared the results with the first test. Both groups contained children whose parents used physical punishment and children whose parents did not.

    The study says the IQs -- or intelligence quotients -- of the younger children who were not spanked were five points higher than those who were. In the older group, the difference was almost three points.

    Murray Strauss from the University of New Hampshire worked with Mallie Paschall from the Pacific Institute for Research and Evaluation. Professor Strauss has written extensively about physical punishment of children. He says the more they are spanked, the slower their mental development. He also looked at average IQs in other nations and found them lower where spanking was more common.

    What do you think are the best ways to correct misbehavior? Share your comments at voaspecialenglish.com.

    And that's the VOA Special English Health Report, written by Caty Weaver. I'm Steve Ember.

    spank: to slap or smack with the open hand, esp on the buttocks (用手掌、拖鞋等)打……的屁股(Mother spanked her for being naughty.媽媽因為她調皮打她屁股。)

    Related stories:

    Childhood bed-wetting: some advice for parents

    Deficits found in brain's reward system in A.D.H.D. patients

    Learning sometimes is not enough of its own reward

    Getting inside the complex mind of a baby

    (Source: VOA 英語點津編輯)

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