Luyện nghe bản tin tiếng Anh y khoa VOA 122

luyện nghe tiếng anh y khoa 122
luyện nghe tiếng anh y khoa 122

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. They had about two hundred 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 twenty-five percent less than the group with the least punishment. The study appeared in September in the journal Science. The other study involved children. It was presented in September in California at a conference on violence and abuse. Researchers used intelligence tests given to two groups. More than eight hundred children were ages two to four the first time they were tested. More than seven hundred 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 And that’s the VOA Special English Health Report.

Words in This Story

punishment  – n. the act of punishing someone

influence  – n. the power to have an effect on people or things, or a person or thing that is able to do this

cooperative  – adj. willing to help or do what people ask

reward  – n. something given in exchange for good behaviour or good work, etc

tension  – n. a feeling of nervousness before an important or difficult event

gain  – v. to get something that is useful, that gives you an advantage, or that is in some way positive, especially over a period of time

cooperation  – n. the act of working together with someone or doing what they ask you

reward  – n. something given in exchange for good behaviour or good work, etc

abuse  – v. to use something for the wrong purpose in a way that is harmful or morally wrong

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