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The brain loves revenge

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Posted: Wednesday, April 11, 2012 11:04 pm | Updated: 1:51 pm, Wed Jan 16, 2013.

A few years ago, I hired a man to sand the logs of my house. I asked for a list of references and I called them all.

When he sanded the logs, he accidentally sandblasted my picture windows as well, so my picture windows were now full of small holes. I decided to take revenge. I told him I would call everyone in his list of references and tell him about my experience. They would think twice before recommending him again, I figured.

He paid for the scarred windows.

But what if my tactic didn’t work and I had to call all those references. I wouldn’t have gained anything and I would have spent a lot of valuable time making all these calls.  

What would I have gained? Revenge.

People and even animals naturally want to take revenge for mistreatment, psychologists are finding out. They enjoy revenge so much that they will take a loss for it, the aptly named Swiss researcher Ernst Fehr found.

Here’s how the experiment went. They give two participants $10 each. You get the first move. If you give your $10 to the other player, the researcher will quadruple your gift and the other player gets $50. 

Then the other player gets a choice. He can keep all of the winnings. He can also share the winnings, giving you money back. Twenty-five dollars, an even split, would be fair, in my opinion.  

Where the other player hogs the $50 for himself, you can take revenge. You can take some money from your own pocket and give it to the researcher to take away money from the greedy hog.

Most people took revenge and punished the hog severely.

While they were making the decision whether or not to take revenge, their brains were scanned by positive emission tomography to see which parts of their brains were active.

The revenge-taking players enjoyed brain activity in their pleasure centers, and those who punished the greedy players the most got the most pleasure.

“Revenge is sweet,” the maxim goes, and PET imagery shows this is literally true.

Even animals take revenge, a German team of researchers found. They put one chimpanzee in a cage with a rope to a table filled with fabulous food. When the chimpanzee reached out and pulled in the table, he got a gourmet dinner.

If he pulled the rope instead, the table collapsed and all the food fell on the ground outside his cage.

Then the researchers put a second chimpanzee in the cage next to him. When one of them pulled the table so they could share the food, all was fine.

But when one of the chimpanzees pulled the table only over to him, the other outraged chimpanzee pulled the rope and dumped all the food on the ground outside his cage.

In other words, the chimp would rather neither one got the food rather than the other chimp getting it all.  

Many animal studies show this pattern, and female animals are most likely to take revenge — for reasons not understood. 

When a society can trust most of its members to play fair, it has tremendous advantages over non-trusting societies. Think of all the times people hand their credit cards to salespeople or order on the Internet with confidence that the charge will be correct and the item will arrive. 

We take pleasure in taking revenge when we have been cheated. That’s why so many of us enjoy our revenge fantasies even when we know we won’t act them out. 

How do we cut the cycle of revenge?  

A sincere apology may be s all that is necessary. Doctors who make a mistake and apologize, rather than covering it up, are sued far less often than other doctors, researchers at the University of Washington Medical School found. 

The guy who ruined my windows while sandblasting my logs did apologize and pay to replace the windows. Justice had been done, so I didn’t seek revenge.   Maybe the primitive pleasure in revenge underlies the desire for justice.

Judith Kleinfeld, a long-time columnist for the Daily News-Miner, holds a doctorate from Harvard and is a psychology professor emeritus at the University of Alaska Fairbanks.

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