News ID: 207065
Published: 0241 GMT December 28, 2017

Is punishment an effective tool to make humans cooperate?

Is punishment an effective tool to make humans cooperate?

A new study says that punishment can have an overall demoralizing effect on individuals who get punished on multiple occasions.

Punishment might not be an effective way to get people to cooperate for the common good, a study has found. Human societies maintain their stability by forming cooperative partnerships. However, cooperation often comes at a cost. For example, a person taking time to raise alarm in order to alert other members of a group to impending danger could be losing valuable time to save oneself, Hindustantimes reported.

It is unclear why natural selection favours cooperativeness among individuals who are inherently selfish. In theoretical studies, punishment is often seen as a means to coerce people into being more cooperative. Researchers led by Marko Jusup of Hokkaido University in Japan and Zhen Wang of Northwestern Polytechnical University in China conducted a “social dilemma experiment”.

Two hundred and twenty-five students in China were organised into three trial groups and played 50 rounds each of a game. In group one, every student played with two opponents which changed every round. The students could choose between “cooperate” or “defect”, and points were given based on the combined choices made.

If a student and the two opponents chose “defect”, the student gained zero points. If they all chose “cooperate”, the student gained four points. If only a student chose to defect while the other two chose to cooperate, the gain for the student was eight points. The second group was similar to the first one in every aspect except that the people playing the game with each other remained the same for the duration of the 50 rounds, enabling them to learn each other’s characteristics. In the third group, players also remained the same. However, a new option, “punish”, was introduced. Choosing punishment led to a small reduction in points for the punisher and a larger reduction of points for the punishees.

 
 
 

At the end of the game, overall points were counted and the students were given monetary compensation based on the number of points won. The expectation is that, as individuals play more with the same opponents over several rounds, they see the benefit of cooperating in order to gain more points. In theory, it is expected that applying the punishment option would lead to more cooperation.

   
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