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3、 improve their social status, said Professor Ryan.Generally, people believe that the hormone oxytocin is let out in our body in various social situations andour body creates a large amount of it during positive social interactions (互动) such as falling in love or giving birth.But in a previous experi
4、ment Professor Ryan found that the hormone is also let out in our body during negative social interactions such as envy.Further researches showed that in men the hormone oxytocin improves the ability to recognize competitive relationships, but in women it raises the ability to recognize friendship.
5、Professor Ryans recent experiment used 62 men and women aged 20 to 37. Half of the participants（参与者）received oxytocin. The other half received placebo (安慰剂).After a week, the two groups switched with participants. They went tlirough the same procedure with the other material.Following each treatment
6、, they were shown some video pictures with different social interactions. Then they were asked to analyze the relationships by answering some questions. The questions were about telling friendship from competition. And their answers should be based on gest赕(鵑偀崁礂虡楡搀漀挀虡楡搀漀挀尀尀昀愀攀愀戀戀昀愀昀昀挀愀愀圀攀焀瀀刀儀愀洀礀戀欀氀伀
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