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获得他人相助,人们通常会送上礼物表示感谢。德国研究人员发现,黑猩猩也会如此做。它们愿意对施以援手的同伴“投桃报李”,慷慨酬谢。
德国马克斯·普朗克协会日前发布新闻公报说,研究人员使用拉拽实验装置,让黑猩猩面临两种选择,一种是自己获得食物,另一种是与同伴合作获取食物。结果显示,所有在同伴协助下获得食物的黑猩猩都会与同伴分享美食。尤其当同伴不惜冒着自己吃不到食物的风险来帮助时,黑猩猩会表现得非常大方。
研究人员说,实验表明黑猩猩在特定情况下会对同伴表达感激之情,而且令人意外的是,为向同伴表示感谢,黑猩猩会做出自我牺牲,放弃部分美食。先前人们认为,黑猩猩在这种情况下只会在乎自己的利益。
研究还发现,黑猩猩甚至能估算同伴的帮助值得多大回报,同伴帮助它们时承担的风险越高,它们越愿意付出与风险相应的回报。研究人员说,物质奖励是人类合作的核心组成部分,而实验表明,黑猩猩的行为也符合相关社会合作的博弈理论模型。(记者郭洋,编辑鲁豫,新华国际客户端报道)
原标题:涨姿势!研究人员发现黑猩猩也会“投桃报李”
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