The study showed that while people have an inborn predilection toward independence and self-confidence, about 70 percent of this personality trait is affected by a person's environment and lifetime experiences.
Pedersen's studies, with various collaborators, probe the aging process by comparing sets of twins, both identical and fraternal, many of whom were separated at an early age.
The subjects were drawn from a roster first compiled about 30 years ago registering all twins born in Sweden since 1886. The complete list, which was extended in 1971, has 95,000 sets of twins.
有些人天生相信他们是自我生命的主宰,其他人则觉得他们受到命运的支配。
一项新的研究发现这些感觉部份来自基因。
心理学家早就知道有信心掌握自己命运的人比那些觉得自己是受命运摆布的人更能适应老化。
两位研究学家在询问了好几百对瑞典的双胞胎后报告说,这种信心,或是信心的缺乏,一部份是与基因有关,另一部份则是来自经验的累积。
他们同时发现,相信盲目运气的人--认为巧合在生命中扮演一个很重要的角色--是在生活过程中学习而来的,与遗传毫无关系。
这项研究是在卡洛林司卡机构里进行的。这个机构亦是每年颁赠诺贝尔医学奖的团体。该研究是由此机构的南西·皮德森与洛杉矶南加大的心理学教授玛格丽特·贾兹所主持,他们这项研究结果最近在美国老年学的期刊上登出。
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