Several large research studies conducted over the past few years show that a person's personality naturally changes over the course of adulthood, in response to life events such as entering a committed relationship or advancing in a career.

过去几年展开的几项大型研究显示，受生活事件影响（比如形成稳定的恋爱关系或者在职业生涯中取得进展），人的性格会在成年的过程中自然地发生变化。

From the ages of 20 to 65, people report increases in positive traits, such as conscientiousness, and decreases in negative traits, such as neuroticism. Most people tend to become more agreeable, more responsible, more emotionally stable -- in other words, their personalities improve. Psychologists call it the Maturity Principle.

图表：随年龄变化的性格特征从20岁到65岁，责任性等正面性格特征会增强，而神经质等负面性格特征则会减弱。大多数人往往会变得更随和，更有责任感，情绪也更稳定——换句话说就是，他们的性格会变好。心理学家将这种现象称为“成熟定律”(Maturity Principle)。

Researchers have also long known that friendly, outgoing, responsible people tend to be happier than shy, irresponsible, unsociable people. But in a new twist with lots of ramifications for therapists, researchers have learned that being happy to begin with may help change your personality.

研究人员很早以前就发现，友善、开朗、有责任感的人往往比害羞、没有责任感和不爱交际的人更快乐。但一项新的研究显示，保持快乐的心情也许有助于改变你的性格，这项新突破可能会对心理治疗师产生诸多影响。

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