introversion
n. 内省性，内向性
例句
Introversion is now a second-class personality trait, somewhere between a disappointment and a pathology.
内向如今是第二等人格特征，介于失望和病态之间。
The Introversion Test: Personality Characteristics of introverts.
内向性格测试：个性特征。
The Introversion Test: At Work, School or Home &Introverted Personality Traits
内向性格测试：工作中、学校或家里的性格表现
