In 1890,William James argued that "by age 30,the character [personality] has set like plaster and will never soften again." Has psychological research supported his assertion?

Question

Quizplus · Accepted Answer

Psychological research has shown that there is some truth to William James' assertion that personality is relatively stable after a certain age, but he underestimated the age at which change is reduced. Studies have found that personality traits do tend to become more stable by the age of 30, but continue to change, albeit at a slower pace, throughout adulthood. Some changes may be influenced by life events or environmental factors, but there is also evidence of intrinsic maturation and growth that can lead to changes in personality over time. The extent to which personality is stable or malleable also varies across different cultures, which suggests that socialization and environmental factors play a role in shaping personality throughout the lifespan.

In 1890,William James Argued That "By Age 30,the Character [Personality]