★ Written by a leading expert in personality research, this book draws on a wide range of studies to address the central question of whether personality can change.
★ It dissects how key life milestones—such as education, career, and marriage—affect one’s character, and presents the results of real‑world experiments on personality transformation.
★ Featuring findings that challenge common assumptions, it upends conventional notions about personality, helping those troubled by self‑analysis reconnect with their true selves while offering fresh insights for those who judge others.

What should you do if you feel disappointed by the results of personality tests online?

In recent years, personality tests have become extremely popular, especially among young people. However, when the results don’t align with their self‑image, many people begin to wish, “I want to be this kind of person” or “I want to change myself.”

In this book, the author, a leading expert in personality research, addresses the question “Can personality really be changed?” and explores it in light of various studies. The book examines how major life transitions—such as continuing education, entering the workforce, and marriage—affect one’s personality, and it presents experimental findings on efforts to transform character. It also includes some research findings that challenge common assumptions.

Whether you’re troubled by frequent demands for self‑analysis at work or school, or whether you find yourself in a position where you must evaluate others, this book will help you reconnect with your true self and gain fresh insights.