Can a nerdy child grow up to be an aggressive tycoon? Can a childhood bully develop into a mild-mannered librarian?

Psychologists have debated for a hundred years whether our personalities develop mainly in early childhood or continue to change and grow throughout our lives. Sigmund Freud was the first to state that personality is formed in early childhood and basically stays the same throughout adulthood.

Now research seems to back up Freud’s contention.

A new study, which appears...
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