Running Head: AGING AND PERSONALITY CHANGES

Many psychologists discuss personality in terms of trait theory. As far back as the ancient Greek physician Hippocrates, it was believed people could be described in terms of categories. Hippocrates’ categories were melancholic (depressive), choleric (touchy and irritable), sanguine (cheerful and optimistic), and phlegmatic (calm, but tending to listlessness). ................
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