Emil Kraepelin is best known for his contributions to the study of schizophrenia. He introduced two new diagnostic categories of disordered behavior - dementia praecox and manic-depressive insanity - based on symptom differentiation, _________________, and ________________.

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Kraepelin's diagnostic categories were primarily based on differentiating symptoms rather than understanding physiological mechanisms, and he did not focus on evaluating prognosis. Instead, his goal was to establish clear diagnostic criteria that could accurately identify and differentiate between different types of disordered behavior. Consequently, he believed that the symptoms themselves were the most important factor in classifying mental illness, rather than broader concerns about etiology or long-term outcome.

Emil Kraepelin Is Best Known for His Contributions to the Study