What tremendously influential personality psychologist published research that looked at 7,000 patients and concluded that those who received treatment were no better off than those who did not?

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Hans Eysenck, a prominent figure in the field of personality psychology, conducted extensive research on the effectiveness of psychotherapy. His controversial study, which analyzed around 7,000 cases, concluded that patients who underwent treatment showed no significant improvement over those who did not receive any therapy. This finding sparked significant debate and further research into the efficacy of psychotherapeutic interventions.

What Tremendously Influential Personality Psychologist Published Research That Looked at 7,000