A meta-analysis of the results from 475 studies found that the average person who received therapy shows more improvement than about 80% of similar people who were not in therapy.

Meta-analysis

A statistical technique that combines the results of multiple studies to identify patterns, effects, or relationships in the data more effectively than in individual studies.

Therapy

A treatment intended to relieve or heal a disorder, often involving talking to a psychologist about one's problems and issues to find solutions.

Improvement

The process of becoming better through making changes or adjustments.