👉 In psychology, "subnormal" refers to a condition where an individual's mental abilities or performance are below average relative to their chronological age. This can be due to various factors such as mental disorders, medical conditions, accidents, or simply being born with a lower-than-average intelligence level. Subnormality is often associated with the term "low IQ," which refers to a score on the Intelligence Quotient (IQ) test that falls below average compared to other individuals of similar age. This can