What Is Moderate Mental Retardation?
What Is Moderate Mental Retardation? The DSM-IV classifies mental retardation into four stages based on severity: mild (IQ score of 50-55 to approximately 70), moderate (IQ score of 30-35 to 50-55), severe (IQ score of 20-25 to 35-40), and profound (IQ score of less than 20-25). What causes moderate mental retardation? trauma before birth, such