IQ in moderate mental retardation -
WHO classification of Mental retardation(MR) mild MR...IQ 50-70 moderate MR ...35-49 severe MR..IQ 20-34 profound MR...IQ under 20 ref; (page no;582) 23rd edition of PARK&;s textbook of Preventive and Social medicine
90-70
70-50
50-35
35-20
Social science, Mental health & Genetics