Mild Mental Retardation
About 85% of persons that are Mental Retarded fall into this group. |
IQ level 50-55 up to about 70 |
Moderate Mental Retardation
About 10% of persons that are Mental Retarded fall into this group. |
IQ level 35-40 to 50-55 |
Sever Mental Retardation
About 3% to 4% of persons that are Mental Retarded fall into this group. |
IQ level 20-25 to 35-40 |
Profound Mental Retardation
About 1% to 2% of persons that are Mental Retarded fall into this group. |
IQ level below 20 or 25 |