Degree of retardation
IQ range 84 -70 Educational Terminology : Slow learner Phychological Terminology : Borderline Prevalence : - Prototype : Slow learner Academic Potential : educable to grade 6 Daily Living : Fully independent Work : employable IQ range 69 - 55 Educational Terminology : Educable Phychological Terminology : Mild Prevalence : 2.5% Prototype : Socio-economically deprived Academic Potential : reading & writing at 4 th - 5 th grade or less Daily Living : Relatively Independent Work : Needs special training IQ range 54 - 40 Educational Terminology : trainable Phychological Terminology : moderate Prevalence : 0.3% Prototype : organic mental retardation Academic Potential : limited reading, 1 st and 2 nd grade Daily Living : can dress, use toilet, prepare food Work : sheltered employment IQ range 39 - 25 Educational Terminology : Sub-trainable Phychologi...