Concord Special Education Parent Advisory Committee

Full Scale IQ Scores

Other sources generally cite IQ scores and their labels:

below 20	Profoundly Intellectual Impairment (old term: Profoundly Mentally Retareded (MR)
20-34	Severe Intellectual Impairment (old term Severe Mentally Retarded (MR)*
35-49	Moderate Intellectual Impairment (old term Moderate Mentally Retarded (MR)*
50-70	Mild Intellectual Impairment - (old term Mild Mental Retarded (MR)
71-84	Broaderline Intellectual Functioning
85-99	Lower average - normal
90-110	Average - normal
100-115	High average - normal
115-129	Bright
130-144	Gifted
145-159	Highly gifted
160 above	Profoundly gifted

Full Scale IQs between 90 and 110 are considered within the "average range" (Mean IQ score is 100).
Full Scale IQ graph
* = source "Children with Mental Retardation" A Parents' Guide", (1993, Pub.Woodbine House Inc., p6).

For a table of DSM-5 IQ Categories, the approximate percent distribution of cases, DSM-IV Criteria (based on Full Scale IQ scores, DSM-5 Criteria (severity classified on the basis of daily skills), AAIDD Criteria (severity classified on the basis of intensity of support needed) SSI Listings Criteria, from the book: "Mental Disorders and Disabilities Among Low-Income Children".

Classifications of Intellectual Disability Severity

(Thanks to Susan Shapiro, M.S., CCC-SLP, Special Education Advocate and Consultant of Speaking of Ability, Inc.)

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	This webpage was created Stepember 10, 2002 by Melody Orfei Webpage last modified on July 20, 2018 - V6, by MelodyOrfei
mel3sons@gmail.com