My brother was tested in 1993 and assigned an IQ of 18.  Not to worry, his true Adaptive Behavior composite Score is in the range of 12-28.  I am so relieved. If this was 1921 and we consulted the American Association of Mental Retardation (AAMR), Mike would have been promoted from Idiot (IQ 0-25) to Imbecile (IQ 26-50), with his higher adaptive scores.  Whew! At least the Diagnostic and Statistical Manual of Mental Disorders, fourth edition (DSM IV (TR)) categorized him as severely to profoundly retarded; marginally better language, but not as good as DSM 5, which replaces retardation with intellectually disabled.
My older brother Michael autistic and has never spoken. His attention span is nil, and he doesn’t seem to recognize other people as independent entities. How in the world can anyone measure his quotient of intelligence, if indeed that has any meaning…
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