Quote of the Day

“Cut-off scores of any sort are a violation of what we have known for years about errors of measurement. The only situations where cut-off scores make any sense are for the diagnosis of intellectual disability (which used to be known as mental retardation). That diagnostic category is defined specifically by low intellectual functioning. However, even in such diagnostic circumstances, errors of measurement must be taken into account, and an IQ cut=off is not sufficient for the diagnosis–the person must also be shown to have very low adaptive behavior (akin to social intelligence).” — Scott Barry Kaufman 



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