Here have some pain-
Why the IQ Threshold Changed
1959 Threshold: The old threshold for mental retardation was set at an IQ of 85 or below. [1] (x.com)
1973 Change: The American Association on Intellectual and Developmental Disabilities (AAIDD) lowered the cutoff to an IQ of 70 or below. [1] (mn.gov), [2] (x.com)
Reason for Change: The previous threshold of 85 over-identified individuals"disproportionately labeling minority students"and caused misclassifications in special education. Dropping the score to 70 focused the diagnosis on people with true cognitive needs. [1] (x.com)
>conclusion
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