What is the major difference between the DSM-5 system of classification of levels of intellectual disability and the American Association on Intellectual and Developmental Disabilities (AAIDD) system?

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The major difference between the DSM-5 system and the AAIDD system is that the AAIDD system is based on the level of support required, whereas the DSM-5 system is based on IQ scores and severity of deficits in adaptive functioning. The AAIDD system focuses on the individual's ability to function independently in different environments, whereas the DSM-5 system primarily focuses on intellectual functioning and adaptive behaviors. This makes the AAIDD system more useful in identifying the level of support and services an individual with intellectual disability may require.

What Is the Major Difference Between the DSM-5 System of Classification