Truth
The most commonly used definition specifies that an individual must meet two criteria in order to be considered intellectually disabled: (1) low intellectual functioning and (2) low adaptive skills. The evaluation and classification intellectual disability is a complex issue. There are three major criteria for intellectual disability: significant limitations in intellectual functioning, significant limitations in adaptive behavior, and onset before the age of 18. This differs from the IQ test because the IQ test is a major tool in measuring intellectual functioning, which is the mental capacity for learning, reasoning, problem solving, and so on. A test score below or around 70—or as high as 75—indicates a limitation in intellectual functioning.
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