Multiple Choice Questions « Return to contents list Chapter 22, Question 69.69. Which of the following is false regarding the diagnosis of intellectual disability according to the DSM-IV-TR? a. The intelligence quotient (IQ) is generally less than 70 and is characterized by significant deficit in intellectual functioning. b. There must be a deficit in adaptive functioning. c. The disability must be identified prior to 12 years of age. d. IQ and adaptive functioning are generally evaluated using standardized tests or scales.