Intellectual Developmental Disorder is defined by onset before 18 and impairments in which areas?

Intellectual Developmental Disorder is defined by onset before 18 and impairments in which areas?

• A. Onset prior to 18 with impairments in verbal skills only
• B. Onset after 18 with impairments in adaptive skills
• C. Onset prior to 18 with impairments in social skills only
• D. Onset prior to 18 with impairments in intellectual performance and adaptive skills

Answer: (D)

Intellectual Developmental Disorder involves deficits in both intellectual functioning and adaptive functioning that begin during the developmental period (before age 18). This means the person has noticeable limitations in reasoning, learning, problem-solving (intellectual performance) as well as in everyday skills needed to live independently and participate in society (adaptive skills). Adaptive functioning covers practical skills like self-care, managing money and schedules, communication, and social participation, across conceptual, social, and practical domains. Because the definition requires impairments in both intellectual abilities and adaptive functioning with onset before 18, the option that mentions impairments in intellectual performance and adaptive skills and onset prior to 18 is the correct choice. The other options fail because they limit impairment to a single domain or specify an incorrect age of onset.

Intellectual Developmental Disorder involves deficits in both intellectual functioning and adaptive functioning that begin during the developmental period (before age 18). This means the person has noticeable limitations in reasoning, learning, problem-solving (intellectual performance) as well as in everyday skills needed to live independently and participate in society (adaptive skills). Adaptive functioning covers practical skills like self-care, managing money and schedules, communication, and social participation, across conceptual, social, and practical domains.

Because the definition requires impairments in both intellectual abilities and adaptive functioning with onset before 18, the option that mentions impairments in intellectual performance and adaptive skills and onset prior to 18 is the correct choice. The other options fail because they limit impairment to a single domain or specify an incorrect age of onset.