CDDN-Intellectual and Developmental
Disabilities Exam Fully Solved 2026
Updated.
What is an intellectual disability? - Answer "Characterized by significant limitations in both
intellectual functioning and in adaptive
behavior, which covers many everyday social
and practical skills. This disability originates
before the age of
18."
How is it Assessed? - Answer -Intellectual functioning- generally based on an IQ test (tests
reasoning, learning, problem solving, etc.).
-Adaptive behavior
-Assessment must include consideration of personal and environmental factors that may impact
the way people communicate, move, behave.
Adaptive behavior - Answer -Conceptual skills- e.g., language/literacy, dealing with money,
concepts of time, and self-direction
-Social skills- e.g., interpersonal skills, patterns of interacting with others, gullibility, social
problem solving, and ability to follow rules/obey laws and to avoid being victimized.
-Practical skills- ADLs, occupational skills, healthcare, travel/transportation, schedules/routines,
safety, use of money, using telephone, etc.
Relationship btw ID and DD - Answer -Developmental disabilities are severe chronic
disabilities that can be physical, cognitive, or both- and must appear before the age of 22 and be
considered to be "lifelong."
-Intellectual disabilities fall under this umbrella- and encompass cognitive disabilities.
Mild Intellectual disability - Answer -( IQ 50-55 to 70 + adaptive behavior )
, -Develop social and communication skills in preschool years
-May not be distinguishable from children without ID until a later age
-Acquire academic skills up to about 6th grade level
-May need social and financial assistance as adults
-Able to maintain at least unskilled employment
-Incidence: 85% of all individuals characterized as having an intellectual disability are in this
category
Moderate Intellectual Disability - Answer -(IQ 35-40 to 50-55 + adaptive behavior)
-Communication skills are acquired in later childhood years
-Academic progress unlikely beyond 2nd grade level
-Difficulty grasping social conventions and may have trouble with relationships
-Need supervision
-Incidence: 10% of those with ID
Severe Intellectual Disability - Answer -Little or no communicative speech
-Functions on elementary level in both speech and self care
-Physical abnormalities can be present
-Need constant assistance
-Incidence: 3-4% of those with ID
Disabilities Exam Fully Solved 2026
Updated.
What is an intellectual disability? - Answer "Characterized by significant limitations in both
intellectual functioning and in adaptive
behavior, which covers many everyday social
and practical skills. This disability originates
before the age of
18."
How is it Assessed? - Answer -Intellectual functioning- generally based on an IQ test (tests
reasoning, learning, problem solving, etc.).
-Adaptive behavior
-Assessment must include consideration of personal and environmental factors that may impact
the way people communicate, move, behave.
Adaptive behavior - Answer -Conceptual skills- e.g., language/literacy, dealing with money,
concepts of time, and self-direction
-Social skills- e.g., interpersonal skills, patterns of interacting with others, gullibility, social
problem solving, and ability to follow rules/obey laws and to avoid being victimized.
-Practical skills- ADLs, occupational skills, healthcare, travel/transportation, schedules/routines,
safety, use of money, using telephone, etc.
Relationship btw ID and DD - Answer -Developmental disabilities are severe chronic
disabilities that can be physical, cognitive, or both- and must appear before the age of 22 and be
considered to be "lifelong."
-Intellectual disabilities fall under this umbrella- and encompass cognitive disabilities.
Mild Intellectual disability - Answer -( IQ 50-55 to 70 + adaptive behavior )
, -Develop social and communication skills in preschool years
-May not be distinguishable from children without ID until a later age
-Acquire academic skills up to about 6th grade level
-May need social and financial assistance as adults
-Able to maintain at least unskilled employment
-Incidence: 85% of all individuals characterized as having an intellectual disability are in this
category
Moderate Intellectual Disability - Answer -(IQ 35-40 to 50-55 + adaptive behavior)
-Communication skills are acquired in later childhood years
-Academic progress unlikely beyond 2nd grade level
-Difficulty grasping social conventions and may have trouble with relationships
-Need supervision
-Incidence: 10% of those with ID
Severe Intellectual Disability - Answer -Little or no communicative speech
-Functions on elementary level in both speech and self care
-Physical abnormalities can be present
-Need constant assistance
-Incidence: 3-4% of those with ID
