CDDN – CERTIFIED DEVELOPMENTAL
DISABILITIES NURSE EXAM |250 Multiple Choice
Questions with Answers & Rationales | latest update |
instant download
1. A nurse is assessing a 30-year-old client with Down syndrome who has recently
developed new-onset behavioral changes including increased agitation and social
withdrawal. Which assessment should be prioritized FIRST?
A) Psychiatric evaluation for onset of schizophrenia
B) Comprehensive medical workup including thyroid function, hearing, and pain assessment
C) Behavioral support plan revision with the interdisciplinary team
D) Referral to a psychiatrist for antipsychotic medication initiation
B) Comprehensive medical workup including thyroid function, hearing, and pain
assessment (correct answer)
Rationale: In individuals with Down syndrome, behavioral changes are frequently the first
manifestation of underlying medical conditions such as hypothyroidism, hearing loss,
atlantoaxial instability, or pain. Medical causes must be ruled out before attributing changes to
psychiatric or behavioral etiology — a core principle of IDD nursing practice.
2. Which of the following BEST describes the difference between "habilitation" and
"rehabilitation" in the context of developmental disabilities nursing?
A) Rehabilitation focuses on skill acquisition; habilitation focuses on skill restoration
B) Habilitation develops skills never previously acquired; rehabilitation restores previously held
skills lost to illness or injury
C) Both terms are interchangeable in developmental disabilities care
D) Rehabilitation applies only to physical disabilities; habilitation applies only to intellectual
disabilities
B) Habilitation develops skills never previously acquired; rehabilitation restores previously
held skills lost to illness or injury (correct answer)
,Rationale: In IDD nursing, habilitation is the process of teaching new skills and abilities that
were never fully developed, while rehabilitation restores function lost due to injury or illness.
This distinction is fundamental to understanding the goals of developmental disabilities nursing
practice.
3. A client with Prader-Willi syndrome is found attempting to access the locked kitchen at 2
AM. The nurse's MOST appropriate immediate intervention is:
A) Administer a PRN sedative to redirect the client back to sleep
B) Gently redirect the client, ensure kitchen security is intact, and document the event for
behavior plan review
C) Allow the client supervised access to a small snack to reduce obsessive behavior
D) Notify the psychiatrist for medication adjustment
B) Gently redirect the client, ensure kitchen security is intact, and document the event for
behavior plan review (correct answer)
Rationale: Prader-Willi syndrome involves hyperphagia driven by hypothalamic dysfunction.
Environmental controls (locked food storage) combined with gentle behavioral redirection are
first-line interventions. Documentation supports behavior plan review. Unsupervised food
access or immediate medication changes are not appropriate initial responses.
4. When performing a health assessment on a non-verbal adult with severe intellectual
disability, the nurse notes the client grimacing when the left lower quadrant is palpated.
Which action demonstrates the HIGHEST standard of nursing care?
A) Document the finding and monitor for 24 hours before escalating
B) Administer PRN pain medication and reassess in 2 hours
C) Conduct a comprehensive pain assessment using an observational tool, escalate to the
physician, and document all findings
D) Ask the caregiver if the client has complained of stomach pain
C) Conduct a comprehensive pain assessment using an observational tool, escalate to the
physician, and document all findings (correct answer)
,Rationale: For non-verbal individuals with IDD, observational pain assessment tools (PAINAD,
NCCPC) are essential for accurate pain quantification. Immediate escalation to the physician
with comprehensive documentation ensures timely medical evaluation of a potentially serious
abdominal finding.
5. The nurse is reviewing a client's Individual Support Plan (ISP) and notes that the client's
stated goal is to obtain competitive employment. Which nursing action BEST supports self-
determination?
A) Advise the client that employment may not be realistic given their disability level
B) Contact the guardian to verify whether this goal is appropriate
C) Collaborate with the client, vocational rehabilitation, and the IDT to identify employment
support strategies aligned with the client's goal
D) Add an employment-related skill to the ISP without consulting the client
C) Collaborate with the client, vocational rehabilitation, and the IDT to identify
employment support strategies aligned with the client's goal (correct answer)
Rationale: Self-determination is a foundational principle of IDD care. The nurse's role is to
support — not redirect — the client's own goals. Collaborating with the client and appropriate
resources while respecting their vision is the highest expression of person-centered nursing
practice.
6. A client with Fragile X syndrome exhibits significant social anxiety during group
activities. The nurse observes the client becoming increasingly agitated, making repetitive
hand movements, and avoiding eye contact. The MOST appropriate environmental
modification is:
A) Require the client to participate in all group activities to reduce avoidance
B) Provide a sensory break area with reduced stimulation and allow the client to self-regulate
before returning to activities
C) Administer an anxiolytic medication before all group activities
D) Remove the client from all group programming to prevent distress
B) Provide a sensory break area with reduced stimulation and allow the client to self-
regulate before returning to activities (correct answer)
, Rationale: Fragile X syndrome commonly involves sensory processing difficulties and social
anxiety. Providing a designated low-stimulation break area supports sensory regulation. This
approach respects the client's needs while maintaining participation opportunities — a principle
of positive behavioral support.
7. Which of the following represents the MOST accurate clinical presentation of Angelman
syndrome that distinguishes it from other neurodevelopmental conditions?
A) Progressive loss of hand use between 6–18 months with breathing irregularities
B) Happy, sociable affect with minimal or absent speech, epilepsy, and jerky movements
C) Hyperphagia, short stature, and hypothalamic dysfunction
D) Distinctive facial features, growth retardation, and self-biting behavior
B) Happy, sociable affect with minimal or absent speech, epilepsy, and jerky movements
(correct answer)
Rationale: Angelman syndrome's clinical hallmarks include a characteristically happy and
sociable demeanor, severe speech impairment, epilepsy (often myoclonic or atonic), and
movement abnormalities. This contrasts with Rett syndrome (progressive regression), Prader-
Willi (hyperphagia), and Cornelia de Lange (self-injury).
8. A nurse working in a group home discovers that a client with moderate intellectual
disability has unexplained bruising in various stages of healing on their upper arms and
torso. The client becomes visibly distressed when a particular staff member enters the
room. The nurse's PRIORITY action is:
A) Document the bruising and complete a full assessment before taking further action B)
Immediately separate the client from the suspected staff member, ensure the client's safety, and
report to adult protective services and the supervisor C) Interview the staff member privately
about the bruising before making a report D) Ask the client to describe how they obtained the
bruises
B) Immediately separate the client from the suspected staff member, ensure the client's
safety, and report to adult protective services and the supervisor (correct answer)
Rationale: Multiple bruises in various healing stages combined with behavioral indicators of
fear around a specific caregiver constitute strong evidence of abuse. The nurse's priority is
client safety, followed by mandatory reporting to APS. Evidence preservation requires not
confronting the suspected abuser before reporting.
DISABILITIES NURSE EXAM |250 Multiple Choice
Questions with Answers & Rationales | latest update |
instant download
1. A nurse is assessing a 30-year-old client with Down syndrome who has recently
developed new-onset behavioral changes including increased agitation and social
withdrawal. Which assessment should be prioritized FIRST?
A) Psychiatric evaluation for onset of schizophrenia
B) Comprehensive medical workup including thyroid function, hearing, and pain assessment
C) Behavioral support plan revision with the interdisciplinary team
D) Referral to a psychiatrist for antipsychotic medication initiation
B) Comprehensive medical workup including thyroid function, hearing, and pain
assessment (correct answer)
Rationale: In individuals with Down syndrome, behavioral changes are frequently the first
manifestation of underlying medical conditions such as hypothyroidism, hearing loss,
atlantoaxial instability, or pain. Medical causes must be ruled out before attributing changes to
psychiatric or behavioral etiology — a core principle of IDD nursing practice.
2. Which of the following BEST describes the difference between "habilitation" and
"rehabilitation" in the context of developmental disabilities nursing?
A) Rehabilitation focuses on skill acquisition; habilitation focuses on skill restoration
B) Habilitation develops skills never previously acquired; rehabilitation restores previously held
skills lost to illness or injury
C) Both terms are interchangeable in developmental disabilities care
D) Rehabilitation applies only to physical disabilities; habilitation applies only to intellectual
disabilities
B) Habilitation develops skills never previously acquired; rehabilitation restores previously
held skills lost to illness or injury (correct answer)
,Rationale: In IDD nursing, habilitation is the process of teaching new skills and abilities that
were never fully developed, while rehabilitation restores function lost due to injury or illness.
This distinction is fundamental to understanding the goals of developmental disabilities nursing
practice.
3. A client with Prader-Willi syndrome is found attempting to access the locked kitchen at 2
AM. The nurse's MOST appropriate immediate intervention is:
A) Administer a PRN sedative to redirect the client back to sleep
B) Gently redirect the client, ensure kitchen security is intact, and document the event for
behavior plan review
C) Allow the client supervised access to a small snack to reduce obsessive behavior
D) Notify the psychiatrist for medication adjustment
B) Gently redirect the client, ensure kitchen security is intact, and document the event for
behavior plan review (correct answer)
Rationale: Prader-Willi syndrome involves hyperphagia driven by hypothalamic dysfunction.
Environmental controls (locked food storage) combined with gentle behavioral redirection are
first-line interventions. Documentation supports behavior plan review. Unsupervised food
access or immediate medication changes are not appropriate initial responses.
4. When performing a health assessment on a non-verbal adult with severe intellectual
disability, the nurse notes the client grimacing when the left lower quadrant is palpated.
Which action demonstrates the HIGHEST standard of nursing care?
A) Document the finding and monitor for 24 hours before escalating
B) Administer PRN pain medication and reassess in 2 hours
C) Conduct a comprehensive pain assessment using an observational tool, escalate to the
physician, and document all findings
D) Ask the caregiver if the client has complained of stomach pain
C) Conduct a comprehensive pain assessment using an observational tool, escalate to the
physician, and document all findings (correct answer)
,Rationale: For non-verbal individuals with IDD, observational pain assessment tools (PAINAD,
NCCPC) are essential for accurate pain quantification. Immediate escalation to the physician
with comprehensive documentation ensures timely medical evaluation of a potentially serious
abdominal finding.
5. The nurse is reviewing a client's Individual Support Plan (ISP) and notes that the client's
stated goal is to obtain competitive employment. Which nursing action BEST supports self-
determination?
A) Advise the client that employment may not be realistic given their disability level
B) Contact the guardian to verify whether this goal is appropriate
C) Collaborate with the client, vocational rehabilitation, and the IDT to identify employment
support strategies aligned with the client's goal
D) Add an employment-related skill to the ISP without consulting the client
C) Collaborate with the client, vocational rehabilitation, and the IDT to identify
employment support strategies aligned with the client's goal (correct answer)
Rationale: Self-determination is a foundational principle of IDD care. The nurse's role is to
support — not redirect — the client's own goals. Collaborating with the client and appropriate
resources while respecting their vision is the highest expression of person-centered nursing
practice.
6. A client with Fragile X syndrome exhibits significant social anxiety during group
activities. The nurse observes the client becoming increasingly agitated, making repetitive
hand movements, and avoiding eye contact. The MOST appropriate environmental
modification is:
A) Require the client to participate in all group activities to reduce avoidance
B) Provide a sensory break area with reduced stimulation and allow the client to self-regulate
before returning to activities
C) Administer an anxiolytic medication before all group activities
D) Remove the client from all group programming to prevent distress
B) Provide a sensory break area with reduced stimulation and allow the client to self-
regulate before returning to activities (correct answer)
, Rationale: Fragile X syndrome commonly involves sensory processing difficulties and social
anxiety. Providing a designated low-stimulation break area supports sensory regulation. This
approach respects the client's needs while maintaining participation opportunities — a principle
of positive behavioral support.
7. Which of the following represents the MOST accurate clinical presentation of Angelman
syndrome that distinguishes it from other neurodevelopmental conditions?
A) Progressive loss of hand use between 6–18 months with breathing irregularities
B) Happy, sociable affect with minimal or absent speech, epilepsy, and jerky movements
C) Hyperphagia, short stature, and hypothalamic dysfunction
D) Distinctive facial features, growth retardation, and self-biting behavior
B) Happy, sociable affect with minimal or absent speech, epilepsy, and jerky movements
(correct answer)
Rationale: Angelman syndrome's clinical hallmarks include a characteristically happy and
sociable demeanor, severe speech impairment, epilepsy (often myoclonic or atonic), and
movement abnormalities. This contrasts with Rett syndrome (progressive regression), Prader-
Willi (hyperphagia), and Cornelia de Lange (self-injury).
8. A nurse working in a group home discovers that a client with moderate intellectual
disability has unexplained bruising in various stages of healing on their upper arms and
torso. The client becomes visibly distressed when a particular staff member enters the
room. The nurse's PRIORITY action is:
A) Document the bruising and complete a full assessment before taking further action B)
Immediately separate the client from the suspected staff member, ensure the client's safety, and
report to adult protective services and the supervisor C) Interview the staff member privately
about the bruising before making a report D) Ask the client to describe how they obtained the
bruises
B) Immediately separate the client from the suspected staff member, ensure the client's
safety, and report to adult protective services and the supervisor (correct answer)
Rationale: Multiple bruises in various healing stages combined with behavioral indicators of
fear around a specific caregiver constitute strong evidence of abuse. The nurse's priority is
client safety, followed by mandatory reporting to APS. Evidence preservation requires not
confronting the suspected abuser before reporting.
