CMN 552 Unit 3 PTSD OBSESSIVE-COMPULSIVE DISORDER (OCD) – EXAM REVISION MATERIAL WITH QUESTIONS AND CORRECT ANSWERS GRADED A+ FOR 2026

CMN 552 Unit 3 PTSD OBSESSIVE-
COMPULSIVE DISORDER (OCD) –
EXAM REVISION MATERIAL WITH
QUESTIONS AND CORRECT
ANSWERS GRADED A+ FOR 2026
OBSESSIVE-COMPULSIVE DISORDER (OCD) – EXAM REVISION MATERIAL



1. What are the common symptoms represented in OCD?

CORRECT ANSWER:

• Intrusive thoughts

• Rituals

• Preoccupations

• Compulsions

Reference: Sadock, p. 418



2. Differentiate between an obsession and a compulsion.

CORRECT ANSWER:

Term Definition

Obsession A recurrent and intrusive thought, feeling, idea, or sensation.

A conscious, standardized, recurrent behavior such as counting, checking,
Compulsion
washing, or avoiding.

Exam Tip

Obsessions = Thoughts

Compulsions = Actions

, Reference: Sadock, p. 418



3. What is the prevalence of OCD?

CORRECT ANSWER:

• Lifetime prevalence is approximately 2–3% of the population.

• OCD affects males and females almost equally in adulthood.

Reference: Sadock, p. 418



4. What are the common comorbid psychiatric conditions in patients with OCD?

CORRECT ANSWER:

Mood & Anxiety Disorders Other Disorders

Major Depressive Disorder Eating Disorders

Social Phobia Personality Disorders

Generalized Anxiety Disorder Tourette's Disorder

Panic Disorder Tic Disorders

Specific Phobia Alcohol Use Disorder

High-Yield Point

Major Depressive Disorder is the most common comorbid condition associated with OCD.

Reference: Sadock, p. 418



5. What are the risk factors for the development of OCD?

CORRECT ANSWER:

• First-degree relatives have a 3–5 times higher risk of developing OCD.

• Boys are more commonly affected than girls during adolescence.

• Mean age of onset is approximately 20 years.