A study based on over 9,000 U.S. residents found that the most prevalent psychological disorder was ________.

• A. Major depressive disorder
• B. Obsessive-compulsive disorder
• C. Schizophrenia
• D. Specific phobia

Answer: (D)

Verified step by step guidance

1. Step 1: Understand the question is asking about the most prevalent psychological disorder found in a large study of over 9,000 U.S. residents.
2. Step 2: Recognize that prevalence refers to how common or widespread a disorder is within a population at a given time.
3. Step 3: Review common psychological disorders and their typical prevalence rates, such as Major depressive disorder, Obsessive-compulsive disorder, Schizophrenia, and Specific phobia.
4. Step 4: Recall that Specific phobia is known to be one of the most common anxiety disorders, often more prevalent than depression or schizophrenia in general population studies.
5. Step 5: Conclude that based on epidemiological data, Specific phobia is the most prevalent psychological disorder among the options provided.