MCAT® ExamPsychological, Social, and Biological Foundations of BehaviorMedium
A patient reports experiencing vivid, dream-like hallucinations and delusions, along with disorganized speech and severely impaired social and occupational functioning. These symptoms have been present for six months and are not attributable to substance use or another medical condition. Which of the following diagnoses is most consistent with this presentation?
- AMajor Depressive Disorder with Psychotic Features
- BSchizophrenia
- CSchizoaffective Disorder
- DBipolar I Disorder
Show answer & explanationAnswer & explanation
Correct answer: B. Schizophrenia
The presence of positive symptoms (hallucinations, delusions, disorganized speech) and negative symptoms (impaired social/occupational functioning) lasting for at least six months, without a primary mood disturbance, strongly indicates schizophrenia.
Why the other options are wrong
- A. While major depressive disorder can have psychotic features, the primary presentation would be depression, and the psychosis would occur exclusively during depressive episodes. The question describes persistent symptoms not tied to a mood episode.
- C. Schizoaffective disorder involves a concurrent presentation of a mood episode (major depressive or manic) and Criterion A symptoms of schizophrenia, where delusions or hallucinations are present for at least two weeks in the absence of a major mood episode. The description here primarily emphasizes psychotic symptoms over mood.
- D. Bipolar I disorder involves manic episodes and often depressive episodes, but psychosis is secondary to mood disturbance and not the primary, sustained feature described.
Schizophrenia Diagnostic Criteria (DSM-5)
A chronic mental disorder characterized by disturbances in thought, perception, emotion, and behavior, requiring the presence of specific symptoms for a significant portion of time over a six-month period.
- Requires at least two active-phase symptoms for at least one month.
- One symptom must be delusions, hallucinations, or disorganized speech.
- Significant impairment in social/occupational functioning.
- Duration of disturbance is at least six months.
Memory trick: Schizo-Spectra: See Crazy, Hear Voices, Feel Disconnected.