Which description illustrates disorganized speech as a symptom?

• A. Disorganized speech, such as tangentiality or derailment.
• B. Flat affect.
• C. Alogia.
• D. Hallucinations.

Answer: (A)

Disorganized speech signals disorganized thinking, a hallmark of schizophrenia's formal thought disorder. When someone speaks in a disorganized way, their thoughts aren’t connected in a logical flow. Tangentiality means they wander off topic and never return to the original point, while derailment (loosening of associations) causes abrupt shifts in topic with little or no logical link. These patterns are classic illustrations of speech that reflects impaired organization of thought, making them the best description of disorganized speech.

By contrast, flat affect refers to reduced emotional expressiveness, alogia to diminished speech output or content, and hallucinations to sensory experiences without external stimuli. These describe different symptom domains and don’t capture the disorganization of thought and language shown by tangentiality or derailment.