Which term describes illogical and incomprehensible speech?

Which term describes illogical and incomprehensible speech?

• A. Incoherence
• B. Blocking
• C. Perseveration
• D. Echolalia

Answer: (A)

Incoherence describes disorganized thought and speech in which ideas do not connect and the words are jumbled or nonsensical, making the message hard or impossible to understand. In a mental status exam, you’d see speech that cannot be followed because of abrupt derailment, illogical associations, or nonsensical phrases. For example, a patient might say something like, “The green idea swallows the thunder, because the clock tastes blue,” which lacks a logical connection between elements. This is different from blocking, where the flow of speech stops abruptly; perseveration, where a single idea or word is repetitively repeated; and echolalia, where a person just repeats someone else’s words. Incoherence signals a breakdown in the form of thought often seen in acute psychosis, delirium, or severe mood disorders, reflecting a disruption in how thoughts are organized into language.

Incoherence describes disorganized thought and speech in which ideas do not connect and the words are jumbled or nonsensical, making the message hard or impossible to understand. In a mental status exam, you’d see speech that cannot be followed because of abrupt derailment, illogical associations, or nonsensical phrases. For example, a patient might say something like, “The green idea swallows the thunder, because the clock tastes blue,” which lacks a logical connection between elements. This is different from blocking, where the flow of speech stops abruptly; perseveration, where a single idea or word is repetitively repeated; and echolalia, where a person just repeats someone else’s words. Incoherence signals a breakdown in the form of thought often seen in acute psychosis, delirium, or severe mood disorders, reflecting a disruption in how thoughts are organized into language.