A false perception that occurs in the absence of an actual sensory stimulus is known as

Appeared in: Haryana CHO - 2022

Explanation

A hallucination is defined as a perception that occurs without any corresponding external sensory stimulus.
This experience feels real to the person but is not based on reality.
It can affect any of the five senses, with auditory hallucinations being the most common in psychiatric disorders like schizophrenia.
The key differentiator is the complete lack of an external trigger for the sensory experience.

Why Other Options Were Wrong

Option B: A delusion is a disorder of thought content, not perception. It is a false, fixed belief that remains firm even with contradictory evidence.
Option C: Confabulation is a memory disturbance where a person unconsciously creates false memories to fill in gaps in their memory, without the intent to deceive.
Option D: An illusion is a misinterpretation of a real sensory stimulus. Unlike a hallucination, an illusion has an actual external object or stimulus that is being misperceived.

Related Visual

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Disorders of Perception and Thought as background academic context rather than a clinical decision trigger.
Accurately differentiating between hallucinations, illusions, and delusions is crucial for a nurse to make a correct diagnosis and plan appropriate care. For example, hallucinations are a hallmark of psychosis, while illusions are common in delirium.
A nurse's primary role is to ensure the safety of a patient experiencing perceptual disturbances, as they may react to their false perceptions in ways that could harm themselves or others.
What if? If the patient stated, "The shadows in the corner of the room look like monsters at night," the correct term would be illusion. This is because there is a real stimulus (shadows) that is being misinterpreted, unlike a hallucination where there is no stimulus.

How to Approach the Question

First, analyze the question stem to identify the key defining phrases: "false perception" and "absence of an actual sensory stimulus."
Next, recall the definitions of the four terms provided in the options, focusing on the core difference between them (perception vs. thought vs. memory, and presence vs. absence of a stimulus).
Compare the definition in the question to the definitions of the options. A hallucination is a perception without a stimulus.
An illusion is a misperception of a real stimulus.
A delusion is a false belief (thought), not a perception.
Confabulation is a false memory.

Concept Tested & Keywords

Concept Tested: Disorders of Perception and Thought
Stem keywords: false perception, absence of sensory stimulus
Lead-in keywords: is known as
Negative lead-in flag: false

Question ID

QjfTSSMdpCdyGYSH-5aoKC

Reference Book

E6 Robert Boland, Marcia L. Verduin - Kaplan and Sadock's Comprehensive Text of Psychiatry-Wolters Kluwer Health (2024) (pp 1-16525 of 16525) pp. 3815-3817, 3251-3253, 3250-3252

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