RUHS, Jaipur, M.Sc Nursing Entrance Exam-2023
Mental Health Nursing
Easy
A rope in a dark room is perceived as a snake. This is an example of :
Appeared in: RUHS, Jaipur, M.Sc Nursing Entrance Exam-2023
Explanation
- An illusion is defined as a misinterpretation or a false perception of a real external stimulus.
- In the given scenario, the rope is the real, physical stimulus that is present in the environment.
- The darkness acts as a condition that facilitates the misinterpretation, causing the brain to perceive the rope incorrectly as a snake.
Why Other Options Were Wrong
- Option A: A perceptual set is a mental predisposition or readiness to perceive a stimulus in a particular way. It is a contributing factor to the illusion, not the illusion itself.
- Option B: A hallucination is a false sensory perception that occurs in the complete absence of any external stimulus.
- Option D: Retinal disparity is a binocular cue for depth perception. It relates to how the brain processes the different images from two eyes to create a 3D view, and has no role in identifying or misidentifying an object.
Related Visual
Clinical Relevance
- Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Perceptual Disorders: Illusion vs. Hallucination as background academic context rather than a clinical decision trigger.
- In nursing, accurately differentiating between illusions and hallucinations is a critical component of the mental status examination.
- Illusions are common in patients experiencing delirium, high fever, or sensory deprivation. They can often be managed with nursing interventions like improving lighting, reducing clutter, and reorienting the patient.
- Hallucinations are more characteristic of psychosis (e.g., schizophrenia), severe depression, or substance withdrawal, and typically require more complex psychiatric and pharmacological interventions.
How to Approach the Question
- First, analyze the core components of the scenario presented in the question. Identify that there is a real object ('a rope') and a misinterpretation of that object ('perceived as a snake').
- Next, recall the precise definitions of the key psychological terms provided in the options: Illusion, Hallucination, and Perceptual Set.
- An 'illusion' is a misinterpretation of a real stimulus.
- A 'hallucination' is a perception without a real stimulus.
- Apply these definitions to the scenario. The presence of the rope (a real stimulus) that is misinterpreted directly matches the definition of an illusion.
- Eliminate the other options based on their definitions. A hallucination is incorrect because a stimulus is present. A perceptual set is the predisposition, not the event itself. Retinal disparity is irrelevant as it deals with depth perception.
Concept Tested & Keywords
- Concept Tested: Perceptual Disorders: Illusion vs. Hallucination
- Stem keywords: rope, perceived as a snake, dark room
- Lead-in keywords: example of
Question ID
QDBW3wQKuau8aF8jvpR_3e
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, 3814-3816
Practise the full RUHS, Jaipur, M.Sc Nursing Entrance Exam-2023
Attempt every question from this paper in a timed mock, then review the full solution for each one.
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