Which of the following belongs to projected aids?

Appeared in: DSSSB Public Health Nurse - 2015

Explanation

An Epidiascope is a type of opaque projector, which is a projected visual aid.
It works by using a bright lamp and lenses to project the image of an opaque object (like a book page or a drawing) or a transparent slide onto a screen.
The requirement of a projection device and a separate screen is the defining characteristic of a projected aid.

Option A: A blackboard is a non-projected graphic aid. Information is written or drawn directly on its surface for viewing without any projection equipment.
Option B: A diorama is a non-projected, three-dimensional aid. It is a model or scene that provides a realistic representation but is viewed directly, not projected.
Option D: A globe is a non-projected, three-dimensional aid. It is a spherical model of the Earth and is used for direct observation and study, not projection.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Classification of Audio-Visual (AV) Aids as background academic context rather than a clinical decision trigger.
In nursing education and patient teaching, choosing the right AV aid is crucial for effective communication. Projected aids like LCD projectors are ideal for large group lectures on topics like disease prevention or treatment protocols.
Non-projected aids like anatomical models (a 3D aid) are excellent for small group or individual patient counseling, for instance, explaining a surgical procedure using a model of the heart.
A community health nurse might use non-projected aids like flashcards and flipcharts for health talks in rural areas where electricity for projected aids may be unavailable.

How to Approach the Question

First, understand the core concept of the question, which is to differentiate between 'projected' and 'non-projected' aids.
Recall the definition: A projected aid requires a machine (projector) to display an image on a screen. A non-projected aid is viewed directly without any intervening device.
Evaluate each option against this definition.
Blackboard: Viewed directly. It is a non-projected aid.
Diorama (3D model): Viewed directly. It is a non-projected aid.
Epidiascope: A type of projector that casts an image on a screen. It is a projected aid.

Concept Tested & Keywords

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E6 Nursing Education & Educational TechnologySuresh k Sharma (pp 21-557 of 572) pp. 291-293, 319-321

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