Read each of the following statements-Assertion (A) and Reason (R); and indicate your answer using codes given below:
Assertion (A): Perception remains constant although the proximal sensation changes.
Reason (R): Our perceptual system has mechanisms that adjust our perception of the proximal stimulus.
Codes:

Correct option is A

Both statements are true and R correctly explains A. This describes the phenomenon of perceptual constancy - our perception of objects remains stable despite changes in the proximal stimulus (the actual sensory input reaching our receptors). For example, we perceive a door as rectangular even when viewing it from an angle that creates a trapezoidal image on the retina. The Reason correctly explains that our perceptual system has built-in mechanisms (like size constancy, shape constancy, color constancy) that compensate for variations in the proximal stimulus to maintain stable perception of distal objects.

Information Booster:
1. Perceptual Constancy: The ability to perceive objects as unchanging despite variations in sensory input (distance, angle, illumination)
2. Types: Include size constancy, shape constancy, color constancy, and brightness constancy
3. Proximal vs. Distal: Proximal stimulus is the sensory pattern at receptors; distal stimulus is the actual object in the environment
4. Adaptive Function: Constancy mechanisms allow us to recognize objects across varying viewing conditions, essential for navigating the world
5. Neural Mechanisms: Involve both bottom-up sensory processing and top-down cognitive influences using context and prior knowledge