Unit 2.1b: Perception: Perceptual Organizationn and Interpretation

Gestalt Psychology: Focus on organizing sensory inputs into coherent wholes (gestalts). The whole is perceived as greater than the sum of its parts.
Figure-Ground Perception: Ability to perceive objects (figures) distinct from their background (ground). Helps in organizing stimuli.
Grouping Principles: Organizing stimuli based on relations such as proximity, similarity, continuity, and closure.

Binocular Cues: Depth perception involving both eyes. Key methods include:
- Convergence: Eyes turn inward for nearby objects;
- Retinal Disparity: Slightly different images on retinas provide depth information.
Monocular Cues: Depth cues available through one eye only, including:
- Relative Clarity: Distant objects appear hazy;
- Relative Size: Smaller images are perceived as farther away;
- Interposition: Overlapping objects indicate depth.

Movement Assumptions: Perception based on object size; smaller objects at a distance appear slower.
Illusions of Motion: Include:
- Stroboscopic Movement: Rapid sequences of images appear as smooth motion;
- Autokinetic Effect: A stationary light appears to move in darkness.

Definitions: Recognizing objects as stable despite changes in sensory input.
- Color Constancy: Perceived color remains consistent under varying lighting;
- Shape Constancy: Recognizing shapes as constant despite changes in perspective;
- Size Constancy: Understanding that object size remains constant despite distance changes.

Impact of Experience: Sensory restrictions and restoration can affect perceptual abilities. Early exposure shapes perception development (critical periods).
Perceptual Adaptation: Adjusting to altered visual inputs (e.g., new glasses) showcases the flexibility of the perceptual system.