Cognition: Perception and Perceptual Organization

Comprehensive vocabulary flashcards covering key concepts of perception, attention, depth cues, and perceptual organization from AP Psychology.

Perception

The process by which the brain organizes and interprets sensory information, transforming it into meaningful objects and events.

Bottom-Up Processing

A way the brain makes sense of information by starting with small sensory details and building up to a complete perception without prior knowledge or expectations influencing the process ('Details to Big Picture').

Top-Down Processing

Interpreting sensory information based on the larger context, prior knowledge, and expectations, using overarching concepts to shape perception from general to specific ('Big Picture to Details').

Selective Attention

The process of focusing on a specific aspect of information while ignoring others, allowing prioritization of sensory stimuli relevant to current tasks.

Cocktail Party Effect

A specific example of selective attention in an auditory context, describing the ability to focus on a single conversation or detect a personally significant stimulus (such as one's name) in a noisy environment.

Inattentional Blindness

A phenomenon where an individual fails to notice an unexpected stimulus in their visual field because their attention is focused on something else.

Change Blindness

The failure to notice large changes in one's immediate environment when the alteration occurs simultaneously with a visual disruption.

Schemas

Mental frameworks formed from past experiences that help organize and interpret information in the world around us, shaping expectations and guiding attention.

Perceptual Set

A mental predisposition influenced by expectations, experiences, and context to perceive or notice certain aspects of sensory data while ignoring others.

Gestalt Psychology

A psychological approach emphasizing that the brain is wired to perceive unified whole objects or figures (gestalts) rather than merely a collection of parts ('the whole is different from the sum of its parts').

Depth Perception

The ability to perceive the world in three dimensions ($3\text{D}$) and judge the distance of objects.

Visual Cliff

A laboratory apparatus involving an apparent, but not actual drop from one surface to another, originally designed to test depth perception in infants and young animals.

Figure-Ground

The perceptual organization of the visual field into objects (figures) that stand out from their surroundings (ground).

Binocular Depth Cues

Visual cues that depend on the use of both eyes together to perceive depth and distance in three-dimensional space.

Stereopsis

The brain's process of combining two distinct, slightly disparate images from each eye to create a single perception of depth and distance.

Retinal Disparity

A binocular depth cue resulting from the slightly different visual angles and images cast on each retina due to the horizontal distance between the eyes.

Convergence

A binocular depth cue involving the inward turning of the eyes toward each other as an object moves closer, providing neuromuscular feedback about proximity.

Monocular Depth Cues

Visual indicators of distance and space that are available to and can be processed using just one eye.

Relative Clarity

A monocular depth cue where clearer, sharper, and more detailed objects are perceived as closer, while hazier, less distinct objects are perceived as farther away.

Relative Size

A monocular cue where, assuming two objects are similar in actual size, the one that casts a larger retinal image is perceived as closer, and the smaller as farther away.

Texture Gradient

A monocular cue for depth perception where distinct, coarse textures appear to become progressively denser, finer, and smoother as distance increases.

Linear Perspective

A monocular depth cue based on the appearance of parallel lines converging toward a vanishing point as they recede into the distance.

Interposition

A monocular cue occurring when one object partially blocks or obscures another from view, causing the overlapping object to be perceived as closer.

Perceptual Constancies

The ability of the brain to perceive objects as stable and unchanging in properties such as size, shape, and color, despite variations in retinal input.

Shape Constancy

The perception that an object maintains its familiar shape regardless of changes in angle, perspective, or the retinal image it casts.

Size Constancy

The perception that an object retains its physical size even as changes in distance cause the image on the retina to expand or contract.

Color Constancy

The ability to perceive the color of an object as remaining consistent across varying lighting and illumination conditions.

Apparent Movement

The visual illusion of continuous motion produced by the rapid presentation of a succession of static images, as seen in animations and film.