Perception - Personal Pages - Denison University

Perception Perception Definition Perception The organization, identification, and interpretation of sensory information to understand the environment.

http://en.wikipedia.org/wiki/Perception Gestalt Psychology Max Wertheimer: 1880 1943 Kurt Koffka: 1886 1941

Wolfgang Khler: 1887 1967 Gestalt Psychology Gestalt Psychology The whole is different than the sum of the parts. Gestalt Laws of Perceptual Grouping include

similarity, proximity, good continuation. http://commons.wikimedia.org/wiki/File:Gestalt_proximity.svg http://commons.wikimedia.org/wiki/File:Gestalt_similarity.svg http://commons.wikimedia.org/wiki/File:CrossKeys.png

http://en.wikipedia.org/wiki/File:Gestalt_Principles_Composition.jpg Figure Ground / Reversible Figures http://en.wikipedia.org/wiki/File:Gestalt_Principles_Composition.jpg

Illusory Figures Perceptual Constancy Perceptual Constancy The perception of an object or quality as unchanging despite

changes in the proximal stimulus. http:// en.wikipedia.org/wiki/File:Shape_constancy.gif https://commons.wikimedia.org/wiki/File:Hot_air_balloon__color_constancy.jpg

Perceptual Constancy Top-Down vs Bottom-Up Top-Down Process Knowledge Driven

Requires information beyond the stimulus Bottom-Up Stimulus Driven Relies entirely on the neural response to stimulation

Top-Down vs Bottom-Up Top-Down vs Bottom-Up https://commons.wikimedia.org/wiki/File:Basketball.png https://commons.wikimedia.org/wiki/File:Tennis_ball_01.jpg

Visual Neuroscience: What / Where Dorsal Pathway Where

Ventral Pathway What http://en.wikipedia.org/wiki/File:Ventral-dorsal_streams.svg The Binding Problem

The Binding Problem - How is neural activity from different brain regions combined to give a coherent perceptual experience? http://en.wikipedia.org/wiki/File:SimulationNeuralOscillations.png

The Binding Problem: Neural Synchrony http://en.wikipedia.org/wiki/File:Hermann_von_Helmholtz.jpg Unconscious Inference Unconscious Inference The phenomenon

that occurs when ones statistical knowledge of the environment alters the perception of proximal stimulation, without effort on the part of the perceiver. http://en.wikipedia.org/wiki/File:Grey_square_optical_illusion.PNG

http://en.wikipedia.org/wiki/File:Ponzo_illusion.gif Unconscious Inference From Wiki The second card from the left seems to be a stronger shade of pink in the top picture. In fact they are the same color,

but the brain changes its assumption about color due to the color cast of the surrounding photo. http://en.wikipedia.org/wiki/Color-constancy http://en.wikipedia.org/wiki/File:ColourIllusion2.jpg