Images and Links
Psychology 351 - Psychology of Perception. Dr. Pomerantz, Rice University, Fall 2007
Please alert me to any dead or dysfunctional links here!
Note: Some of these figures are from another textbook,
Goldstein's Sensation & Perception (1999)
Some are from Wolfe et al., Sensation
& Perception (2006)
Jump to sections below:
Introduction
Psychophysics
Light and Vision
Color Vision
Perceptual Organization
Motion
Depth
Auditory Perception
Speech Perception
Attention
Touch
Good Links to Perception websites
Michael Bach's illusion site (my personal favorite)
Akiyoshi Kitaoka's illusion site (my other personal favorite)
Illusionworks (great site when it's up; for archived version click here)
Tutis Vilis, University of Western Ontario, and here also
ViperLib (free registration required)
A site focusing on the works of Escher
University of Calgary color vision website
Some questionable sites that nonetheless have good visuals: here, here
(Warning: the second one appears to disable your browser's "back" button)
Psychology 351 student demonstrations (produced by former Rice students)
Metacontrast (Adam Stepinski, 2006)
Figure-Ground Demo (Henry Jin, 2006)
Rolling wheel demo (download; requires Flash plug-in)
Muller-Lyer and Apparent Motion (Colin Bauer, Psyc 351)
Wave motion effects (Colin Bauer, Psyc 351)
Illusory Pausing and Sticking (Brad Dodson, Psyc 351)
What's This? or This?
Shepard Boxtops Demo (Shepard, from Kubovy & Pomerantz, 1981)
Adelson Shadow Effect (Edward Adelson, MIT)
Edgerton Bullet (Harold Edgerton, photographer)
Galloping horses (Muybridge, at request of Leland Stanford)
Orders of Magnitude (Powers of 10): Time, Size
U. S. Allocation of Frequency Spectrum
Spiral Illusion (aka Frazier illusion)
Pencil in water 'optical' illusion (Pomerantz, 2002)
Depth of Field (Cornsweet, 1970); also DoF5000f4.5a, DoF4000f4.5b, DoF200f22c
Schrauf, Michael, Lingelbach, Bernd & Elke, Wist Eugene (1995) : "The Hermann grid and the scintillation effect." Perception, Vol. 24, supplement A 88
Simultaneous Contrast (weak version)
Perception of black and white: letters in shadow, remove context, natural lighting (compare with Adelson checkerboard picture, demo)
Benussi Ring (simultaneous contrast)
Metacontrast, slowed down (plus another site)
Metacontrast (Adam Stepinski, Rice, 2006)Disappearance of Stabilized Images (cf. Troxler Effect)
Visual Cortex (Scientific American, Nov. 1999)
Kanizsa's Subjective Contour Dot Window (Kanizsa, Organization in Vision, 1979)
Subjective Contour with transparency
Subjective Necker Cube (Bradley, Dumais, and Petry, 1976)
Neon Color Illusion, another, another
Dinosaur Comics: evidentialism, determinism
Scenes: Infrared; Ultraviolet vs. Visible
Spatial frequencies and face perception, more
Mach Bands: Lightness strips vs. gradient
Retinal Network Model: Mach Bands
Cornsweet Edges construction, demo
Purvis Lab demosSchrauf, Michael, Lingelbach, Bernd & Elke, Wist Eugene (1995) : "The Hermann grid and the scintillation effect." Perception, Vol. 24, supplement A 88
Benussi Ring (simultaneous contrast)
Marr - Zero Crossing 1 (David Marr, Vision, 1982)
Categorical Perception: smooth continuum vs. bands
Wavelengths for Sunlight, Tungsten
Wavelengths for Lemons, Oranges
Color Mixture - additive vs. subtractive, another additive, subtractive example
Additive color mixture in the classroom: close, far
Color afterimages 2, 3, 4, Castle illusion
Watercolor Illusion
Pinna, B., Brelstaff, G. and Spillmann, L.: Surface color from boundaries: A new 'watercolor' illusion.
Vision Research 41, 2669 - 2676 (2001)McCollough Effect: adaptation stimuli, test stimulus
Higher quality: downloadable PowerPoint, or viewable pdf version
McCollough, Celeste (1965). Color adaptation of edge-detectors in the human visual system.
Science, 149, 9, 1115-1116.Desaturating different wavelengths
Color Scission (Metelli)
Subjective Contour with transparency
Color assimilation and contrast, zoom
University of Calgary color vision website
Wolfe's figures: Cone response, desaturation functions, assumed direction of illumination, ultraviolet flowers
What webpages look like to people with color anomalies: here
The Challenge of Perceptual Organization
Examples of P.O. at work: R. C. James, Bev Doolittle, Dallenbach
Guzman: Blocks World, Intersection types
Non-additivities: Subjective Contour Apparent Motion
Various Gestalt demonstrations:
Rolling Wheel; Rolling wheel demo (download; requires Flash plug-in)
Gelb Effect (unconscious inference, from Helmholtz)
Gestalt Organization: Soap Bubble metaphor (pragnanz, or simplicity principle)
Grouping by Similarity: Texture Segmentation by Slope
Perceptual coupling
Ames Room, related demonstrations
Figure-ground segregation:
Triangle's Figure Ground relationships
Figure Ground words in a single image
Irwin Rock's Figure Ground Demonstration
Gestalt Figure Ground Law of Area
Depth edges vs. occlusion edges: Bregman's letters, Letters revealed
Multistability:
Multistability in Figure ground segregation: Rubin's Faces-Vase
Multistability: Barber Pole Motion (Hans Wallach, 1935)
Segmentation into Parts: Hoffman
Kanizsa's Subjective Contour Triangle, Dot Window
Symmetry
Symmetry Detection, horizontal symmetry
Symmetry and Figure-Ground Segregation
Symmetry Detection: Unperceived symmetry
Rock: Orientation and form, symmetry perception
Rock: Orientation and symmetry, 2
Symmetry and Figure - Ground Columns 1
Symmetry and Figure - Ground Columns 2
Impossible Figures: Penrose Triangle
Impossible Figures: 3 pronged clevis
Impossible Figures: Hochberg Cube
Impossible Figures: Modified Hochberg Cube
More non-additivities - Configural Superiority Effects: 1, 2, 3, 4
Wolfe's figures (Ch. 4) Good continuation, parsing at deep concavities, Margaret Thatcher illusion,
Figure-Ground Demo (Henry Jin, 2006)
Perception and memory for change
Change Blindness 3 (Dan Simon's website)
Apparent (beta) Motion ("objectless motion")
Ternus Effect: zero ISI, longer ISI, displaced, bar
Ambiguous Direction of Apparent Motion, another
Barber Pole Illusion (Hans Wallach)
Simple motion detection circuit
Johansson Point Light, animated, adjustable
Illusory Rotation, another, yet another, blurred; also, check Akiyoshi's site
More, more, moreMotion Aftereffect (spiral), another
Rubber Pencil Illusion 1, 2, 3, 4, video download (Pomerantz, 1983)
Gelatinous Ellipse, with surround (MIT site)
Transparency and motion: static, moving
Rolling Wheel; Rolling wheel demo, another (download; requires Flash plug-in)
Muller-Lyer and Apparent Motion (Colin Bauer, Psyc 351)
Wave motion effects (Colin Bauer, Psyc 351)
Reverse spoke illusion (Anstis & Rogers)
Illusory Pausing and Sticking (Brad Dodson, Psyc 351); video download (Pomerantz, 1984)
Crossed, uncrossed disparity and the horopter
Pictorial depth cues, more, more (including arial perspective)
Lichtenstein house: One, two, three, four, five
Depth of field cues to size, distance: one, two
Hollow faces and depth misperception
Trompe l'oeil art: finished, under construction , site, truck (pronounced "tromp loy")
Audiograms: normal and impaired
Equiloudness Contour including audiogram for humans
Acoustic Waveforms in the environment
Basilar Membrane and traveling wave
Hair Cells, opening and closing of channels
Mouse's organ of corti (courtesy of Audrey Nath and Jeff Triffo)
Timbre and Fourier Spectra for Musical Instruments
Pi - ka - pu phenomenon, spectrograms
Short-term Spectrum for Speech
Speech: Running Spectral Display
Speech Spectrograms: David Pisoni
Articulatory Apparatus in Humans
Speech signal: Multiple representations
SFS/RTGRAM for Real-time Speech Spectrogram Display
Efficient (Popout) vs. Inefficient Search
More popout: Geddes, Inconspicuous
Feature vs. Conjunction Search
