Perception Demonstrations

Modified: November 12, 2001

Click on the sites below to see demonstrations of visual perception and other phenomena.

Internet Psychology Laboratory--interactive, basic, short, links, graphics, Java

Provides information and interactive demonstrations on signal detection, music scale, pitch scaling, illusions, auditory mismatch, and adaptation and constancy. http://kahuna.psych.uiuc.edu/ipl/index.html

Visual--http://kahuna.psych.uiuc.edu/ipl/vis/level_2_vis.html

Auditory--http://kahuna.psych.uiuc.edu/ipl/aud/level_2_aud.html

Cow Eye Dissection--interactive, basic, short, links, graphics

Audio requires Real Audio Player; step-by-step guide for dissection of cow eye. http://www.exploratorium.edu/learning_studio/cow_eye/index.html

The Joy of Visual Perception--book, basic, short, links, graphics

Comprehensive on-line book on visual perception. Covers all of the major aspects of visual perception. http://www.yorku.ca/eye/

Shape Constancy Demo--http://www.yorku.ca/eye/shape2.htm

Additive and Subtractive Color Mixing--http://www.yorku.ca/eye/colormx2.htm

Interactive Color Addition--http://javaboutique.internet.com/ColorFinder/

*IllusionWorks-- interactive, basic, medium, links, graphics, search, Java, Shockwave

Illusions are covered systematically. The Hall of Illusions section contains Impossible Figures and Objects, Ambiguous Illusions, Distortion Illusions, Aftereffects and Afterimages, Auditory Illusions, and Camouflage. Other sections cover art illusions, puzzles, and 3-D illusions. Java and Shockwave are required to see some of the demonstrations. http://www.illusionworks.com/

Old woman/Young woman--http://www.illusionworks.com/html/perceptual_ambiguity.html

Reversible Figures--http://www.illusionworks.com/html/depth_ambiguity.html

Barber Pole Illusion--http://www.illusionworks.com/html/barber_pole.html

Breathing Square--http://www.illusionworks.com/html/breathing_square.html

Ouchi Illusion--http://www.illusionworks.com/html/ouchi_illusion.html

Size Constancy--http://www.illusionworks.com/html/size_constancy.html

Poggendorf Illusion--http://www.illusionworks.com/html/poggendorf.html

Twisted Cord Illusion--http://www.illusionworks.com/html/twisted_cord.html

Cafe Wall Illusion--http://www.illusionworks.com/html/cafe_wall.html

Fraser Spiral Illusion--http://www.illusionworks.com/html/fraser_spiral.html

Camouflage1--http://www.illusionworks.com/html/camouflage.html

Camouflage2--http://www.illusionworks.com/html/hidden_bird.html

Ames Room--http://www.illusionworks.com/html/ames_room.html

*Visual Illusions Gallery--index, basic, short, links, graphics

Presents 21 illusions including: Necker Cube, Afterimages, The Blind Spot, and others. http://valley.uml.edu/landrigan/ILLUSION.HTML

The Munsell System of Color Notation--text, interm., medium, links, graphics, Java

Describes the Munsell system for describing colors; has links to history of system and to products available including tests of color vision. http://www.munsell.com/munsell1.htm

Vision Test--interactive, basic, short, links, graphics

A vision test users can take from their computer screen. http://www.milfordeye.com/vtest.htm#chart

Interactive Illustrations of Color Perception--interactive, interm., medium, links, graphics, Java

Provides interactive examples of how colors interact with surfaces and with each other. http://www.cs.brown.edu/research/graphics/research/illus/spectrum/home.html

Distilled Light--interactive, basic, short, links, graphics

On-line demonstration of how primary colors can be combined to form secondary colors. Users may block primary colors and see the results. http://www.exploratorium.edu/imap-expl/interf.conf?319,66

*Gestalt Psychology

Type: interactive Level: basic Length: short Links: yes Graphics: yes

Demonstrates the laws of perception from Gestalt psychology: proximity, similarity, good continuation, closure, good form, and figure-ground.

http://users.anderson.edu/~jfultz/gestalt.html

Binocular Vision, Depth Perception: How 3-D Vision Works

Type: tutorial Level: basic Length: short Links: yes Graphics: yes

Illustrates principles of stereo vision and includes an on-line test.

http://www.vision3d.com/stereo.html

Depth Perception Exhibits

Type: tutorial Level: basic Length: short Links: yes Graphics: yes

From the Exploratorium, illustrates their exhibits that use depth perception.

http://netra.exploratorium.edu/xref/phenomena/depth_perception.html

Soundry

Type: interactive Level: basic Length: long Links: yes Graphics: yes Other: Java

Award-winning site on the basic workings of the human ear that allows users to experiment with sound on-line.

http://library.advanced.org/19537/Main.html

Face Detection

Type: interactive Level: basic Length: short Links: yes Graphics: yes

From Carnegie Mellon University Robotics Institute, links to their software that recognizes faces in images. Users may submit digital images and the software will return the image with the faces marked.

http://www.ri.cmu.edu/projects/project_416.html