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Westcott Color Theory Slides

Psychological Tests · Psychology

Six glass slides inside a small cardboard box with accompanying instructions. Each slide has a paper label detailing its function (ex. Test for colour blindness), as well as a label indicating the proper way to insert the slide into a projector. The test also contains a small blue envelope and a “CAUTION” label concerning exposing the slides to high temperatures.

Accession Number: 2012.psy.99

Alternative Name:

Primary Materials: glass


Peeling University of Toronto Label on the side “ONE SET/TEST FOR COLOR BLINDNESS.”

Dimensions (cm):

Box: Height = 3, Width = 9, Length = 11; Slides: Width = 8.5, Length = 10

Function: Test colour blindness


Poor. Three of the six slides are broken

Associated Instruments: 2011.psy.5, 2012.psy.83, 2012.psy.100


Date of Manufacture: early 20th century


Dept. of Psychology, University of Toronto

Additional Information and References:

Historical Notes:

Murray, E. (1943). Evolution of Color Vision Tests. Journal of The Optical Society of America, Vol 33 (6), 316-334.