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Center on Human Development and Disability

Washington National Primate Research Center
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Infant Primate Research Laboratory

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WGTA Tests of Learning and Memory

The Wisconsin General Test Apparatus (WGTA) has a long history of use in nonhuman primate research on learning and memory. For the WGTA tests, the monkey is placed in a testing cage equipped with a sliding opaque door that can be raised and lowered to allow access to a presentation board located in front of the cage. The presentation board has two shallow wells, one on the right and one on the left. The tester, sitting behind a screen that has been lowered places a food reward (grape or apple bit) in one of the wells on the presentation board and then covers the wells with test stimuli (3-dimensional junk objects/toys). The tester then raises the door to allow the monkey access to the presentation board. The monkey is given a certain amount of time to displace one of the test stimuli and, if correct, to obtain the fruit reward that was hidden in the well.

Once a response has been made, the sliding opaque door is lowered, the response is scored as correct or incorrect, and the next trial is set up. Infants start on this series of learning tests at 4 months and continue through 10 months. Our current WGTA test battery includes those tests listed below. Please click on links for detailed information on each WGTA test.

WGTA test apparatus
Wisconsin General Test Apparatus.

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University of Washington • Center on Human Development and Disability Box 357920 • Seattle WA 98195-7920 USA • 206-543-7701 • chdd@u.washington.edu