XOR style tasks for testing visual object processing in monkeys

Vision Res. 2006 May;46(11):1804-15. doi: 10.1016/j.visres.2005.11.023. Epub 2006 Jan 9.


Using visually complex stimuli, three monkeys learned visual exclusive-or (XOR) tasks that required detecting two way visual feature conjunctions. Monkeys with passive exposure to the test images, or prior experience, were quicker to acquire an XOR style task. Training on each pairwise comparison of the stimuli to be used in an XOR task provided nearly complete transfer when stimuli became intermingled in the full XOR task. Task mastery took longer, accuracy was lower, and response times were slower for conjunction stimuli. Rotating features of the XOR stimuli did not adversely effect recognition speed or accuracy.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Animals
  • Behavior, Animal / physiology
  • Learning / physiology
  • Macaca mulatta
  • Male
  • Pattern Recognition, Visual / physiology*
  • Photic Stimulation / methods
  • Psychomotor Performance
  • Reaction Time / physiology
  • Rotation
  • Sensory Thresholds / physiology