» IllusionWorks   - A multimedia museum of optical and sensory illusions, with on-line demonstrations and explanations.

» Affective Epistemology - Affective epistemology is based on the idea that there is a way of knowing which transcends, specific perceptual frames. This idea is predicated on affective components as indicating the quality of a given perception, thought form, or way of being in the consciousness of human beings and other sentient life.

» The Blanking Phenomenon and its Psychoanatomical Implications - J J McAnany and M W Levine of the Department of Psychology, University of Illinois at Chicago provides information on this visual illusion. [PDF]

» Chronological History of Vision Research - Useful chronology by Jack Yellott.

» HuWI.org: The Purple Perils of James Gibson - A collection of notes compiled by James J. Gibson, 1904 - 1979, for his perception seminars.

» The Logarithmic Time Perception Hypothesis - Logtime is the psychochronometric hypothesis that our age is our basis for estimating long time intervals, resulting in a perceived logarithmic shrinkage of our years as we grow older.

» The Manifold of Sense - A survey of the discourse regarding emotions, sensations, and an attempt at producing an integrative approach to sensation and perception.

» Mind Bluff - A family-friendly collection of tactile illusions, mental deceptions, optical tricks, brain puzzlers, and feeling games to play on the self.

» Mind Hacks - Neuroscience and psychology tricks discussed and perhaps explained. Companion site to the "Mind Hacks" book by Tom Stafford and Matt Webb.

» The Moon Illusion Explained - A relatively new theory is offered for the classic illusion that the moon's constant subtended visual angle of half a degree appears larger for the horizon moon than for the zenith moon.

» Neuhoff, John - Auditory Perception Research - Electronic reprints of relevant publications on pitch, loudness, localization, and auditory display. (College of Wooster, USA)

» The Noh Mask Effect - Demonstrates illusory facial expression perception with Japanese Noh masks. Links to publications about the effect.

» Optical Flow Estimation Bibliography - Mainly algorithms (up-to-date; compiled by Laurenz Wiskott at The Salk Institute).

» Optical Illusions by Psych ARTS - We think we perceive objective reality, but perception is always altered by invisible biases. We are never free of the state-dependent bias, and so we are continually taken in by an illusion.

» The Poggendorff Illusion - A study attributing the illusion to summed effects of cardinal axes in the observer's field of view and of salient axes in the figures.

» Sensation and Perception Tutorials - A small collection of tutorials and demonstrations in sensation and perception.

» Smarandache's Law - An improvement of Weber's and Fechner's Laws on sensations and stimuli. A paradoxical complex, an optical illusion, and a test of intelligence.

» Some Visual Illusions - This site shows a range of common visual illusions along with a brief explanation of why they occur. It was originally prepared to show at a children's primary school as part of their study of sensory processing.

» Vision Laboratory Macquarie University - Contains information about current research into human visual perception. Features material from some of the courses run by the psychology department and information about staff and students.s

» Visual Illusions: Their Causes, Characteristics and Applications - Matthew Luckiesh's book of this title, published in 1922, was the first scientific explanation of optical illusions to be published.

» Visual Science Group: University of Helsinki - Research at the Department of Psychology, is focused on human visual processing using psychophysical methods.