Great interactive demonstrations in experimental psychology and psychophysics, from the Exploratorium science museum in San Francisco

Joy of Visual Perception. An on-line book on the anatomy & physiology of vision, and on visual psychophysics.

Univ. of Liège, Belgium

Part of the Department of Brain and Cognitive Sciences at MIT, researching human visual perception, machine vision, and image processing. Includes profiles of group members, description of research, and gallery of perceptual illusions.

University of California at Santa Cruz Perceptual Science Laboratory site is chock full of fascinating ideas and projects on images, perception, color.

Psycholinguistics, computational modeling, cognitive neuropsychology, semantic systems (Univ. of California, Riverside)

Animal cognition, comparative psychology, and learning and behavior (UCLA)

Experimental results and theoretical ideas ranging over the fields of human, animal, and machine perception

Models of visuomotor and other learning (Univ. of California, Berkeley, USA)

An archive of papers in cognitive science, recently started by Stevan Harnad

Mobile robots and their psychology (Carnegie-Mellon Univ., USA)

An electronic community for cognitive and brain sciences, run by MIT Press. Includes access to many of their cognitive science books and journal articles, and news.

Transcripts of children`s language and software tools, run by Brian MacWhinney

Psycholinguistics (LSCP, EHESS, Paris)

"The members of this lab investigate a variety of issues in sensory perception and motor control in both infants and adults."

Brain evolution (Univ. of Washington, USA)

"Brings together faculty, students and research associates who share an interest in the nature of language, the processes by which it is acquired and used, and the mediation of language in the human brain."

Artificial intelligence (UC Berkeley, USA)

Invariance properties of the human visual system (Univ. of Mannheim, Germany)

Journal of Methodology and Experimental Psychology, freely available online. Papers in English and Spanish. Web in English. Also a resource center for Spanish Psychology, including a description of the major Spanish research groups, links to courses

Depictions of impossible figures. Optical illusions include wireframe and greyscale images, animation, and links.