These essays tackle some of the central issues in visual cognition, presentingexperimental techniques from cognitive psychology, new ways of modeling cognitive processes oncomputers from artificial intelligence, and new ways of studying brain organization fromneuropsychology, to address such questions as: How do we recognize objects in front of us? How do wereason about objects when they are absent and only in memory? How do we conceptualize the threedimensions of space? Do different people do these things in different ways? And where are theseabilities located in the brain?While this research, which appeared as a special issue of the journalCognition, is at the cutting edge of cognitive science, it does not assume a highly technicalbackground on the part of readers. The book begins with a tutorial introduction by the editor,making it suitable for specialists and nonspecialists alike.Steven Pinker is Associate Professor,Department of Psychology and Center for Cognitive Science at MIT.