How is our thinking organised? Do we all perceive the world in the same way? What directs our attention? The lecture provides an overview of the most important theories, findings and methods of cognitive psychology. Emphasis will be placed on visual information processing as well as on attention and memory models relevant to human-computer interaction. By the end of the semester, students should have acquired an understanding of the mechanisms of human cognition and be able to apply them to the design of good interaction designs. The course includes exercises with practical examples as well as guided data collection.