Illusions are the visceral experience of phenomena that are not "actually" there. This course will explore a broad range of illusions, covering all five senses with emphasis on vision and hearing. In addition to sensory phenomena, we will study illusions that have to do with time, the brain, and interactions between two or more senses. Students will learn scientific techniques for identifying and measuring psychological responses to illusions, and projects will provide opportunities for integration with existing projects or coursework in other classes.