ILLUSTRATION CREDITS

Here “A Re-creation of the ‘Dress’ Phenomenon,” courtesy of Michael Rudd and Annette Werner (demonstration) and Maria Olkkonen (photograph).

Here “The World’s Largest Brightness Illusion,” used by permission of Barton Anderson and Jonathan Winawer.

Here “Here Comes the Sun,” courtesy of estate of Alan Stubbs.

Here “The Primal Flashlight,” used by permission of Lothar Spillmann, Joe Hardy, Peter Delahunt, Baingio Pinna, and John Werner.

Here “Weaves and the Hermann Grid,” used by permission of Kai Hamburger and Arthur G. Shapiro.

Here “The Illusion of Sex,” used by permission of Richard Russell.

Here “Rubik’s Cubes,” courtesy of Dale Purves, R. Beau Lotto, and Surajit Nundy, from “Why We See What We Do,” Sinauer Associates. 2003.

Here “Birds in a Cage,” image provided by Martinez-Conde and Macknik Laboratories.

Here “Color Dove Illusion,” used by permission of Yuval Barkan and Hedva Spitzer.

Here “White’s Effect,” image provided by Martinez-Conde and Macknik Laboratories.

Here “Dynamic Size Contrast Illusion,” used by permission of Gideon Caplovitz and Ryan Mruczek.

Here “The Dynamic Ebbinghaus Illusion,” used by permission of Christopher Blair, Gideon Caplovitz, and Ryan Mruczek.

Here “Fat Face Thin Illusion,” used by permission of Glenn Francis.

Here “Head Size Illusion,” used by permission of Kazunori Morikawa and Eri Ishii.

Here Checkerboard pattern shape illusion, used by permission of Michael McCamy.

Here “It’s a Circle, Honest!” used by permission of David Whitaker.

Here “Coffer Illusion,” used by permission of Anthony Norcia, Stanford University.

Here “The Healing Grid,” used by permission of Ryota Kanai.

Here “Shepard’s Sarcophagai,” courtesy of Daniel Picon. Copyright © 2013, Daniel Picon.

Here“Another Turn,” used by permission of Lydia M. Maniatis.

Here “Stretching Out in the Tub,” used by permission of Lydia M. Maniatis.

Here “The More-or-Less Morphing Face Illusion,” used by permission of Rob van Lier and Arno Koning.

Here “Yang’s Iris Illusion,” courtesy of Jisien Yang and Adrian Schwaninger. Copyright © Dr. Jisien Yang and Prof. Dr. Adrian Schwaninger.

Here “Illusory Pyramid,” courtesy Pietro Guardini and Luciano Gamberini.

Here “Skyscrapers and Clouds,” used by permission of Sandro Bettella, Clara Casco, and Sergio Roncato

Here “Cubistic Lands,” used by permission of Sandro Bettella, Gianluca Campana, Clara Casco, and Sergio Roncato

Here “Mother, Father and Daughter: A Three-Aspect Ambiguous Figure,” copyright © by the Board of Trustees of the University of Illinois. Used with permission of the University of Illinois Press.

Here“Mask of Love,” courtesy of Gianni Sarcone, Courtney Smith, and Marie-Jo Waeber. Copyright © Gianni A. Sarcone, giannisarcone.com. All rights reserved.

Here “Ghostly Gaze,” used by permission of Rob Jenkins.

Here “Ames Room,” courtesy of Jordi Nieva, copyright © Fundación “La Caixa.”

Here “The Leaning Tower Illusion,” used by permission of Frederick Kingdom, Ali Yoonessi, and Elena Gheorghiu.

Here Petronas Twin Towers, used by permission of Thomas Haltner.

Here Checkered box, used by permission of Frederick A. A. Kingdom, Ali Yoonessi, and Elena Gheorgiu.

Here Manga girls, used by permission of Akiyoshi Kitaoka.

Here “A Turn in the Road,” used by permission of Kimberley Orsten and James Pomerantz.

Here “Age Is All in Your Head,” used by permission of Victoria Skye.

Here“Through the Eyes of Giants,” used by permission of Arash Afraz and Ken Nakayama.

Here “Stereo Vision Produces New Illusory Contours!” used by permission of Davi Geiger and Hiroshi Ishikawa.

Here “Hidden Strength of the Classical Simultaneous Contrast Illusion,” image provided by Martinez-Conde and Macknik Laboratories.

Here “Nerve Impulse,” courtesy of José Ferreira W.

Here “The Spinning Disks Illusion,” used by permission of Johannes Zanker.

Here “The Enigma Illusion,” both images used by permission of Jorge Otero-Millan.

Here “The Rotating-Tilted-Lines Illusion,” used by permission of Simone Gori and Kai Hamburger.

Here “Pulsating Heart,” courtesy of Gianni Sarcone, Courtney Smith, and Marie-Jo Waeber. Copyright © Gianni A. Sarcone, giannisarcone.com. All rights reserved.

Here “The Blurry Heart Illusion,” used by permission of Kohske Takahashi, Ryosuke Niimi, and Katsumi Watanabe.

Here “The Rotating Snakes Illusion,” used by permission of Akiyoshi Kitaoka.

Here “Snakes on a Brain,” used by permission of Jorge Otero-Millan.

Here “Pinna Illusion,” used by permission of Baingio Pinna.

Here “Floating Star,” used by permission of Joseph Hautman, aka Kaia Nao. Copyright © Kaia Nao.

Here “Impossible Illusions,” image provided by Martinez-Conde and Macknik Laboratories.

Here “Impossible Motion: Magnetic Slopes,” courtesy of Kokichi Sugihara. Copyright © 2009 by Kokichi Sugihara.

Here “Elusive Arch,” used by permission of Dejan Todorovi´c.

Here “Impossible Illusory Triangle,” used by permission of Christopher Tyler.

Here Three Bar Cube, used by permission of Guido Moretti.

Here “Twisted Hands,” used by permission of K. Brandon Barker and Claiborne Rice.

Here “The Disappearing Hand Trick,” image provided by Robert Alexander.

Here “The Knobby Sphere Illusion,” used by permission of Peter Tse.

Here “Fishbone Illusion,” courtesy of Masashi Nakatani. Copyright © Masashi Nakatani.

Here Mac King performing onstage, used by permission of Mac King.

Here The Amaz!ng Randi and Dan Simons in a gorilla suit, used by permission of the estate of Alan Stubbs.

Here “The Monkey Business Illusion,” figure provided by Daniel Simons, www.theinvisiblegorilla.com. From Simons, D. J., & Chabris, C. F. (1999). Gorillas in our midst: Sustained inattentional blindness for dynamic events. Perception, 28, 1059–1074.

Here “Attention to Brightness,” used by permission of Peter Tse.

Here “Attention to Color,” used by permission of Peter Tse.

Here “Attention to Afterimages,” used by permission of Peter Tse.

Here “Expanding Flowers,” used by permission of Akiyoshi Kitaoka.