THE ECOLOGICAL APPROACH TO VISUAL PERCEPTION This book, fi rst published in 1979, is about how we see: the envir onm ent around us (its surfaces, their layout, and their colors and textures); where we are in the enviro nm ent; whether or not we are moving and, if we are, where we are going; what things are good for; how to do things (to thread a needle or drive an auto mobile); or why things look as they do. The basic assumpt ion is that vision depends on the eye which is connec ted to the brain. The author suggests that natural vision depends on the eyes in the head on a body suppor ted by the ground, the brain being only the central organ of a complete visual system. When no constraints are put on the visual system, people look around, walk up to some thing intere sti ng and move around it so as to see it from all sides, and go from one vista to another. That is natural vision — and what this book is about. James J. Gibson (1904–1979) is one of the most important psychologists of the 20th Century, best known for his work on visual perception. He received his Ph.D. from Princeton University and his fi rst major work was The Perception of the Visual World (1950) in which he rejected behaviorism for a view based on his own experimental work. In his later works, including T he Ecological Approach to Visual Perception (1979), Gibson became more philosophical and criticized cognitivism in the same way he had attacked behaviorism before, arguing strongly in favor of direct perception and direct realism, as opposed to cognitivist indirect realism. He termed his new approach “ecological psychology”. Gibson’s legacy is increasingly infl uential on many contemporary movements in psychology, particularly those considered to be post-cognitivist. Psychology Press Classic Editions The P sychology Press Classic Editions series celeb rates a commit ment to excel lence in schol ar ship, teach ing, and learni ng within the fi eld of Psychology. The books in this series are widely recog nized as time less class ics, of continu ing import ance for both students and research ers. Each title contains a completely new intro duct ion which explores what has changed since the books were fi rst published, where the fi eld might go from here and why these books are as relev ant now as ever. Written by recog nized experts, and cover ing core areas of the subject, the Psychology Press Classic Editions series presents funda mental ideas to a new gener a tion. The Ecological Approach to Visual Perception (Classic Edition) By James J. Gibson Essentials of Human Memory (Classic Edition) By Alan Baddeley Uncommon Understanding (Classic Edition): Development and Disorders of Language Comprehension in Children By D.V.M. Bishop Essential Cognitive Psychology (Classic Edition) By Alan J. Parkin Human Cognitive Neuropsychology (Classic Edition) By Andrew W. Ellis and Andrew W. Young Lev Vygotsky (Classic Edition): Revolutionary Scientist By Fred Newman and Lois Holzman The New Psychology of Language (Classic Edition): Cognitive and Functional Approaches To Language Structure, Volume I Edited by Michael Tomasello The New Psychology of Language (Classic Edition): Cognitive and Functional Approaches To Language Structure, Volume II Edited by Michael Tomasello Principles of Learning and Memory (Classic Edition) By Robert G. Crowder Psychologists on Psychology (Classic Edition) By David Cohen Attention and Emotion (Classic Edition) By Adrian Wells and Gerald Matthews Cross-Cultural Roots of Minority Child Development (Classic Edition) Edited by Patricia M. Greenfi eld and Rodney R. Cocking Mind and Media: The Effects of Television, Video Games, and Computers (Classic Edition) Patricia M. Greenfi eld This page intentionally left blank THE ECOLOGICAL APPROACH TO VISUAL PERCEPTION Classic Edition James J. Gibson Classic Edition published 2015 by Psychology Press 711 Third Avenue, New York, NY 10017 and by Psychology Press 27 Church Road, Hove, East Sussex BN3 2FA Psychology Press is an imprint of the Taylor & Francis Group, an informa busi ness © 2015 Taylor & Francis The right of Psychology Press to be iden tifi ed as Publisher of this work has been assert ed in accord ance with sections 77 and 78 of the Copyright, Designs and Patents Act 1988. All rights reserved. No part of this book may be reprin ted or repro duced or util ised in any form or by any elec tronic, mech an ical, or other means, now known or here after inven ted, includ ing photo copy ing and record ing, or in any inform at ion storage or retrieval system, without permis sion in writing from the publish ers. 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First published by Taylor & Francis Group, 1986 Library of Congress Cataloging in Publication Data A catalog record for this book has been requested ISBN: 978-1-84872-577-5 (hbk) ISBN: 978-1-84872-578-2 (pbk) ISBN: 978-1-315-74021-8 (ebk) Typeset in Bembo by Refi neCatch Limited, Bungay, Suffolk, UK To my son and daugh ter with pride and to Eli, Michael, and Elizabeth with love This page intentionally left blank TABLE OF CONTENTS Preface xi Introduction xiii Introduction to the Classic Edition xvii PART I The Environment to be Perceived 1 1 The Animal and the Environment 3 2 Medium, Substances, Surfaces 12 3 The Meaningful Environment 28 PART II The Information for Visual Perception 39 4 The Relationship Between Stimulation and Stimulus Information 41 5 The Ambient Optic Array 58 6 Events and the Information for Perceiving Events 85
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