Perceptual Modification

Perceptual Modification

Adapting to Altered Sensory Environments

1st Edition - June 28, 1978

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  • Author: Robert B. Welch
  • eBook ISBN: 9781483274782

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Perceptual Modification: Adapting to Altered Sensory Environments is about the study of human perception using a particular research strategy: the systematic alteration of vision or audition. It is assumed that by observing how the sensory apparatus copes with this disturbance it will be possible to formulate valuable hypotheses about the structure and development of ""normal"" perception and perceptual-motor coordination. The specific goals of this book are, first, to organize the vast and confusing literature on adaptation to perceptual rearrangement and, second, to assess its contribution to the understanding of ""normal"" perception and perceptual learning. The book begins with discussions of adaptation to small prism-induced displacements of the visual field. Separate chapters follow on the proposition that adaptation to prismatic displacement and other forms of rearrangement is actually a form of learning; adaptation to inverted and reversed vision; optical tilt; illusory motions of the visual field; size-depth distortions; and distortions of form. Subsequent chapters deal with studies of auditory rearrangement; examine individual and interspecies differences in adaptability; and the study of adaptation to the visual distortions encountered by the underwater observer. The book is written for researchers and graduate students in experimental psychology. It will be of value and interest whether the reader is a specialist in the area of perceptual modification, or indeed a generalist.

Table of Contents

  • Preface

    1 Introduction

    The Early Experiments

    The Experimental Paradigm

    The Definition of Adaptation to Perceptual Rearrangement

    Later Studies

    The Specific Aims of Rearrangement Research

    The Organization of the Book

    2 Adaptation to Prismatic Displacement: Necessary and Sufficient Conditions

    The Visual Effects of a Wedge Prism

    Common Varieties of Prism Exposure

    The Necessity of a Stable Rearrangement

    Assumptions about and Awareness

    The Perceptual Situation

    The Role of Bodily Movement

    Informational Sources of Prism Adaptation

    Summary and Conclusions

    Addendum: a Comparison of Visual and Tactual Feedback as Sources of Prism Adaptation

    3 Adaptation to Prismatic Displacement: End Products

    The Immediate Effects of Prism Exposure

    The Long-Term Effects of Prism Exposure

    Summary and Conclusions

    4 Adaptation as Learning

    Characteristics of Learning and Adaptation

    The Effect of "Learning Variables"

    Necessary Conditions: the Motivation for Adaptation

    Summary and Conclusions

    5 Adaptation to Visual Transposition

    The "Problem" of the Inverted Retinal Image

    Studies of Transposed Vision

    A Hypothetical Subject's Initial Experience with Optical Inversion

    Three Aspects of Spatial Vision

    The Response of a Hypothetical Subject to Optical Inversion

    Reports from Actual Subjects

    Why so Little Evidence of Visual Adaptation?

    Theories of Visual Adaptation to Optical Transposition

    Summary and Conclusions

    6 Adaptation to Optically Induced Tilt

    Environmental versus Egocentric Orientation

    The Isolation of Adaptive Changes

    Egocentric Orientation

    The Problem of "Configurational Adaptation"

    Genuine Optical Tilt Adaptation

    General Findings and Theories of Optical Tilt Adaptation

    Summary and Conclusions

    7 Adaptation to the Loss of Visual Stability

    The Constancy of Visual Direction and Visual Position

    Mechanisms of Visual Direction Constancy (VDC)

    Mechanisms of Visual Position Constancy (VPC)

    Adaptation to the Loss of Visual Direction and Position Constancy

    Summary and Conclusions

    8 Adaptation to Distortions of Depth, Distance, and Size

    Adaptation to Distortions of Depth

    Adaptation to Distortions of Distance

    Adaptation to Distortions of Size

    Summary and Conclusions

    9 Adaptation to Distortions of Form

    Adaptation to Prismatically Induced Curvature

    Adaptation to Distortions of Closed Figures

    Summary and Conclusions

    10 Adaptation to Auditory Rearrangement

    The Early Studies

    Later Studies

    The Relationship Between Visual and Auditory Adaptation

    Summary and Conclusions

    11 Interspecies and Individual Differences in Adaptability

    Adaptation in Nonhuman Organisms

    Individual Differences in Human Subjects

    12 Adaptation to Underwater Distortions

    Varieties of Underwater Optical Distortion

    Visual Experience Underwater

    "Immediate" Adaptation to Underwater Distortions

    "Long-Term" Adaptation to Underwater Distortions

    Summary and Conclusions

    13 Conclusions: What Have We Learned?

    The Nature of Perceptual and Perceptual-Motor Plasticity

    The Nature-Nurture Issue

    Contributions to the Understanding of Perception and Perceptual-Motor Coordination


    Author Index

    Subject Index

Product details

  • No. of pages: 362
  • Language: English
  • Copyright: © Academic Press 1978
  • Published: June 28, 1978
  • Imprint: Academic Press
  • eBook ISBN: 9781483274782

About the Author

Robert B. Welch

About the Editors

Edward C. Carterette

Morton P. Friedman

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