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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.
Includes subject section, name section, and 1968-1970, technical reports.
First multi-year cumulation covers six years: 1965-70.
It has become a truism that the frozen optical diagram representation of vision is the worst possible picture of the way in which we visually interact with the environment. Even apart from our reaction to moving targets by pursuit movements, our visual behaviour can be said to be characterised by eye movements. We sample from our environment in a series of relatively brief fixations which move from one point to another in a series of extremely rapid jerks known as saccades. Many questions arising from this characteristic of vision are explored within this volume, including the question of how our visual world maintains its perceptual stability despite the drastic changes in input associated with these eye movements.
"As for photographic systems, the human visual system can also be described by an MTF. However, due to the complexity and non-linearity of the visual system, the MTF alone is a poor predictor of response. We have formulated and tested two mathematical models which modify the MTF of the eye. Effectively, an imperfect integrating function (low pass filter) has been proposed to be operating on stimuli which are sent to the brain. The models were tested and found to be better predictors of visual response than the present MTF alone."--Abstract.