Illusions: A Psychological Study by James Sully
The bo
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| Illusions: A Psychological Study |
ok was published in 1882, delves into the various aspects of illusions of perception. The book is divided into chapters that explore different types of illusions and the factors that contribute to them.
In Chapter IV, the focus is on passive illusions determined by the organism. The chapter discusses the limits of sensibility, including the relationship between the quantity of sensation and stimuli, the coalescence of simultaneous sensations, after-effects of stimulation, and the effects of prolonged stimulation. Specific topics such as the specific energy of nerves, localization of sensation, and subjective sensations are also explored. The chapter further examines the results of variations in sensibility, such as the rise and fall of sensibility, paraesthesia, and the rationale of organically conditioned illusions.
Chapter V continues the discussion on illusions of perception, this time focusing on passive illusions determined by the environment. It explores the exceptional relation of stimulus to the organ, including the displacement of organs, and exceptional arrangements of circumstances in the environment that can lead to misinterpretations of direction, movement, distance, depth, relief, and solidity. The chapter also delves into illusions in art, perception through transparent colored media, visual transformations, false recognition of objects, and inattention to sense impressions in recognition.
Chapter VI shifts the focus to active illusions, specifically preperception and illusion. It discusses the role of preperception in interpretation of visual movement, flat projections of form, and obscure impressions. The chapter also explores involuntary preperception, including the effects of permanent predisposition and partial temporary proadjustment on illusions.
A Psychological Study provides a comprehensive examination of illusions of perception, shedding light on the various factors that contribute to them. Through detailed analysis and exploration of different types of illusions, the book offers valuable insights into the complexities of human perception and cognition.