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This volume provides an overview of historical and experimental research into optical illusions of reversible perspective. This volume has been prepared during my official connection with three institutions: Clark, where it had its inception in November, 1901, Michigan and Princeton.

Optical illusions.

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Mental retardation. --- Intellectual disability.

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"The main thread of these memoirs is limited, approximately, to the first two-thirds of my professional career largely devoted to clinical practice, the organization, supervision, and administration of departments or divisions of special education for all kinds of handicapped children, the offering of courses of instruction in 28 colleges, universities, schools of education, and training schools in the fields of special education, clinical psychology, and mental hygiene, and the prosecution of investigations of widely different kinds. Although thus limited in its main stream, digressions have frequently been made in order to incorporate more recent happenings or developments which supply additional concrete illustrations of the earlier situations depicted, or additional confirmatory evidence for the implications suggested or the conclusions drawn, or additional or different practical applications. In the introduction of such commentaries the psychological, rather than the logical order has, in general, been followed. They have been introduced as asides at the relevant points in the narrative, that is, in connection with the incidents or situations that have been described. The attempt has been made to introduce these remarks in such a way as not to interfere seriously with the progress of the story. Parts of the narrative have, indeed, been brought down to 1954. The narrative may prove of interest and value to psychologists, psychiatrists, educationists, teachers, physicians, school patrons, and taxpayers, as well as to students who are preparing for service as psychologists, teachers, principals, and superintendents of publicly-supported day and residential institutions. It is hoped that this frank and truthful recital of pioneering in several areas of public service will prove, not only interesting, entertaining, and edifying, but that it will provoke action to overcome the conditions that may still interfere with the efficient operation and organization of public institutions"--Introduction. (PsycINFO Database Record (c) 2006 APA, all rights reserved).

Psychologists

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"This volume provides an overview of historical and experimental research into optical illusions of reversible perspective. This volume has been prepared during my official connection with three institutions: Clark, where it had its inception in November, 1901, Michigan and Princeton." (PsycINFO Database Record (c) 2011 APA, all rights reserved).

Optical illusions.