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April 1933

Principles of Mental Development.

Arch NeurPsych. 1933;29(4):928-929. doi:10.1001/archneurpsyc.1933.02240100247020

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In this book the authors have attempted to develop a text in educational psychology based on the Gestalt theory. In a previous book one of the authors (Wheeler) formulated eight laws based on his ideas of psychology, and these laws are made the foundation of the present work. They are all various expressions of the fact that the change of a part of a mental reaction is not in itself important except as it changes the complete picture of the situation or behavior. An example of one of these laws is the law of field "genesis." It is expressed thus: "This law asserts that wholes are not composed of parts, or expressed by parts, but for purposes of description are reducible to them." Another law is that of "individualization": "The law states that the parts of wholes come into existence through an emergence process called individualization, of structuralization or differentiation."

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