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This book deals with the construction and use of the Bellevue Adult Scale which the author has spent seven years in developing and standardizing. The chief advantages of the Bellevue Scale as a diagnostic instrument are held to be that it covers a wide range of intellectual abilities, motor as well as verbal; that it can be modified
in cases of sensory defect or unusual environment; that it is standardized over the age range of seven to seventy on a selection typical of occupational and educational distribution at every age; and that it is simple in administration, objective in scoring and highly reliable.
The chapter headings give some idea of the author's approach to his task: The Nature of Intelligence; The Need for an Adult Intelligence Scale; The Concept of Mental Age and I.Q.; The Classification of Intelligence; The Concept of Mental Deficiency; The Problem of Mental Deterioration; The Selection and Description of Tests; The Population used in Standardizing Tests; Standardization and Results; Limitations and Special Merits. The chapters dealing with the nature of intelligence, the classification of intelligence and the concepts of mental age and mental deficiency constitute especially fine summaries of certain theoretical and practical considerations in clinical psychology which deserve to be better understood by psychiatrists who are too often handicapped because their training in psychology has been limited in both extent and character.
In the last part of the book is given The Manual of the Bellevue Intelligence Tests, including general instructions for the use of these tests and directions for the individual tests. The Manual is followed by a concise exposition of the special statistical methods which were used to treat the material and to make the necessary corrections in the process of standardization. This is followed by a series of carefully prepared tables of intelligence quotients for the various age levels and for both performance and verbal sc