A Descriptive Analysis of the Halstead Battery of Neuropsychological Tests, the Theory of Biological Intelligence, and the Life of a Brain-Damaged Youth
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The purpose of this paper is to provide a composite presentation of the work done by Dr. Ward C. Halstead. It emphasizes the scope of his accomplishments rather than the depth of his research. In the first part of the paper theories of intelligence that are relevant to his work are reviewed. The Halstead Battery of Neuropsychological Tests, which he designed to measure the temporary and permanent effects of brain lesions upon higher mental processes is then discussed. His theory of biological intelligence, derived from data on the performance of normal and brain-damaged people on the battery, is described. It is defined as that type of intelligence which is disturbed by critical lesions in one or both pre-frontal lobes and is based on four factors, considered in this paper, which are differentially altered in various brain injuries. In the second part of the paper the life-history of one of Dr. Halstead’s brain-damaged patients is reviewed because it illustrates the counseling nature of his work: to help guide the brain-damaged person towards achieving his maximum potential as a human being.