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This book presents an interesting method of evaluating the results of a battery of psychological tests. In it, the authors, Psychologists at the Topeka (Kansas) Veterans Administration Hospital, report testing more than 100 patients with a 41-part modified Halstead battery, then evaluating the test scores by the use of "keys." A key is a large number of predetermined criteria, put forth in terms of point scores on individual tests, which provide a means of placing a patient's overall performance into categories of brain damage. The "localization key," for instance, allows for right hemisphere, left hemisphere, and diffuse damage. The "process key" provides the categories acute brain damage, static brain damage, and congenital brain damage.
A stated aim of the authors in devising the keys was to enable "a technician or clerk, without knowledge of neurology, neuropsychology, or psychometrics" to categorize, etiologically in some cases, a patient's brain lesion. Within their
Deuel RK. Assessment of Brain Damage: A Neuropsychological Key Approach.. Arch Neurol. 1971;25(1):95. doi:10.1001/archneur.1971.00490010105020