Determine about the Halstead's method
Reitan adopted Halstead's methods and various test procedures and with them established a laboratory at the University of Indiana. He supplemented these tests with a number of additional procedures in order to obtain greater comprehensiveness and initiated a clinical research program that is ongoing. The program began with cross validation of the battery and expanded into numerous areas, including validation of new tests added to the battery (e.g. the Trail Marking Test), lateralisation and localisation of function, aging, and neuropsychological aspects of a wide variety of disorders such as alcoholism, hypertension, disorders of children, and mental retardation.