“…Requests for reprints should be sent to Gordon J. Chelune, who is now at the Department of Psychology, University of Georgia, Athens, Georgia 30602. Feirstein, 1972;Shearn, Berry, & Fitzgibbons, 1976;Small, Small, Milstein, & Moore, 1972), other investigators have found considerable overlap between the groups, particularly where schizophrenic samples were involved (Fernald, Fernald, & Rines, 1966;Lacks, Colbert, Harrow, & Levine, 1970;Orgel & McDonald, 1967;Taylor, Abrams, & Gaztanaga, 1975;Watson, Thomas, Anderson, & Felling, 1968). Klonoff, Fibiger, and Hutton (1970) found that the degree of impairment on a battery of neuropsychological tests was more closely related to the degree of psychiatric disturbance than to the presence or absence of documented neurological disease.…”