27 patients (mean age 35.3 yrs) with evidence of long-standing organic brain disorders who scored in the moderately impaired range on the Luria-Nebraska Neuropsychological Battery on an initial testing were retested after 10–469 days. Test–retest correlations ranged from .77 to .96, averaging .88 over the 14 Luria scales; all correlations were significant at the .001 level. (4 ref)