A COMPARISON OF NAMING ERRORS IN INDIVIDUALS WITH MILD NAMING IMPAIRMENT FOLLOWING POSTSTROKE APHASIA, ALZHEIMERS-DISEASE, AND TRAUMATIC BRAIN INJURY

In comparing individuals with stroke, AD, and TBI, who shared mild to moderate naming impairment, subtle differences in naming errors were f ound. The stroke group had a higher frequency of partial responses and derivational errors, the AD group had a higher frequency of irrelevan t description errors, and both the AD and TBI groups had a higher freq uency of visual misperceptions. Across groups, milder naming impairmen t was associated with a higher proportion of semantic errors, and more severe naming impairment was associated with errors that were not sem antic in nature. The results were most consistent with semantic bounda ry erosion.