TY - JOUR PY - 2005// TI - Driver landmark and traffic sign identification in early Alzheimer's disease JO - Journal of neurology, neurosurgery, and psychiatry A1 - Dawson, Jeffrey D. A1 - Shi, Qichang A1 - Anderson, Steven W. A1 - Rizzo, Matthew A1 - Uc, Ergun Y. A1 - Uc, Ergun Y SP - 764 EP - 768 VL - 76 IS - 6 N2 - OBJECTIVE: To assess visual search and recognition of roadside targets and safety errors during a landmark and traffic sign identification task in drivers with Alzheimer's disease. METHODS: 33 drivers with probable Alzheimer's disease of mild severity and 137 neurologically normal older adults underwent a battery of visual and cognitive tests and were asked to report detection of specific landmarks and traffic signs along a segment of an experimental drive. RESULTS: The drivers with mild Alzheimer's disease identified significantly fewer landmarks and traffic signs and made more at-fault safety errors during the task than control subjects. Roadside target identification performance and safety errors were predicted by scores on standardised tests of visual and cognitive function. CONCLUSIONS: Drivers with Alzheimer's disease are impaired in a task of visual search and recognition of roadside targets; the demands of these targets on visual perception, attention, executive functions, and memory probably increase the cognitive load, worsening driving safety. LA - SN - 0022-3050 UR - http://dx.doi.org/10.1136/jnnp.2004.049338 ID - ref1 ER -