The present study examined the efficacy of the New York University visual scanning training program in treating patients with left-sided hemi-inattention and homonymous hemianoptic problems resulting from right hemispheric cortical lesions secondary to middle cerebral artery strokes. The study examined changes on a visual scanning task as well as generalization of training to obstacle course performances requiring the subjects to navigate their wheelchairs through a runway lined with chairs. Three male subjects were trained on the scanner in a stationary position and while they moved their wheelchairs. Progress was assessed using a multiple baseline across subjects design. Results revealed that all subjects showed systematic changes on the scanner task. Generalization of training to the obstacle course was more variable with one subject showing considerably fewer errors and the other subjects showing less impressive improvements in performance. A 1-year follow-up suggested that the scanning skill was maintained in all subjects. The need for adequate task analysis and training procedures which include all relevant cognitive/behavioral skills is discussed. In addition, the authors discuss the problems of attaining an adequate pretraining assessment of the brain-impaired subjects' behavioral/cognitive repertoire.