Patient WS was tested on a simple spatial task requiring him to say whether a square was at the top, middle, or bottom of a tall rectangle. Results indicated that the process of determining the square's location within the rectangle 2 O was performed by the hemisphere that first received the stimulus (L hemisphere for RVF stimuli, R hemisphere for LVF stimuli) O was at least usually performed by the left hemisphere for both LVF and RVF stimuli O was at least usually performed by the right hemisphere for both LVF and RVF stimuli O none of the above