Spatial attention and memory were compared in young and old subjects using non-delayed
and delayed matching-to-sample tests. Both young and older subjects revealed a right
hemisphere superiority for spatial processing. Older subjects were as accurate as young
controls in the non-delay task supporting preserved attention ability in this spatial task.
However, older subjects were impaired at 3 s retention intervals supporting an encoding
and/or retrieval deficit in spatial memory. Stimulus evaluation demands were highest in the …