Shifting visual attention between objects and locations: Evidence from normal and parietal lesion subjects

Robert Egly, Jon Driver, Robert D. Rafal
1994 Journal of experimental psychology. General  
Space-and object-based attention components were examined in neurologically normal and parietal-lesion subjects, who detected a luminance change at 1 of 4 ends of 2 outline rectangles. One rectangle end was precued (75% valid); on invalid-cue trials, the target appeared at the other end of the cued rectangle or at 1 end of the uncued rectangle. For normals, the cost for invalid cues was greater for targets in the uncued rectangle, indicating an object-based component. Both rightand
more » ... ghtand left-hemisphere patients showed costs that were greater for contralesional targets. For righthemisphere patients, the object cost was equivalent for contralesional and ipsilesional targets, indicating a spatial deficit, whereas the object cost for left-hemisphere patients was larger for contralesional targets, indicating an object deficit.
doi:10.1037/0096-3445.123.2.161 fatcat:jcgqe7r4szdw5hdyaswy5pkkta