Searching for targets in left and right visual fields

We report two experiments investigating the hemispheric specialisation of mechanisms that search for visual stimuli. In the first experiment, participants search for an inverted T set among a homogeneous set of upright T's. In the second experiment, the target was a domino block set among similar blocks which had been inverted. The results of both studies show that error tate was linearly related to display size in the left but not the right hemisphere. We suggest that the results are consistent with the lateralized extraction of target-distractor relationships. (C) 1999 Academic Press.