ISSN : 1226-9654
We ran two experiments to determine; 1) if interference due to competing responses (such as occurs in the Stroop task) can be reduced by between-hemisphere separation of target and distractor, and 2) if between-hemisphere separation of target and distractor was effective in reducing interference when the peripheral cue drove spatial attention to the distractor. In Experiment 1 where the peripheral cue was not provided, interference in the between- and within-hemisphere condition did not differ from each other. In Experiments 2, a peripheral cue of high validity was presented sometimes to the target location and sometimes to the distractor location. The results of Experiment 2 showed that between-hemisphere separation of target and distractor could effectively protect target processing from a distractor that mistakenly drew attention. The present results imply a possible role of an interhemispheric shielding mechanism to prevent wrong responses to the mistakenly selected stimulus at the attended location.
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