The global precedence effect is not affected in inhibition of return

This study assessed whether inhibitory processes occurring in IOR affect pe rceptual processing of hierarchically organised stimuli. Experiment 1 used a global/local task that presented stimuli to the left or the right side. R esults showed a global task advantage and a larger interference in the loca l than in the global task-the global precedence effect (GPE). These effects were larger than in previous studies using centrally presented stimuli, wh ich suggests a greater involvement of low spatial frequency analysis with p eripheral than with central stimuli. Experiment 2 combined the global/local task with IOR. Results replicated those of Experiment 1 but there was no i nteraction with stimulus location. That is, the GPE was not affected in IOR . Thus, we conclude that the GPE and inhibitory processing occurring in IOR are subserved by different mechanisms.