T-tests examining the incongruency by SOA interaction for RTs, collapsed across attended modality and SOA-arrangement.

Significant facilitation and full interference effects (at the Bonferroni corrected alpha level of 0.006 [corrected for 9 tests]) were found even when the irrelevant stimulus came 200 ms after the relevant one, noted with bold. The interference effects were generally smaller and lasted for substantially less time, only being significant up to −100 ms.