Abstract: Two experiments were designed in present study to examine the asymmetrical effect in audiovisual additional singleton search task. Experiment 1 wais a location orientation task, we found that the auditory singleton can capture visual attention when it was in the same spatiality with the target, but visual cues cannot capture auditory attention no matter which spatial side it was. The results suggested that there was a cross-modality effect in stimulus-driven capture; the asymmetrical effect was also existed. In experiment 2, we found that every auditory cue can capture visual attention, but neither of visual cues can capture auditory attention. The present study demonstrated the cross modality asymmetrical effect in audiovisual additional singleton search task. In the same time, the research confirmed that there is a supramodal attention control audiovisual stimulus-driven capture task.

Key words: attention capture, stimulus-driven, audiovisual modality, cross-modality effect, asymmetrical