A re-examination of the impact of object processing on shifts of spatial attention.

When two targets are presented in rapid succession at the same spatial location, processing of the first is highly efficient, while processing of the second is often profoundly impaired at brief inter-target intervals (attentional blink; AB). While the AB has been shown to impact many processes, it is still unclear whether this includes the ability to shift spatial attention. The present study examined this question using a more sensitive dependent measure than past studies; namely, response times. It also evaluated whether masking of the cue stimulus modulated the effect of the AB on spatial shifts. The results showed significant cueing effects on T2 response times that were strongly modulated by the AB. This supports suggested links between mechanisms underlying object processing and spatial shifts of attention.