The attentional blink unveils the interplay between conscious perception, spatial attention and working memory encoding.
Eyal Alef Ophir, Guido Hesselmann, Dominique Lamy
Consciousness and cognition October 1, 2020 Peer reviewed DOI: 10.1016/j.concog.2020.103008 via PubMed
Summary
The attentional blink limits our ability to perceive two events close together in time. Across three experiments, consciously perceiving the first event was necessary but not sufficient to cause the blink; spatial attention alone was neither necessary nor sufficient. The blink occurred only when the consciously perceived first event matched the task goal for the second event, suggesting that encoding the first event into working memory triggers the blink.
Study at a glance
| Design | experimental study |
|---|---|
| Key finding | Consciously perceiving a task-relevant first event, but not spatial attention alone, causes the attentional blink, likely due to encoding into working memory. |
Abstract
Our ability to perceive two events in close temporal succession is severely limited, a phenomenon known as the attentional blink. While the blink has served as a popular tool to prevent conscious perception, there is less research on its causes, and in particular on the role of conscious perception of the first event in triggering it. In three experiments, we disentangled the roles of spatial attention, conscious perception and working memory (WM) in causing the blink. We show that while allocating spatial attention to T1 is neither necessary nor sufficient for eliciting a blink, consciously perceiving it is necessary but not sufficient. When T1 was task irrelevant, consciously perceiving it triggered a blink only when it matched the attentional set for T2. We conclude that consciously perceiving a task-relevant event causes the blink, possibly because it triggers encoding of this event into WM. We discuss the implications of these findings for the relationship between spatial attention, conscious perception and WM, as well as for the distinction between access and phenomenal consciousness.