Brisson Benoit, Bourassa Marie-Ève
Laboratoire de cognition, neurosciences, affect et comportement (CogNAC), Université du Québec à Trois-Rivières, Trois-Rivières, Québec, Canada; Centre de recherche en neuropsychologie et cognition (CERNEC), Université de Montréal, Montréal, Québec, Canada.
Psychophysiology. 2014 Jul;51(7):611-9. doi: 10.1111/psyp.12204. Epub 2014 Mar 18.
The attentional blink (AB) refers to the decline in report accuracy of a second target (T2) when presented shortly after a first target (T1) in a rapid serial visual presentation (RSVP) of distractors. It is known that masking T1 increases the magnitude of the AB, and masking a single target (equivalent to T1) in a RSVP stream attenuates the P3 to the target in correct trials. The major purpose of the present study was to clarify how these two effects may be integrated. An intervening distractor was presented at lag 1 (T1+1), at lag 2 (T1+2), or at neither of these two lags (no distractor). T2 was always presented at lag 3, as the last item in the stream. The P3 to T1 was attenuated and the P3 to T2 delayed in the T1+1 condition compared to the two other distractor conditions. These results clearly show that masking T1 attenuates the P3 to T1 and delays the P3 to T2 in the AB. Implications for extant theories of the AB are discussed.
注意瞬脱（AB）是指在快速序列视觉呈现（RSVP）的干扰项中，当第二个目标（T2）在第一个目标（T1）之后不久呈现时，其报告准确性下降。已知掩蔽T1会增加AB的幅度，并且在RSVP流中掩蔽单个目标（等同于T1）会减弱正确试验中目标的P3波。本研究的主要目的是阐明这两种效应如何整合。在滞后1（T1 + 1）、滞后2（T1 + 2）或这两个滞后位置都不呈现（无干扰项）时呈现一个中间干扰项。T2始终在滞后3呈现，作为流中的最后一项。与其他两种干扰项条件相比，在T1 + 1条件下，T1的P3波减弱，T2的P3波延迟。这些结果清楚地表明，在注意瞬脱中掩蔽T1会减弱T1的P3波并延迟T2的P3波。文中讨论了这些结果对现有注意瞬脱理论的启示。
