Re-examining electrophysiological evidence for proactive suppression of salient visual distractors
摘要
Salient-but-irrelevant color singletons often elicit a positive component in the event-related potential (the PD) rather than a negative component associated with attentional selection (the N2pc). The positivity is often assumed to reflect inhibitory control processes that prevent salience-driven distraction, particularly when the positivity emerges before the time range of the N2pc. To be certain that this “early PD” is associated with inhibition, it is necessary to show that the positivity is absent when participants search for the color singleton. Here, we replicated a seminal letter-search task in which a singleton distractor was found to elicit an early positivity (Experiment