@article{ref1,
title="Effects of varying stop-signal probability on ERPs in the stop-signal task: do they reflect variations in inhibitory processing or simply novelty effects?",
journal="Biological psychology",
year="2008",
author="Dimoska, Aneta and Johnstone, Stuart J.",
volume="77",
number="3",
pages="324-336",
abstract="The aim of the present study was to determine whether ERP modulations associated with varying the probability of the stop-signal in the stop-signal task reflect variations in inhibitory processing, or whether they simply reflect general arousal associated with novel stimuli. This was achieved by examining the effects of probability on a control&quot;ignore-signal&quot;stimulus in addition to the stop-signal. ERP findings revealed large fronto-central N1 and P3 components that were larger in amplitude for stop-signals than ignore-signals, and when stimuli were rare (30%) compared to frequent (70%). However, probability effects were not greater for stop-signals compared to ignore-signals, discounting an interpretation exclusively in line with inhibitory processing. A principal components analysis (PCA) revealed a slow-wave ERP component that partially accounted for these probability effects. Together, the present findings indicate that ERP differences between rare and frequent stop-signals did not primarily reflect varying inhibitory requirements, but rather may be confounded by novelty effects.<p /> <p>Language: en</p>",
language="en",
issn="0301-0511",
doi="10.1016/j.biopsycho.2007.11.005",
url="http://dx.doi.org/10.1016/j.biopsycho.2007.11.005"
}