We all know that in ERP research accurate timing is crucial since we identify the ERP components via topography, amplitude but also strongly on their latency. We do describe a negative deflection around 100 ms as an N1 or N100. We know from the literature how cognitive states or certain subjects groups may show differences in their ERP’s amplitudes and latencies. Therefore being sure about your marker timing is a critical component of your research results.
Several of our BrainVision Analyzer 2 users acquire their data with recording stations from third party companies. It may be the case that for such a recording set-up that the actual stimulus timing may not match the marker in the EEG stream for various reasons. If such an offset is know it can be easily accounted for during the analyses. However, if the delay is not known the user will analyze the data and get wrong results. Those data need to be reprocessed to obtain correct results. This article is about how to do this quick and easy with BrainVision Analyzer 2.
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