Internal Consistency of Event-Related Potentials Associated with Cognitive Control: N2/P3 and ERN/Pe |
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| Authors: | Wim J R Rietdijk Ingmar H A Franken A Roy Thurik |
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| Institution: | 1. Department of Applied Economics, Erasmus School of Economics, Erasmus University Rotterdam, Rotterdam, The Netherlands.; 2. Institute of Psychology, Erasmus University Rotterdam, Rotterdam, The Netherlands.; 3. Panteia, Zoetermeer, The Netherlands.; 4. GSCM-Montpellier Business School, Montpellier, France.; University of Texas at Dallas, United States of America, |
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| Abstract: | Recent studies in psychophysiology show an increased attention for examining the reliability of Event-Related Potentials (ERPs), which are measures of cognitive control (e.g., Go/No-Go tasks). An important index of reliability is the internal consistency (e.g., Cronbach''s alpha) of a measure. In this study, we examine the internal consistency of the N2 and P3 in a Go/No-Go task. Furthermore, we attempt to replicate the previously found internal consistency of the Error-Related Negativity (ERN) and Positive-Error (Pe) in an Eriksen Flanker task. Healthy participants performed a Go/No-Go task and an Eriksen Flanker task, whereby the amplitudes of the correct No-Go N2/P3, and error trials for ERN/Pe were the variables of interest. This study provides evidence that the N2 and P3 in a Go/No-Go task are internally consistent after 20 and 14 trials are included in the average, respectively. Moreover, the ERN and Pe become internally consistent after approximately 8 trials are included in the average. In addition guidelines and suggestions for future research are discussed. |
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