Comparison of event-related potentials and reaction time in Stroop task with and without inhibition of response

[Speaker] Marakshina, Julia A:1
[Co-author] Bespalov, Boris I:1, Vartanov, Alexander V:1, Kiselnikov, Andrey A:1, Kozlovskiy, Stanislav A:1
1:Lomonosov Moscow State University (Russia)

The Russian words 'red' and 'green' written in red or green font were used in two Stroop tasks. The subjects (N=26) had to press right or left button as response to presentation of words written in red or green font, respectively (task 1). The same subjects inhibited response to the word 'red' and responded only to the word 'green' (task 2). Mean RT to the word 'green' was at 41 ms greater (p<0.001) in task 2 comparing to task 1. It was accompanied by differences between ERPs in the lead F3 (latency 250-450 ms) for the words 'green' and 'red', despite the fact that in task 2 the response to word 'red' was not allowed. Stroop effect (14 ms) in task 2 was accompanied by a difference in ERPs after 450 ms. The study was supported by RFBR project 13-06-00553.
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