Influence of Time Pressure in a Simple Response Task, a Choice-by-Location Task, and the Simon Task
- 1 October 2001
- journal article
- Published by Hogrefe Publishing Group in Journal of Psychophysiology
- Vol. 15 (4) , 241-255
- https://doi.org/10.1027//0269-8803.15.4.241
Abstract
The influence of strategy was examined for a simple response task, a choice-by-location task, and the Simon task by varying time pressure. Besides reaction time (RT) and accuracy, we measured response force and derived two measures from the event-related EEG potential to form an index for attentional orienting (posterior contralateral negativity: PCN) and the start of motor activation (the lateralized readiness potential: LRP). For the choice-by-location task and the Simon task, effects of time pressure were found on the response-locked LRP, but not on the onset of the PCN and the stimulus-locked LRP. Thus, strategy influences processing after the start of motor activation in choice tasks. A small effect of time pressure was found on the peak latency of the PCN in the Simon task, which suggests that time pressure may affect attentional orienting. In the simple response task, time pressure reduced the amplitude of the PCN. This finding suggests that strategy affects attentional orienting to stimul...Keywords
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