Sequential dependencies in the Eriksen flanker task: A direct comparison of two competing accounts |
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Authors: | Eddy J Davelaar Jennifer Stevens |
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Institution: | (1) Department of Psychology, University of Oregon, Eugene, OR 97403-1227, USA |
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Abstract: | In the conflict/control loop theory proposed by Botvinick, Braver, Barch, Carter, and Cohen (2001), conflict monitored in
a trial leads to an increase in cognitive control on the subsequent trial. The critical data pattern supporting this assertion
is the so-called Gratton effect—the decrease in flanker interference following incongruent trials—which was initially observed in the Eriksen flanker task.
Recently, however, the validity of the idea that this pattern supports a general conflict/control mechanism has been questioned
on the grounds that the Gratton effect is only observed with stimulus repetition. We present an experiment testing whether
the Gratton effect reflects a stimulus-independent increase in cognitive control or stimulus-specific repetition priming.
Although our results support the latter hypothesis, the priming effect is modulated by the congruency of the previous trial.
We discuss a new mechanism through which monitored conflict is used to exert executive control by modulating stimulus-response
associations. |
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Keywords: | |
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