Susceptibility to Feature Integration in the Simon Task Depends on Working Memory Capacity

[Speaker] Kim, Bia:1
[Co-author] Lee, Donghoon:1, Sohn, Myeong-ho:2
1:Pusan National University, Psychology (Korea(Republic of Korea)), 2:George Washington University, Psychology (Korea(Republic of Korea))

The sequential modulation of a congruence effect has been interpreted as evidence for increased top-down control for efficient selection of task-relevant information. An alternative explanation suggests that this modulation is due to bottom-up feature integration, the notion that complete repetition or alternation of features across trials results in better performance than partial repetition. We examined the effect of working memory capacity (WMC) on different types of stimulus-response binding. We found that an increase in WMC was correlated with a decrease in the Simon effect of the partial repetition trials. However, the Simon effects of complete repetition and alternation did not differ as a function of WMC. In combination, these findings suggest that the sequential Simon effect is subject to both feature integration and top-down control and that WMC is not related to the susceptibility to feature integration, but is related to the exertion of top-down control.
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