Towards a dynamical view of ACT-R's electrophysiological correlates

Abstract

Cognitive neuroscience could benefit from more detailed theories about how different cognitive resources interact and how those interactions unfold over time. Cognitive architectures such as ACT-R make predictions about such interactions. Previous work has shown that the activation of ACT-R modules (i.e., cognitive resources) is correlated with oscillatory activity, primarily in the lower frequency bands. Activation of its visual, production, and retrieval modules is primarily associated with oscillations in occipital areas, while the activation of its imaginal module is primarily associated with oscillatory activity in the fronto-parietal attention network. What remained unclear in previous work was the time courses of these oscillatory correlates of ACT-R and what their role is in information processing. Here I show by examining the changes in these oscillatory correlates over time that the occipital effect associated with visual, production, and retrieval modules is primarily related to stimulus identification, and the fronto-parietal correlate associated with the imaginal module is primarily associated with target consolidation. In addition, I demonstrate how patterns of coherence between electrodes could be interpreted as information transfer between the relevant ACT-R modules.\


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