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Stimulus congruency and response compatibility effects on posterior theta in the Eriksen task
Serban, Cristian Alexandru (2025) Stimulus congruency and response compatibility effects on posterior theta in the Eriksen task.
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| Abstract: | A central question in cognitive neuroscience is how the brain resolves conflicts between competing visual and motor inputs. From the perspective of the Affordance Competition Hypothesis, action-relevant stimuli simultaneously activate multiple motor plans that must be filtered and selected based on task demands. In this study, a modified Eriksen Flanker Task was used to shed light on the contributions of stimulus congruency and response compatibility to cognitive control. Behavioural, time-frequency, and topographical EEG analyses focused on posterior theta band (4-8 Hz) activity. Fourteen participants performed a single version of the task while EEG data were recorded from parieto-occipital sites. Reaction time and accuracy data revealed additive costs of visual and motor conflict, with the slowest and least accurate responses observed in incompatible-incongruent trials. EEG results showed increased posterior theta power incompatible-incongruent conditions, especially between 150-250 ms post-stimulus. Our findings suggest that posterior theta reflects integrative mechanism for resolving visual and motor conflict. The results are consistent with a distributed model of cognitive control involving both visual filtering and motor competition. |
| Item Type: | Essay (Bachelor) |
| Faculty: | BMS: Behavioural, Management and Social Sciences |
| Subject: | 77 psychology |
| Programme: | Psychology BSc (56604) |
| Link to this item: | https://purl.utwente.nl/essays/106971 |
| Export this item as: | BibTeX EndNote HTML Citation Reference Manager |
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