Evaluating Cognitive Action Control Using Eye-Movement Analysis: An Oculomotor Adaptation of the Simon Task

Area of Science:

• Cognitive psychology
• Neuroscience
• Human motor control

Background:

• Cognitive action control is often studied using conflict tasks like the Simon task.
• Recent research applies the dual-route hypothesis and activation-suppression model, using distributional analyses.
• The specificity of cognitive action control assessment across different response modes remains debated.

Purpose of the Study:

• To investigate if conflict resolution in a two-dimensional Simon task using oculomotor responses yields results similar to manual responses.
• To evaluate the applicability of the activation-suppression model to oculomotor response tasks.
• To explore the potential of oculomotor responses for studying cognitive action control in individuals with motor impairments.

Main Methods:

• Adaptation of the Simon task to utilize oculomotor responses instead of manual responses.
• Recruitment of 43 young healthy participants.
• Analysis of reaction times (RT), accuracy, conditional accuracy functions (CAF), and delta plots.

Main Results:

• A significant congruence effect was observed, with longer RTs and lower accuracy in the incongruent condition.
• Conditional accuracy functions indicated a higher proportion of fast errors in the incongruent condition.
• Delta plots confirmed that conflict resolution became easier with increased response time, aligning with the activation-suppression model.

Conclusions:

• Conflict resolution in cognitive action control appears to involve core mechanisms irrespective of the response mode (manual or oculomotor).
• The findings support the activation-suppression model, suggesting automatic activation and the need for inhibitory control over time.
• Oculomotor-based Simon tasks offer a viable alternative for assessing cognitive action control, particularly in patient populations with motor limitations.