Turning the Light Switch on Binding: Prefrontal Activity for Binding and Retrieval in Action Control

Area of Science:

• Cognitive Neuroscience
• Neuroscience

Background:

• Action control theories propose that stimulus-response bindings form event files.
• Repeating parts of an event file leads to binding effects, performance costs from partial repetitions.
• Binding effects are typically absent in localization tasks with spatially compatible responses.

Purpose of the Study:

• To investigate if binding effects emerge in localization tasks when responses are translated.
• To examine the role of dorsolateral prefrontal cortex (DLPFC) in modulating binding effects.
• To determine if DLPFC activity correlates with the need for executive control in response translation.

Main Methods:

• Participants localized targets using either direct (spatially compatible) or translated (spatially incompatible) responses.
• Dorsolateral prefrontal cortex (DLPFC) activity was measured using functional near-infrared spectroscopy (fNIRS).
• Behavioral data on response times and accuracy were analyzed for binding effects.

Main Results:

• Binding effects were observed in the translated response condition, but not in the direct response condition.
• DLPFC activity was significantly higher in the translated response condition compared to the direct response condition.
• A correlation was found between the magnitude of binding effects and DLPFC activity.

Conclusions:

• Binding effects can emerge in localization tasks when location features require translation into response features.
• Dorsolateral prefrontal cortex (DLPFC) activity reflects the executive control needed for response translation.
• Binding effects appear to be contingent on the recruitment of DLPFC and executive control demands.