Dissociations and interactions between attention guidance from negative templates maintained in visual working memory...

Area of Science:

• Cognitive Psychology
• Neuroscience
• Visual Perception

Background:

• Visual attention can be actively guided away from irrelevant items using negative templates.
• These templates, specifying features to avoid, can be stored in visual working memory (VWM) or long-term memory (LTM).
• LTM-based negative templates proactively suppress distractors, but VWM-based templates' proactive implementation remains debated.

Purpose of the Study:

• To directly contrast the mechanisms and interactions of LTM- and VWM-based negative guidance during visual search.
• To determine if VWM-based negative templates are implemented proactively, similar to LTM-based templates.
• To investigate how LTM- and VWM-based negative guidance interact when both are active.

Main Methods:

• A visual search experiment was designed to pit LTM- and VWM-based negative guidance against each other.
• Oculomotor orienting measures, including guidance polarity, latency, and patterns across trials, were analyzed.
• Experimental conditions manipulated the potential overlap and competition between LTM and VWM negative templates.

Main Results:

• LTM- and VWM-based negative guidance dissociated across multiple oculomotor measures, suggesting distinct underlying mechanisms.
• Both LTM and VWM guidance were expressed when they specified different distractor sets.
• When LTM and VWM negative templates competed, VWM-based biases dominated, overshadowing LTM-based guidance.

Conclusions:

• Negative guidance from LTM and VWM is mediated by fundamentally different neural and cognitive mechanisms.
• Online attentional sets (VWM) have priority over learned biases (LTM) in determining attentional priority during visual search.
• Future research should explore the neural correlates differentiating these two forms of attentional control.