Involuntary top-down control by search-irrelevant features: Visual working memory biases attention in an object-based...

Area of Science:

• Cognitive Psychology
• Neuroscience
• Visual Perception

Background:

• Everyday tasks require repeated visual search with changing targets.
• Visual working memory (VWM) retains targets, influencing attention.
• It's debated if VWM bias affects only search-relevant features or all object features.

Purpose of the Study:

• To investigate if search-irrelevant features stored in VWM bias attention during visual search.
• To determine if VWM templates bias attention in an object-based or feature-specific manner.

Main Methods:

• Participants performed saccadic eye movements to targets.
• A colored cue preceded each search trial, with target identity being relevant and color irrelevant.
• Experiments manipulated target-cue color matches and cue-distractor color relationships.

Main Results:

• Search-irrelevant color matches between cue and target accelerated and increased direct saccades to the target.
• Cue-distractor color matches hindered direct target saccades.
• Distractors with cue-matching colors captured attention even when color was irrelevant and participants were informed.

Conclusions:

• Search-irrelevant features of VWM templates involuntarily bias attention.
• Attention bias is object-based, not solely feature-specific.
• This supports involuntary top-down attentional control mediated by object-based VWM templates.