Reinforcement of inhibitory positional priming by spatial working memory contents

Area of Science:

• Cognitive Psychology
• Neuroscience
• Visual Perception

Background:

• Positional priming influences visual search efficiency by guiding attention to previously relevant locations.
• The role of cognitive control, specifically spatial working memory (WM), in modulating these priming effects remains incompletely understood.

Purpose of the Study:

• To investigate whether spatial working memory (WM) modulates positional priming effects in visual pop-out search.
• To determine if top-down influences, mediated by WM, affect facilitatory and inhibitory positional priming differently.

Main Methods:

• Participants performed visual search tasks following the presentation of a memory item.
• Two conditions were compared: a memory condition (search after memory task) and a no-memory condition (search before memory task).
• Stimulus configurations and memory items were manipulated to assess effects on target detection speed and accuracy.

Main Results:

• Positional priming effects were observed, with faster detection at previous target locations and slower detection at previous distractor locations.
• Facilitatory priming remained unaffected by the memory manipulation.
• Inhibitory priming was significantly larger in the memory condition compared to the no-memory condition, particularly when memory stimuli matched search stimuli.

Conclusions:

• Positional priming is not solely a bottom-up process; it is susceptible to top-down influences from spatial working memory.
• Working memory plays a crucial role in enhancing inhibitory aspects of positional priming, demonstrating cognitive control over attentional guidance.