Delineating resetting and updating in visual working memory based on the object-to-representation correspondence

Area of Science:

• Cognitive Neuroscience
• Psychology
• Neuroscience

Background:

• Visual working memory (VWM) maintains object representations.
• VWM can modify existing representations (updating) or create new ones (resetting).

Purpose of the Study:

• To determine if object-to-representation mapping availability dictates VWM updating versus resetting.
• To investigate the dynamic processes underlying VWM changes.

Main Methods:

• Comparing object separation scenarios with stable vs. lost object-to-representation mappings.
• Measuring contralateral delay activity (CDA) amplitude as an electrophysiological marker of VWM contents.
• Assessing behavioral costs in detecting changes during VWM processes.

Main Results:

• Loss of object-to-representation mapping triggered VWM resetting, indicated by a drop in CDA amplitude and behavioral costs.
• Stable mapping allowed VWM updating, shown by a rise in CDA amplitude and reduced behavioral costs.
• Both updating and resetting yielded representations of post-change objects, but via distinct dynamic pathways.

Conclusions:

• The availability of object-to-representation correspondence is the critical factor determining VWM updating or resetting.
• This study reveals the online dynamics and triggering conditions for VWM updating and resetting.
• Object-to-representation mapping is crucial for VWM's ability to modify or reset representations.