Free-recall benefit, inhomogeneity and between-item interference in working memory

Area of Science:

• Cognitive Psychology
• Neuroscience
• Human Memory Research

Background:

• Visual working memory (VWM) is crucial for cognitive tasks.
• Understanding VWM requires examining factors like precision and interference.
• Previous research has largely neglected the comparison between free and forced recall strategies.

Purpose of the Study:

• To investigate the impact of recall order on VWM performance.
• To explore inhomogeneity and between-item interference in VWM.
• To analyze the relationship between recall strategy and memory precision.

Main Methods:

• A whole-report task comparing self-paced free recall with computer-dictated forced recall.
• Introduction of an item-selection stage with mouse trajectory recording.
• Analysis of recall order, item precision, localization time, and interference patterns.

Main Results:

• A significant free-recall benefit was observed, with higher overall precision in free recall.
• Free recall led to faster target localization and reduced interference during item selection.
• Evidence for inhomogeneity in VWM precision was found and linked to recall benefits.

Conclusions:

• Free recall enhances visual working memory performance compared to forced recall.
• Reduced between-item interference and improved precision are key benefits of free recall.
• Inhomogeneity in VWM is related to the advantages observed in free recall strategies.