Stimulus familiarity improves consolidation of visual working memory representations

Area of Science:

• Cognitive Psychology
• Neuroscience
• Visual Perception

Background:

• Short-term consolidation stabilizes visual working memory (VWM) representations against interference.
• Understanding factors that enhance VWM consolidation is crucial for cognitive enhancement.

Purpose of the Study:

• To investigate if training on specific shapes facilitates the consolidation of visual representations in VWM.
• To determine if training effects transfer to novel stimuli and are independent of verbal labeling.

Main Methods:

• Three experiments employed a backward masking paradigm to assess VWM.
• Training involved either a four-alternative forced choice task or a change-detection task.
• Performance on trained versus novel visual stimuli was compared.

Main Results:

• Experiment 1 showed an advantage for trained shapes and faster consolidation, not attributable to verbal labeling (Experiment 3).
• Experiment 2 revealed no overall training benefit but demonstrated transfer to novel shapes.
• The type of training task modulated the impact of long-term representations on VWM.

Conclusions:

• Long-term visual representations can indeed facilitate VWM processing.
• The effectiveness of training depends significantly on the specific training task employed.
• This highlights the plasticity of VWM and the influence of prior knowledge on memory consolidation.