Refreshing boosts memory but does not protect it against interference

Area of Science:

• Cognitive Psychology
• Neuroscience
• Memory Research

Background:

• Focused attention enhances memory retrieval, with repeated attention (refreshing) cumulatively improving recall.
• It remains unclear if refreshing working memory representations also increases their resistance to interference.

Purpose of the Study:

• To investigate whether refreshing memory representations enhances their robustness against interference.
• To determine if the protective effect of refreshing against interference changes with the frequency of refreshing.

Main Methods:

• Participants memorized colors and were instructed to refresh some items multiple times during a retention interval.
• An auditory or visual interruption task was introduced to assess interference effects.
• Memory performance was evaluated using a continuous reproduction test under varying refreshing frequencies and interruption conditions.

Main Results:

• Memory performance was negatively impacted by the interruption task in both experiments.
• Increasing the frequency of refreshing improved memory performance.
• There was no interaction between refreshing frequency and the interruption task, indicating no reduced interference from refreshing.

Conclusions:

• Refreshing strengthens memory representations, leading to better recall.
• Refreshing does not confer increased protection against interference from subsequent tasks.
• Working memory accessibility is improved by refreshing, but not its resilience to disruption.