Slowing forgetting in visual working memory: Proactive facilitation in the repeated-unique paradigm.

Area of Science:

• Cognitive Psychology
• Neuroscience

Background:

• Proactive interference hinders new memory formation by older memories.
• Prior research suggests proactive interference impacts visual working memory capacity.
• The influence of proactive interference on the temporal decay of visual working memory is less understood.

Purpose of the Study:

• To investigate if proactive interference affects the temporal decay of visual working memory.
• To examine the role of stimulus repetition in proactive interference and memory retention.

Main Methods:

• Six experiments were conducted using a visual working memory task.
• Participants encoded target sets and identified matching probes.
• Retention intervals, intertrial intervals, and target repetition were systematically varied.

Main Results:

• Contrary to hypotheses, temporal forgetting was generally reduced with target repetition.
• Proactive interference did not consistently impair memory retention over time.
• Stimulus repetition appeared to offer protection against time-dependent forgetting.

Conclusions:

• The findings challenge the idea that proactive interference causes memory loss in visual working memory.
• Stimulus repetition may mitigate temporal forgetting, rather than exacerbate it.
• Proactive interference may not be the primary driver of working memory decay over time.