Counterfactual imagination impairs memory for true actions: EEG and behavioural evidence

Area of Science:

• Cognitive Neuroscience
• Memory Research

Background:

• Imagining events can lead to memory distortions, but the impact of imagining counterfactual past events on existing memories is less understood.
• Understanding how the brain differentiates between true and imagined memories is crucial for memory accuracy.

Purpose of the Study:

• To investigate the neurocognitive processes underlying memory impairment caused by imagining counterfactual past events.
• To examine how the brain distinguishes between veridical and counterfactual imagination during memory retrieval.

Main Methods:

• Electroencephalography (EEG) was used to record brain activity.
• Participants imagined either veridical or counterfactual actions associated with previously performed events.
• Memory recall tests were conducted after imagination tasks.

Main Results:

• Counterfactual imagination significantly reduced memory for performed actions compared to veridical imagination and a baseline condition.
• EEG data revealed distinct neural processes for memory retrieval and post-retrieval effort in distinguishing memory types.
• Evidence suggests counterfactual imagination actively impairs sensorimotor-rich event memories.

Conclusions:

• Counterfactual imagination can actively impair true memories, exceeding simple forgetting.
• Neurocognitive mechanisms are engaged to differentiate between real and imagined events during recall.
• This research provides new insights into memory malleability and the brain's memory discrimination processes.