Retrieval-related eye movements are predictive of memory precision.

Area of Science:

• Cognitive Neuroscience
• Neuroimaging
• Human Memory

Background:

• Eye movements are linked to memory encoding and retrieval.
• It remains unclear if eye movements reflect the precision of recalled memory content.

Purpose of the Study:

• To investigate the relationship between eye fixations, memory precision, and brain activity (fMRI BOLD).
• To determine if eye movements track the fidelity of retrieved episodic memory.

Main Methods:

• Participants underwent simultaneous fMRI and eye-tracking during a memory retrieval task.
• Memory precision was assessed using a two-component mixture model based on reported locations.
• Eye fixation patterns were analyzed in relation to retrieval success and memory precision.

Main Results:

• Fixations predicted both successful retrieval and the precision of recalled locations.
• Fixation patterns were more similar for successful retrievals and high-precision memories.
• Eye fixation precision and pattern similarity independently predicted memory precision, alongside hippocampal BOLD activity.

Conclusions:

• Eye fixations during memory retrieval reflect the precision and fidelity of mnemonic content.
• Eye movement analysis offers insights into the neural mechanisms of memory recall.
• This study links oculomotor behavior to the quality of episodic memory representations.