Technical Program

Paper Detail

Paper: PS-2A.43
Session: Poster Session 2A
Location: H Lichthof
Session Time: Sunday, September 15, 17:15 - 20:15
Presentation Time:Sunday, September 15, 17:15 - 20:15
Presentation: Poster
Publication: 2019 Conference on Cognitive Computational Neuroscience, 13-16 September 2019, Berlin, Germany
Paper Title: Eye Movements Reflect Causal Inference During Episodic Memory Retrieval
Manuscript:  Click here to view manuscript
License: Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 Unported License.
Authors: Yul HR Kang, Cambridge University, United Kingdom; Johannes Mahr, Central European University, Hungary; Márton Nagy, Krisztina Andrási, Eötvös Loránd Universiy, Hungary; Gergely Csibra, Central European University, Hungary; Máté Lengyel, Cambridge University, Hungary
Abstract: During episodic memory retrieval, eye movements tend to distinguish between studied and unstudied items, a tendency known as "retrieval-dependent eye movements" (RDEs). However, what cognitive processes drive RDEs, and especially whether they are different from those that drive explicit choices, remains unknown. Here we dissect the cognitive processes underlying RDEs by model-based analyses of a false memory paradigm. Participants first memorized object-location pairs on a circular array ("learning"). They then saw object-location pairings allegedly produced by another participant in the upcoming memory test, and judged their correctness ("suggestion"). Finally, participants indicated the location of each object themselves ("retrieval"). A Bayesian cue-combination model that performed causal inference to assess whether the noisy memories of the learned and suggested object-location pairs (the two "cues") were from the same sources, and combined the memories accordingly, fit participants' explicit responses well. We also found that eye movements reflected the learned and the suggested stimulus even after controlling for the effects of explicit responses. Thus, RDEs contain information beyond that present in explicit responses, and they reflect the dynamics of the causal inference process underlying memory retrieval.