Predicting episodic memory formation for movie events [code]

TitlePredicting episodic memory formation for movie events [code]
Publication TypeCode
Year of Publication2016
AuthorsTang, H, Singer, J, Ison, M, Pivazyan, G, Romaine, M, Frias, R, Meller, E, Boulin, A, Carroll, J, Perron, V, Dowcett, S, Arlellano, M, Kreiman, G

Episodic memories are long lasting and full of detail, yet imperfect and malleable. We quantitatively  evaluated recollection of short audiovisual segments from movies as a proxy to real-life memory  formation in 161 subjects at 15  minutes up to a year after encoding. Memories were reproducible within  and across individuals, showed the typical decay with time elapsed between encoding and testing,  were fallible yet accurate, and were insensitive to low-level stimulus manipulations but sensitive to  high-level stimulus properties. Remarkably, memorability was also high for single movie frames, even  one year post-encoding. To evaluate what determines the efficacy of long-term memory formation,  we developed an extensive set of content annotations that included actions, emotional valence, visual  cues and auditory cues. These annotations enabled us to document the content properties that showed  a stronger correlation with recognition memory and to build a machine-learning computational model  that accounted for episodic memory formation in single events for group averages and individual  subjects with an accuracy of up to 80%. These results provide initial steps towards the development of a  quantitative computational theory capable of explaining the subjective filtering steps that lead to how  humans learn and consolidate memories.

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Citation Key2885

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