Bayesian Surprise Predicts Human Event Segmentation in Story Listening
Abstract
Event segmentation theory posits that people segment continuous experience into discrete events and that event boundaries occur when there are large transient increases in prediction error. Here, we set out to test this theory in the context of story listening, by using a deep learning language model (GPT‐2) to compute the predicted probability distribution of the next word, at each point in the story. For three stories, we used the probability distributions generated by GPT‐2 to compute the time series of prediction error. We also asked participants to listen to these stories while marking event boundaries. We used regression models to relate the GPT‐2 measures to the human segmentation data. We found that event boundaries are associated with transient increases in Bayesian surprise but not with a simpler measure of prediction error (surprisal) that tracks, for each word in the story, how strongly that word was predicted at the previous time point. These results support the hypothesis that prediction error serves as a control mechanism governing event segmentation and point to important differences between operational definitions of prediction error.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 01, 2023
- Source ID
- 10.1111/cogs.13343
Entities
People
- Ariel Goldstein
- Jeff Zacks
- Kenneth A. Norman
- Manoj Kumar
- Sebastian Michelmann
- Uri Hasson
Organizations
- Google Research
- Hebrew University of Jerusalem
- National Science Foundation
- Office of Naval Research Global
- Princeton University
- Washington University in St. Louis