NDLI: Causal Model Comparison Shows That Human Representation Learning Is Not Bayesian.

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Causal Model Comparison Shows That Human Representation Learning Is Not Bayesian.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Geana, Andra Niv, Yael
Description	Author Affiliation: Geana A ( Psychology Department, Princeton University, Princeton, New Jersey 08540 ageana@princeton.edu yael@princeton.edu.); Niv Y ( Psychology Department, Princeton University, Princeton, New Jersey 08540 Princeton Neuroscience Institute, Princeton University, Princeton, New Jersey 08540 ageana@princeton.edu yael@princeton.edu.)
Abstract	How do we learn what features of our multidimensional environment are relevant in a given task? To study the computational process underlying this type of 'representation learning,' we propose a novel method of causal model comparison. Participants played a probabilistic learning task that required them to identify one relevant feature among several irrelevant ones. To compare between two models of this learning process, we ran each model alongside the participant during task performance, making predictions regarding the values underlying the participant's choices in real time. To test the validity of each model's predictions, we used the predicted values to try to perturb the participant's learning process: We crafted stimuli to either facilitate or hinder comparison between the most highly valued features. A model whose predictions coincide with the learned values in the participant's mind is expected to be effective in perturbing learning in this way, whereas a model whose predictions stray from the true learning process should not. Indeed, we show that in our task a reinforcement-learning model could help or hurt participants' learning, whereas a Bayesian ideal observer model could not. Beyond informing us about the notably suboptimal (but computationally more tractable) substrates of human representation learning, our manipulation suggests a sensitive method for model comparison, which allows us to change the course of people's learning in real time.
File Format	HTM / HTML
ISSN	00917451
e-ISSN	19434456
Journal	Cold Spring Harbor Symposia on Quantitative Biology
Volume Number	79
Language	English
Publisher	Cold Spring Harbor Laboratory Press
Publisher Date	2014-01-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Discipline Biology Models, Neurological Bayes Theorem Photic Stimulation Task Performance And Analysis Comparative Study Research Support, N.i.h., Extramural Research Support, U.s. Gov't, Non-p.h.s.
Content Type	Text
Resource Type	Article
Subject	Genetics Biochemistry Molecular Biology

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