Title |
Learning and Generalization under Ambiguity: An fMRI Study
|
---|---|
Published in |
PLoS Computational Biology, January 2012
|
DOI | 10.1371/journal.pcbi.1002346 |
Pubmed ID | |
Authors |
J. R. Chumbley, G. Flandin, D. R. Bach, J. Daunizeau, E. Fehr, R. J. Dolan, K. J. Friston |
Abstract |
Adaptive behavior often exploits generalizations from past experience by applying them judiciously in new situations. This requires a means of quantifying the relative importance of prior experience and current information, so they can be balanced optimally. In this study, we ask whether the brain generalizes in an optimal way. Specifically, we used Bayesian learning theory and fMRI to test whether neuronal responses reflect context-sensitive changes in ambiguity or uncertainty about experience-dependent beliefs. We found that the hippocampus expresses clear ambiguity-dependent responses that are associated with an augmented rate of learning. These findings suggest candidate neuronal systems that may be involved in aberrations of generalization, such as over-confidence. |
X Demographics
Geographical breakdown
Country | Count | As % |
---|---|---|
Japan | 1 | 14% |
Unknown | 6 | 86% |
Demographic breakdown
Type | Count | As % |
---|---|---|
Members of the public | 4 | 57% |
Scientists | 2 | 29% |
Science communicators (journalists, bloggers, editors) | 1 | 14% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
United Kingdom | 4 | 3% |
France | 4 | 3% |
United States | 2 | 1% |
Japan | 2 | 1% |
Netherlands | 1 | <1% |
Italy | 1 | <1% |
Belgium | 1 | <1% |
Germany | 1 | <1% |
Switzerland | 1 | <1% |
Other | 1 | <1% |
Unknown | 124 | 87% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Student > Ph. D. Student | 34 | 24% |
Researcher | 28 | 20% |
Student > Master | 14 | 10% |
Student > Bachelor | 12 | 8% |
Student > Doctoral Student | 10 | 7% |
Other | 35 | 25% |
Unknown | 9 | 6% |
Readers by discipline | Count | As % |
---|---|---|
Psychology | 42 | 30% |
Neuroscience | 28 | 20% |
Agricultural and Biological Sciences | 18 | 13% |
Computer Science | 9 | 6% |
Social Sciences | 7 | 5% |
Other | 24 | 17% |
Unknown | 14 | 10% |