The Library
A computational model of hippocampal function in trace conditioning
Tools
Ludvig, Elliot Andrew, Sutton, Richard S., Verbeek, Eric and Kehoe, E. James (2008) A computational model of hippocampal function in trace conditioning. In: Twenty-Second Annual Conference on Neural Information Processing Systems, Vancouver, Canada, 8-11 Dec 2008. Published in: Advances in Neural Information Processing Systems 21 ISBN 9781605609492.
Research output not available from this repository.
Request-a-Copy directly from author or use local Library Get it For Me service.
Official URL: http://nips.cc/Conferences/2008/Program/event.php?...
Abstract
We present a new reinforcement-learning model for the role of the hippocampus in classical conditioning, focusing on the differences between trace and delay conditioning. In the model, all stimuli are represented both as unindividuated wholes and as a series of temporal elements with varying delays. These two stimulus representations interact, producing different patterns of learning in trace and delay conditioning. The model proposes that hippocampal lesions eliminate long-latency temporal elements, but preserve short-latency temporal elements. For trace conditioning, with no contiguity between stimulus and reward, these long-latency temporal elements are vital to learning adaptively timed responses. For delay conditioning, in contrast, the continued presence of the stimulus supports conditioned responding, and the short-latency elements suppress responding early in the stimulus. In accord with the empirical data, simulated hippocampal damage impairs trace conditioning, but not delay conditioning, at medium-length intervals. With longer intervals, learning is impaired in both procedures, and, with shorter intervals, in neither. In addition, the model makes novel predictions about the response topography with extended stimuli or post-training lesions. These results demonstrate how temporal contiguity, as in delay conditioning, changes the timing problem faced by animals, rendering it both easier and less susceptible to disruption by hippocampal lesions.
Item Type: | Conference Item (Poster) |
---|---|
Subjects: | B Philosophy. Psychology. Religion > BF Psychology |
Divisions: | Faculty of Science, Engineering and Medicine > Science > Psychology |
Library of Congress Subject Headings (LCSH): | Conditioned response, Hippocampus (Brain) -- Physiology, Reinforcement learning -- Computer simulation |
Journal or Publication Title: | Advances in Neural Information Processing Systems 21 |
Publisher: | Curran Associates, Inc. |
ISBN: | 9781605609492 |
Official Date: | 2008 |
Status: | Not Peer Reviewed |
Access rights to Published version: | Restricted or Subscription Access |
Conference Paper Type: | Poster |
Title of Event: | Twenty-Second Annual Conference on Neural Information Processing Systems |
Type of Event: | Conference |
Location of Event: | Vancouver, Canada |
Date(s) of Event: | 8-11 Dec 2008 |
Related URLs: |
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |