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Protecting Against Evaluation Overfitting in Empirical Reinforcement Learning.
Shimon
Whiteson, Brian Tanner, Matthew
E. Taylor, and Peter Stone.
In IEEE Symposium on Adaptive Dynamic
Programming and Reinforcement Learning (ADPRL), April 2011.
2011
IEEE Symposium on Adaptive Dynamic Programming and Reinforcement Learning (ADPRL)
Empirical evaluations play an important role in machine learning. However, the usefulness of any evaluation depends on the empirical methodology employed. Designing good empirical methodologies is difficult in part because agents can overfit test evaluations and thereby obtain misleadingly high scores. We argue that reinforcement learning is particularly vulnerable to environment overfitting and propose as a remedy generalized methodologies, in which evaluations are based on multiple environments sampled from a distribution. In addition, we consider how to summarize performance when scores from different environments may not have commensurate values. Finally, we present proof-of-concept results demonstrating how these methodologies can validate an intuitively useful range-adaptive tile coding method.
@InProceedings{ADPRL11-shimon,
author="Shimon Whiteson and Brian Tanner and Matthew E.\ Taylor and Peter Stone",
title="Protecting Against Evaluation Overfitting in Empirical Reinforcement Learning",
booktitle="{IEEE} Symposium on Adaptive Dynamic Programming and Reinforcement Learning (ADPRL)",
month="April",
year="2011",
abstract={Empirical evaluations play an important role in machine learning. However, the usefulness of any evaluation depends on the \emph{empirical methodology} employed. Designing good empirical methodologies is difficult in part because agents can \emph{overfit} test evaluations and thereby obtain misleadingly high scores. We argue that reinforcement learning is particularly vulnerable to \emph{environment overfitting} and propose as a remedy \emph{generalized methodologies}, in which evaluations are based on multiple environments sampled from a distribution. In addition, we consider how to summarize performance when scores from different environments may not have commensurate values. Finally, we present proof-of-concept results demonstrating how these methodologies can validate an intuitively useful range-adaptive tile coding method.},
wwwnote={<a href="http://www.ieee-ssci.org/2011/adprl-2011">2011 IEEE Symposium on Adaptive Dynamic Programming and Reinforcement Learning (ADPRL)</a>},
}
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