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Adaptation to novelty is viewed as learning to change and augment existing skills to confront unfamiliar situations. In this paper, we propose that the amount of editing of an effective representation (the Representation Edit Distance or RED) used in a set of skill programs in an agent's mental model is a measure of difficulty for adaptation to novelty. The RED is an intuitive approximation to the change in information content in bit strings measured by comparing pre-novelty and post-novelty<span class="external-identifiers"> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/2111.02770v1">arXiv:2111.02770v1</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/4vdwwy3gdja7xdca7aphnpseta">fatcat:4vdwwy3gdja7xdca7aphnpseta</a> </span>
more »... ll programs. We also present some notional examples of how to use RED for predicting difficulty.
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