Class imbalances versus small disjuncts

  title={Class imbalances versus small disjuncts},
  author={Taeho Jo and Nathalie Japkowicz},
  journal={SIGKDD Explorations},
It is often assumed that class imbalances are responsible for significant losses of performance in standard classifiers. The purpose of this paper is to the question whether class imbalances are truly responsible for this degradation or whether it can be explained in some other way. Our experiments suggest that the problem is not directly caused by class imbalances, but rather, that class imbalances may yield small disjuncts which, in turn, will cause degradation. We argue that, in order to… CONTINUE READING
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