Early Stopping - Method

Method

  1. Divide the available data into training and validation sets.
  2. Use a large number of hidden units.
  3. Use very small random initial values.
  4. Use a slow learning rate.
  5. Compute the validation error rate periodically during training.
  6. Stop training when the validation error rate "starts to go up".

It is crucial to realize that the validation error is not a good estimate of the generalization error. One method for getting an unbiased estimate of the generalization error is to run the net on a third set of data, the test set, that is not used at all during the training process. The error on the test set gives estimate on generalization; to have the outputs of the net approximate target values given inputs that are not in the training set.

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