As mentioned in the previous chapter, one of the main disadvantages observed during the training of large neural networks is overfitting, that is, generating very good approximations for the training data but emitting noise for the zones between single points. There are a couple of ways to reduce or even prevent this issue, such as dropout, early stop, and limiting the number of parameters.
In the case of overfitting, the model is specifically adjusted to the training dataset, so it will not be used for generalization. Therefore, although it performs well on the training set, its performance on the test dataset and subsequent tests is poor because it lacks the generalization property:
Figure ...
