Gerd Gigerenzer is the author you want for looking at overfit in human beings. Sworn life enemy of the Kahneman and Tversky collaboration, and vice versa(Kahneman actually put in a few disses in his Nobel prize ceremony aimed pretty much at him...).

No, that results in false classification.

This is saying that overtraining prevents revision of existing skills, as if the learning process is interrupted.

More like learning rate decay. Learning rate is now zero.

Not really. With over-fitting, performance goes down, not just plateaues.