Fig 11. Results of training and testing with mammograms with or without calcifications.

A) Training quickly led to high levels of accuracy. B) The pigeons were able to generalize to novel images, but their performance on this task was not as good as their generalization to novel histology images (Fig 7), although still above chance levels of responding. The trend observed on Day 1 of testing (left) continued throughout the remainder of testing (right).