Key points are not available for this paper at this time.
Pigeons learned to discriminate pictures of trees, bodies of water, or a particular person in three separate experiments. Pictures being seen for the first time were discriminated almost as well as pictures seen in training. The pigeons in each experiment showed similar patterns of errors and correct discrimination.
Herrnstein et al. (Thu,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: