chapter  3
18 Pages

Learning and Memory in Machines and Animals: An AI Model that Accounts for Some Neurobiological Data

However, H. M. can acquire certain categories of new abilities. For instance, he has been tested on the mirror-writing task of writing while seeing only a mirror image of what he writes. Every time the experimenter came in the room, once a day for several weeks, H. M. had to be reintroduced to both the experimenter and the experiment and insisted that he had of course never seen either before and that he didn't know how to do this (mirror-writing) task. Yet his performance on the task improved steadily over the several-week period; in fact, he learned the task at about the same rate that control subjects did. When confronted with examples of his poor early trials compared with his much improved recent trials, he is unable to explain the differences and doesn't remember ever performing those experiments.