...agents.
Preparation of this article was supported in part by Northwestern University's School of Education and Social Policy, and by Andersen Consulting through Northwestern's Institute for the Learning Sciences.

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...humans.
While the computer did better in these studies than did the human actor, we prefer to use this simply as a guide to assessing the difficulty of the task rather than for making broad generalizations. See below.
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Clark Elliott
Mon Feb 3 13:01:28 EST 1997