D-Ed Reckoning: Downes responds

Kirshner argues, very clearly, that non-instructivist methods result in no better learning than direct instruction, and sometimes in *less* learning, because of the 'cognitive overhead' required in self-directed methodologies.

Kirshner's argument on this point is not based on experimental data, but rather, on his theory of cognition. Specifically, he argues that short-term memory has a limited capacity, and that if some of this capacity is not available for new facts (because it is taken up 'selecting scientific principles') then the transfer of information to the student is reduced.

I respond to this argument by showing how Kirshner's theory is false. We do not 'retrieve theories' into short term memory and then 'select' from them. That is not how thinking works; that is not ow scientific thinking works. And therefore, Kirshner's argument, on these grounds, against student-directed learning, fails.

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The best mechanism for demonstrating knowledge is not likely the production of a certain set of facts on demand. Expertise in a discipline on the part of a student is something that is typically *recognized*, not measured, by people who are already experts in the field.

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