ABSTRACT
An effective procedure would go something as indicated by Wittrock--that is: Eliminate two labels on the basis of the first answer, then, on the basis of the second answer, eliminate one of the two remaining labels. The second task involves responding to a matching problem on the basis of the given concept. In this case, the effective responses involve picking an appropriate picture and the effective stimulus consists simply of the display. A procedure for solving such tasks might be: Encode the top picture, check the left one; if the concepts match, pick the left picture; otherwise pick the other picture. The replacement strategy group had to devise an effective procedure for eliminating concepts on their own. At the time Wittrock made his comments, the "model" said nothing about how rules are learned. It only provided a way of accounting for behavior of which a subject is capable at any given point in his learning.
