Masters Thesis

The effect of level of training on extradimensional shift learning in the rat: a subproblem analysis.

Since the beginning of the continuity-noncontinuity controversy involving Lashley (1929) and Spence {1936, 1937) , a variety of studies have been conducted which de not uniformly support either of the positions. Although contemporary theories of discrimination learning have been significantly modified from the original formulations fundamental disagreement still exists. For this reason, a brief historical summary would be useful. The noncontinuity theorists, e.g., Lashley (1929) and Krechevsky (1932), asserted that animals solving a discrimination problem seem to be trying one hypothesis and then another until the solution is found. Thus, these theorists held that discrimination learning is a problem- solving process. Learning is discontinuous in that practice prior to solution is unrelated to the strength of the association that is eventually formed. The implication is that animals engage in insightful behavior (Riley, 1968).

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