Conditional Reasoning, Representation, and Empirical Evidence on a Concrete Task

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Abstract
This study examined interactions between empirical data, internal representations, and reasoning performance on a conditional reasoning task using a concrete apparatus. Subjects were asked an initial series of questions in order to determine the pattern of inferences they made after simple exposure to the apparatus. They were subsequently shown two different experimental manipulations designed to provide data about the internal structure of the apparatus without giving information about specific inferences. Some subjects did change their reasoning in response to the new data, although most remained stable throughout the experiment. These results are consistent with the idea that reasoning may require generation of an internal representation of a problem space. It was also concluded that the relation between reasoning and empirical evidence cannot be understood without supposing that evidence is often interpreted by subjects according to their reasoning patterns.