Description - Who is Rational? by Keith E. Stanovich
Integrating a decade-long programme of empirical research with cognitive theory, this work demonstrates that psychological research has profound implications for debates about what it means to be rational. The author brings new evidence to bear on these issues by demonstrating that patterns of individual differences - largely ignored in disputes about human rationality - have strong implications for explanations of the gap between normative and descriptive models of human behaviour. Separate chapters demonstrate how patterns of individual differences have implications for all of the major critiques of purported demonstrations of human irrationality in the heuristics and biases literature. In these critiques, it has been posited that experimenters have observed performance errors rather than systematically irrational responses; the tasks have required computational operations that exceed human cognitive capacity; experimenters have applied the wrong normative model to the task; and participants have misinterpreted the tasks.
In a comprehensive set of studies, Stanovich demonstrates that gaps between normative and descriptive models of performance on some tasks can be accounted for by positing these alternative explanations, but that not all discrepancies from normative models can be so explained. Individual differences in rational thought can in part be predicted by psychological dispositions that are interpreted as characteristic biases in people's intentional-level psychologies. Experiments and theoretical insights in this volume contextualize the heuristics and biases literature exemplified in the work of various investigators.
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