|Adams' P-validity in the Research on Human Reasoning|
Gernot D Kleiter
The contribution throws a critical light on the application of Adams'
probabilistic validity (p-validity) in the research on human
reasoning. While Adams introduced ``p-validity'' in probability logic as a
surrogate for ``validity'' in classical logic, it has
recently been used in psychology as a ``new standard'' to evaluate
probabilistic inferences. A major misunderstanding concerns the fact
that in the work of Adams the probabilities of the premises are
interval probabilities, while in the psychological experiments the
participants assess point probabilities. The contribution argues that
the coherence approach to probability, that is, the current
continuation and extension of the work of de Finetti, is the more fruitful
approach to evaluate and model human probabilistic inferences.
Received 5 July 2016
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