Validity Validity =scientific acceptability Two widely accepted, and important, rules of thumb regarding the validityof scientific theories: - the falsifiabilitycriterion - the corroborationcriterion The falsifiabilitycriterion A scientific theory is worth serious consideration onlyif there are conceivableempirical outcomes (i.e., test results) that would count againstit. The idea behind the falsifiability criterion: If a theory is really false, then we want there to be a way of discovering that it’s false. The corroborationcriterion A scientific theory that satisfies the falsifiability criterion is credibleonly to the extent that it has been: - tested - notrefuted The idea behind the corroboration criterion: We want to know how much probabilityto assign to any theory we’re seriously considering.
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