There is a distinction that one learns about on the first day of a course in psychological research methods. It is the difference between internal and external validity. Internal validity is ...

This project investigates the criterion and structural validity of the recent published abbreviated version of the Conformity to Masculine Norms Inventory (Mahalik et al., 2003, Levant et al., 2020).

An examination of nearly 350 published psychological experiments found that nearly half failed to show that they were based on a valid foundation of empirical evidence, suggesting that a wide swath of ...

A group of more than 30 academics and researchers in psychiatry and psychopharmacology is challenging the conclusions of an umbrella review published last year that concluded there is no convincing ...