Jörg Wittkewitz serves as an expert/reviewer on behalf of international foundations and research institutions (Good Research Practice / Grant Assessment), including with regard to QRP/QMP and improper or harmful practices in research (forensic metascience).
Jörg Wittkewitz ist Gutachter für empirische Methoden / gute wissenschaftliche Praxis im Auftrag von international tätigen Stiftungen und Forschungsinstitutionen (Good Research Practice / Grant Assessment) auch mit Bezug auf QRP/QMP bzw. unsachgemäße oder schädliche Praktiken in der Forschung (forensic metascience).
If you are unfamiliar with Questionable Measurement Practice (QMP), please watch these talks online on youtube 2020 by Jessica Flake (65min) as a primer and/or this 2026 APA Workshop by Eiko Fried (90min), which builds on the well-documented example of measuring depression with the most common depression scales, which only share 40% of their content.
In terms of the validities in (quasi-)experiments and other basic stuff you may find a good primer in the textbook Experimental and quasi‐experimental designs for generalized causal inference by Shadish, Cook, and Campbell (2001) and its two prequels from 1966 (Campbell & Stanley) and 1979 (Cook & Campbell).
Whether a principle is sound—tends to facilitate approaching an epistemic aim—is an empirical question, answerable only by history of science.
Paul E. Meehl, 1992