Methoden vergelijken

	Multi-groep Inhoudsvaliditeit	Delphi Methode
Vakgebied	Psychometrie	Kwalitatief
Familie	Latent structure	Process / pipeline
Jaar van ontstaan	1986–2006	1963
Grondlegger	Lynn (1986); extended by Polit & Beck (2006)	Norman Dalkey & Olaf Helmer (RAND Corporation)
Type	Validity assessment / expert judgment aggregation	Structured iterative expert-elicitation process
Oorspronkelijke bron	Polit, D. F. & Beck, C. T. (2006). The content validity index: Are you sure you know what's being reported? Critique and recommendations. Research in Nursing & Health, 29(5), 489–497.	Dalkey, N. & Helmer, O. (1963). An Experimental Application of the Delphi Method to the Use of Experts. Management Science, 9(3), 458-467.
Aliassen	multi-group CVI, cross-group content validity, subgroup content validity index, multi-panel content validity	Delphi Yöntemi, Delphi technique, expert consensus method
Verwant	4	5
Samenvatting	Multi-group content validity extends the standard content validity index (CVI) procedure by computing and comparing item- and scale-level validity indices across two or more distinct expert panels or subgroups. It ensures that a scale's items are judged as relevant and representative not only overall but also within each subgroup of interest, supporting cross-group generalizability of the instrument.	The Delphi method is a structured, iterative survey technique developed by Norman Dalkey and Olaf Helmer at the RAND Corporation in 1963 for eliciting and converging expert opinion on complex topics where empirical data are unavailable or insufficient. It collects independent judgements from a geographically dispersed expert panel over multiple anonymous rounds, feeding aggregated results back to participants after each round so they can revise their views in light of the group's collective position.