So sánh phương pháp

	Độ tin cậy nội dung đa nhóm	Phương pháp Delphi
Lĩnh vực	Trắc lượng tâm lý	Định tính
Họ	Latent structure	Process / pipeline
Năm ra đời	1986–2006	1963
Người khởi xướng	Lynn (1986); extended by Polit & Beck (2006)	Norman Dalkey & Olaf Helmer (RAND Corporation)
Loại	Validity assessment / expert judgment aggregation	Structured iterative expert-elicitation process
Công trình gốc	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.
Tên gọi khác	multi-group CVI, cross-group content validity, subgroup content validity index, multi-panel content validity	Delphi Yöntemi, Delphi technique, expert consensus method
Liên quan	4	5
Tóm tắt	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.