手法を比較

	構造化合意形成手法としてのナショナル・グループ・テクニック（NGT）	構造化面接
分野	質的手法	調査方法論
系統	Process / pipeline	Process / pipeline
提唱年	1971	1940s–1950s
提唱者	André L. Delbecq and Andrew H. Van de Ven	Survey research tradition; formalized by Campbell, Katona, and Kahn in mid-20th century
種類	Qualitative research method	Quantitative / mixed data collection technique
原典	Delbecq, A. L., & Van de Ven, A. H. (1971). A group process model for problem identification and program planning. Journal of Applied Behavioral Science, 7(4), 466–492.	Fontana, A., & Frey, J. H. (2000). The interview: From structured questions to negotiated text. In N. K. Denzin & Y. S. Lincoln (Eds.), Handbook of Qualitative Research (2nd ed., pp. 645–672). Sage.
別名	NGT, structured group process, nominal group process, priority-setting group method	standardized interview, formal interview, schedule-based interview, fixed-format interview
関連	6	4
概要	The Nominal Group Technique (NGT) is a structured group facilitation method designed to generate and prioritise ideas, problems, or solutions while ensuring equal participation from all members. Developed by Delbecq and Van de Ven in 1971, it combines silent individual idea generation with structured group discussion and systematic voting to produce a ranked list of priorities. Unlike unstructured focus groups, NGT prevents dominant voices from suppressing quieter participants, making it especially valuable for needs assessment, program planning, and stakeholder priority-setting in applied research and policy contexts.	A structured interview is a data collection technique in which every participant is asked exactly the same pre-specified questions in the same order, using standardized wording. Because the interview schedule is fixed, responses across participants are directly comparable, enabling quantitative aggregation and statistical analysis. It sits at the most standardized end of the interview continuum, between the self-administered questionnaire and the semi-structured interview.