手法を比較

	Rank-Order Elicitation	Successive Pile Sorting
分野	Anthropology	Anthropology
系統	Process / pipeline	Process / pipeline
提唱年	1988	1988
提唱者	Cognitive anthropology tradition (Weller & Romney)	Cognitive anthropology tradition (Weller & Romney)
種類	Elicitation procedure for ordering items on a single criterion	Elicitation procedure for hierarchical structure of a cultural domain
原典	Weller, S. C., & Romney, A. K. (1988). Systematic Data Collection. Qualitative Research Methods Series 10. Newbury Park, CA: Sage. ISBN: 9780803930742	Weller, S. C., & Romney, A. K. (1988). Systematic Data Collection. Qualitative Research Methods Series 10. Newbury Park, CA: Sage. ISBN: 9780803930742
別名	Ranking Task, Complete Ranking Elicitation, Ordinal Ranking Task, Rank Aggregation	Hierarchical Pile Sort, Successive Sorting Task, Multi-Level Pile Sort, Successive Free Pile Sort
関連	4	4
概要	Rank-order elicitation asks each informant to place a set of items into a complete order on a single criterion — from most to least important, severe, preferred, or typical — so that the whole domain is captured in one ordinal judgment per person. Unlike paired comparison, which gathers many local two-item choices, ranking obtains the global order directly, trading some redundancy for speed. Aggregating the individual rankings produces a group ordering, while a concordance statistic measures how strongly the informants agree.	Successive pile sorting is an extension of the single-level pile sort in which informants first divide a set of items into a few broad piles and then repeatedly subdivide each pile into finer groupings (or, in the lumping variant, repeatedly merge piles into coarser ones). Recording the level at which any two items first become separated yields a graded similarity measure that captures the hierarchical structure of a cultural domain, not just a single flat partition.