השוואת שיטות

	Triad Test	מיפוי רב-ממדי (MDS)
תחום	Anthropology	סטטיסטיקה
משפחה	Process / pipeline	Latent structure
שנת המקור	1988	1952–1964
הוגה השיטה	Cognitive anthropology tradition (Weller & Romney; Borgatti)	Warren S. Torgerson (metric MDS, 1952); Joseph B. Kruskal (non-metric MDS, 1964)
סוג	Elicitation procedure for fine-grained perceived similarity	Dimensionality reduction / visualization
מקור מכונן	Weller, S. C., & Romney, A. K. (1988). Systematic Data Collection. Qualitative Research Methods Series 10. Newbury Park, CA: Sage. ISBN: 9780803930742	Kruskal, J. B. (1964). Multidimensional scaling by optimizing goodness of fit to a nonmetric hypothesis. Psychometrika, 29(1), 1–27.
כינויים	Triadic Comparison, Triads Task, Method of Triads, Triad Sorting	MDS, metric MDS, non-metric MDS, proximity scaling
קשורות	4	5
תקציר	The triad test is an elicitation technique for measuring perceived similarity among the items of a cultural domain. Informants are shown items three at a time and asked to pick the one that is most different (or, equivalently, which two are most alike). Across many triads and many informants, the pattern of which items are repeatedly kept together yields a fine-grained similarity matrix that is analyzed with multidimensional scaling and clustering.	Multidimensional scaling maps objects described only by pairwise similarities or dissimilarities into a low-dimensional geometric space so that distances in that space reflect the original proximity structure as faithfully as possible. It is widely used to visualize the hidden structure of psychological, social, and behavioral data.