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| Analisi Fattoriale× | Clustering gerarchico× | |
|---|---|---|
| Campo≠ | Statistica per la ricerca | Apprendimento automatico |
| Famiglia≠ | Process / pipeline | Machine learning |
| Anno di origine≠ | 1931 | 1963 |
| Ideatore≠ | Louis Leon Thurstone | Ward, J. H. |
| Tipo≠ | Method | Unsupervised clustering (agglomerative) |
| Fonte seminale≠ | Thurstone, L. L. (1947). Multiple Factor Analysis. University of Chicago Press. DOI ↗ | Ward, J. H. (1963). Hierarchical Grouping to Optimize an Objective Function. Journal of the American Statistical Association, 58(301), 236–244. DOI ↗ |
| Alias≠ | EFA, CFA, latent variable modeling | Hiyerarşik Kümeleme, hiyerarşik kümeleme, agglomerative clustering, hierarchical agglomerative clustering |
| Correlati≠ | 3 | 4 |
| Sintesi≠ | Factor analysis is a statistical technique for identifying latent (unobserved) dimensions underlying observed variables, developed by Louis Leon Thurstone in the 1930s and formalized by Jöreskog (1969). Exploratory factor analysis (EFA) discovers unknown factor structure from data; confirmatory factor analysis (CFA) tests hypothesized relationships between observed and latent variables. Essential in psychometrics (test development), organizational research (measuring constructs like leadership style), and biomedicine (identifying disease subtypes), factor analysis reduces dimensionality while revealing conceptual organization in multivariate data. | Hierarchical clustering is an unsupervised method that groups observations into nested clusters and draws the result as a dendrogram, so the number of clusters need not be fixed in advance. Its agglomerative form rests on the objective-function grouping criterion introduced by Joe Ward in 1963. |
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