Vertaile menetelmiä
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| Faktorianalyysi× | Pääkomponenttianalyysi× | |
|---|---|---|
| Tieteenala≠ | Tutkimuksen tilastomenetelmät | Koneoppiminen |
| Menetelmäperhe≠ | Process / pipeline | Machine learning |
| Syntyvuosi≠ | 1931 | 2002 |
| Kehittäjä≠ | Louis Leon Thurstone | Jolliffe, I.T. (textbook); Pearson & Hotelling (origins) |
| Tyyppi≠ | Method | Unsupervised dimensionality reduction |
| Alkuperäislähde≠ | Thurstone, L. L. (1947). Multiple Factor Analysis. University of Chicago Press. DOI ↗ | Jolliffe, I.T. (2002). Principal Component Analysis (2nd ed.). Springer. DOI ↗ |
| Rinnakkaisnimet≠ | EFA, CFA, latent variable modeling | Temel Bileşenler Analizi (PCA), PCA, principal components analysis, Karhunen-Loève transform |
| Liittyvät | 3 | 3 |
| Tiivistelmä≠ | 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. | Principal Component Analysis (PCA) is an unsupervised dimensionality-reduction method — given its modern textbook treatment by Ian Jolliffe (2002) — that compresses high-dimensional data into fewer dimensions while preserving the maximum possible variance. It re-expresses correlated variables as a small set of uncorrelated principal components ordered by how much of the data's variation each one captures. |
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