March 2016
Beginner to intermediate
232 pages
12h 12m
English
Content preview from Exploratory Factor Analysis with SASBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Extraction Techniques
Seven
EFA extraction techniques are available in SAS. These methods span
the range of options commonly used by researchers and include all
methods generally available in other common statistical software applications
(e.g., SPSS, STATA). Each is further described below.
Principal
axes factor (PAF) extraction is a variation of PCA. This method replaces the diagonal elements of the matrix of associations (e.g., correlation or covariance matrix) with the initial communality estimates, or initial estimates of the shared variance. In PCA this substitution does not occur, effectively permitting PCA to estimate components using all of the variance and not just the shared variance, When this substation occurs, it acknowledges ...
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