The Quartimax Method

The procrustes program: Producing direct rotation to test a hypothesized factor structure

“…No computer program has yet been constructed for the latter, since certain difficulties remain to be overcome (Cattell and Cattell, 1955), but a variety of propositions and programs (Barlow and Burt. 1954; Mosier, 1939; Neuhaus and Wrigley, 1954) exist for analytically finding simple structure. Some, unfortunately, are restricted to an orthogonal outcome, incompatible with the best approximation to simple structure; but others, such as oblimax (Saunders, 1961), minimax (Carroll, 1953) and maxplane (Cattell and Muerle, 1960) are free to reach either oblique or orthogonal simple structure, according to the needs of the data.…”

Structure learning for belief rule base expert system: A comparative study

“…To get a clearer vision on the loadings, some rotation means are applied to make the loadings polarized and show more contrast. The ''quartimax rotation'' [56] is used in this study and any attribute with a loading higher than 0.8 is considered to be of more importance.…”

“…The loadings are rotated using the ''quartimax rotation'' [56] and the rotated component matrix is derived, as shown in Tables 7 and 8. The rotated loadings over 0.8 are considered to be of greater significance and they are marked in bold characters.…”

The "Maxplane" Program for Factor Rotation to Oblique Simple Structure

“…Available computer programs using analytical methods (whether aiming, incidentally, at oblique or orthogonal resolutions of rotation) use either the principle of maximizing fourth powers, as in Wrigley's quartimax (Neuhaus & Wrigley, 1954) and Saunders', Pinzka's, and Dickman's oblimax (Pinzka & Saunders, 1954) or on the distinct principle involved in Kaiser's varimax (1959) and in Carroll's oblimin, biquartimin and his other prosolutions in which two factors have very similar loading patterns. Since there seems to be a systematic tendency for a minority of such &dquo;cooperative&dquo; (Cattell, 1952) simple structure factors actually to occur in nature (Cattell, 1957), the correct solutions are avoided or distorted.…”