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Komplexität modellieren - Faktorenanalyse am Scheideweg

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ISBN: 9783863950132 Year: Pages: 184 DOI: 10.17875/gup2011-464 Language: German
Publisher: Universitätsverlag Göttingen
Subject: Internal medicine --- Psychology --- Science (General)
Added to DOAB on : 2011-11-04 00:00:00
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The present study aims at disclosing a methodological prejudice which has misled factor analysis since its beginning. Simple structure, the guiding principle for factor rotation (Thurstone, 1935/1947), is regarded as a questionable dogma. The Thurstone principle impedes the discovery of latent sources of variance on which manifest empirical variables are based. This criticism is elucidated by theoretical considerations and by verbatim quotations of critical authors. The present calamity of factorial research is deemed to be due to general flaws of methodical reasoning. One-sided mathematical formalization in the discipline has lost its objectives by ignoring ordinary sources of knowledge and linguistic processing. The problem of simple structure cannot be solved by circumplex- and structural equation procedures which suffer from the same flaws as simple structure modelling. A paradigm change is overdue. An alternative factor transformation modeling complex structures is demanded, it will be delineated in chapter 2. This chapter is a sequel of chapter 1 (Ertel, 2009) in which varimax, the procedure of factor rotation commonly used to generate simple structure, is replaced with varimin. Varimin aims at manifesting interacting aspects of latent structural components. The model of complexity which is outlined by initial factor extractions is optimized. The new method raises a number of issues of which five are discussed at length. Are varimin factors interpretable Can latent sources of covariance, being complex already by initial solutions, be rendered more complex? Have simple structure solutions in common practice not been tolerable, to say the least? Varimin factor loadings are often bipolar. How to interpret the bipolarity of varimin factors? Does varimin reveal contributions of variance originating from methodical sources? Ten empirical applications of varimin transformation serve as examples. Particular features of transformation to complex structure, revealing latent sources of covariance (by varimin), are compared with pertinent results obtained from transformations to simple structure (by varimax). Varimax will remain useful merely for clustering objectives. Attention is also drawn to limitations of the methodical innovation. Eighteen matrices with intercorrelations of eight subtest variables of the intelligence test I-S-T, widely used in Germany, were subjected to principal component analysis, the resulting factors were rotated by varimin towards optimal complex structure. The 18 varimin solutions were aggregated, two factors resulted: Varimin-F1 represented a general factor g (‘general or basic intelligence’), varimin-F2 represented an achievement-modifying factor, obviously dependent on preceding educational training and learning (‘learning assets’, l). The validity of varimin-F1, general intelligence, was ascertained by high correlations between g and test scores of general intelligence, operationalized by culture-free tests CFT und FRT. The interpretation of varimin-F2 found support by significant correlations with learning-dependent school grades and scores in orthography and arithmetic. The 18 PCA-factors were also transformed by varimax to simple structure. This transformation caused a splitting up of initial g into two seemingly separate factors, called ‘fluid’ and ‘crystallized’ intelligence by convention. In addition, differences between varimax F1 (fluid) and F2 (crystallized) regarding correlations with external criteria (general intelligence vs. school grades, training scores in orthography and arithmetic) which should have emerged were missing. The aggregate of varimax results yielded an unexpected third factor with considerable weight which, however, turned out to be an artifact of simple structure. Apparently, simple structure modelling of intelligence test data blends general intelligence with learning effects. Rotation of intelligence data to simple structure does not reveal, as it should, independent c

Musiklernwelten erkennen und gestalten

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ISBN: 9783643505552 Year: Pages: 558 Seiten DOI: 10.26530/OAPEN_622218 Language: German
Publisher: LIT Verlag GmbH & Co. KG Grant: Austrian Science Fund - PUB 302
Added to DOAB on : 2017-01-14 11:01:19
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The research project Recognizing, Acknowledging and Designing Music Learning Worlds studied the educational practices and the music education principles of music school teachers in Austria. The project was designed as a qualitative comparative study, based on the Grounded Theory method, and using formal/informal (music) learning as a sensitizing concept. The resulting grounded theory defines the work of teachers in music schools as the constant process of recognizing, acknowledging and designing music learning worlds.

Bildung, Bedeutung und Gebrauch des russischen Verbalaspekts

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Book Series: Specimina philologiae Slavicae ISBN: 9783876908281 Year: Pages: 326 Language: German
Publisher: Peter Lang International Academic Publishing Group
Subject: Linguistics
Added to DOAB on : 2019-01-15 13:31:34
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Under the title "Education, Importance and Use of the Russian Verbal Aspect", a textbook is presented intended for advanced teaching at universities, colleges and high schools, for high-level, linguistically based self-education ("Autonomous Learning", better "autonomous study"), as well for teachers at colleges, language schools, high schools. This Part 1 contains the theoretical foundations - a didactic summary of the results of our work on the terminativity / aterativity of the Russian verb (Schlegel 1999) and the aspect-related reference moment (Schlegel 2001).

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