Leistungsbestimmende Faktoren Im Zehnkampf
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Leistungsbestimmende Faktoren Im Zehnkampf
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Author : Hansruedi Kunz
language : de
Publisher:
Release Date : 1980
Leistungsbestimmende Faktoren Im Zehnkampf written by Hansruedi Kunz and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Decathlon categories.
Factor Analysis
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Author : Ertel, Suitbert
language : en
Publisher: Universitätsverlag Göttingen
Release Date : 2013-09-24
Factor Analysis written by Ertel, Suitbert and has been published by Universitätsverlag Göttingen this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-09-24 with Psychology categories.
Exploratory factor analysis (EFA) is a statistical tool for digging out hidden factors which give rise to the diversity of manifest objectives in psychology, medicine and other sciences. EFA had its heyday as psychologist Leon Thurstone (1935 and 1948) based EFA on what he called the “principle of simple structure” (SS). This principle, however, was erroneous from the beginning what remained unrecognized despite subsequent inventions of more sophisticated statistical tools such as confirmatory analysis and structural equation modeling. These methods are highly recommended today as tolerable routes to model complexities of observation. But they did not remove the harmful errors that SS had left behind. Five chapters in this book demonstrate and explain the trouble. In chapter 2 the ailment of SS is healed by introducing an unconventional factor rotation, called Varimin. Varimin gives variables of an analysis an optimal opportunity to manifest functional interrelations underlying correlational observations. Ten applications of Varimin (in chapter 2) show that its results are superior to results obtained by the conventional Varimax procedure. Further applications are presented for sports achievements (chapter 3), intelligence (chapter 4), and personality (chapter 5). If Varimin keeps on standing the tests new theoretical building blocks will arise together with conceptual networks promoting a better understanding of the domains under study. Readers may check this prognosis by themselves using the statistical tool (Varimin) which is provided by open access in the internet.
Sports Biomechanics
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Author : Roger Bartlett
language : en
Publisher: Taylor & Francis
Release Date : 1999
Sports Biomechanics written by Roger Bartlett and has been published by Taylor & Francis this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Medical categories.
Students who are studying biomechanics in years two and three of their degree and postgraduate students of biomechanics will find this textbook invaluable.
Sports Biomechanics
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Author : Melanie Bussey
language : en
Publisher: Routledge
Release Date : 2002-09-11
Sports Biomechanics written by Melanie Bussey and has been published by Routledge this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-09-11 with Sports & Recreation categories.
This advanced text is the companion volume to Introduction to Sports Biomechanics, also written by Roger Bartlett. Focussing on third year undergraduate and postgraduate topics the text explores sports injury in relation to biomechanics. Part One presents a detailed examination of sports injury, including the properties of biological materials, mechanisms of injury occurrence, risk reduction, and the estimation of forces in biological structures. Part Two concentrates on the biomechanical enhancement of sports performance and covers in detail the analysis of sports technique, statistical and mathematical modelling of sports movements, and the feedback of results to improve performance. Each chapter feature an introduction, summary, references, example exercises and suggestions for further reading, making this an invaluable textbook for students who wish to specialize in sports biomechanics or sports injury and rehabilitation.
Komplexit T Modellieren
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Author : Suitbert Ertel
language : de
Publisher: Universitätsverlag Göttingen
Release Date : 2011
Komplexit T Modellieren written by Suitbert Ertel and has been published by Universitätsverlag Göttingen this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Infectious and parasitic diseases categories.
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 contributions of latent functional components. The results of a factorial study are reported using sports data whose underlying sources of variance are more transparent than those of invisible mental data: decathlon record scores. The aim was to compare varimin and varimax results regarding factorial stability and interpretability. It is shown that varimin factors revealed latent sources of variance in interaction, while varimax factors yielded obscure clusters of those sources of variance. In addition, factor structures obtained by varimin rotation were more robust to changing data sources than those obtained by varimax rotation. The new methodical turn might revive exploratory factorial research which, due to questionable results of the past, has lost reputation. Ein fataler Fehler der konventionellen Psychometrie wird in dieser Monographie aufgedeckt. Das Prinzip der Einfachstruktur, an dem sich seit den Anfängen der Faktorenanalyse alle Varianten der Rotation extrahierter Faktoren ausgerichtet haben, geht an der empirischen Realität vorbei. Das „Simple Structure2-Prinzip zwingt die Variablen einer multivariaten Untersuchung in ein monokausales Korsett und hindert sie daran, die tatsächlich vorliegende Komplexität latenter Komponenten zu entfalten. Dies ist der Grund, warum faktorenanalytische Ergebnisse durchweg theoretisch fruchtlos blieben und eher Unbehagen als Zufriedenheit mit sich brachten. Mit den später entwickelten konfirmatorischen Verfahren, die am realitätsfremden Ideal der Einfachstruktur festhielten, wurde keine Wende erzielt. Eine Wende aber stellt sich ein, sobald man sich dazu entschließt, bei der Rotation von Faktoren das scheinbar unverzichtbare Prinzip der Einfachstruktur aufzugeben und mehrfaktorielle Komplexität der Variablen unbeschränkt zuzulassen. Dazu dient in der statistischen Praxis das vom Verfasser entwickelte Rotationsverfahren Varimin. Die Ergebnisse von Varimin-Analysen, die in diesem Buch beschrieben werden, übertreffen die Ergebnisse von Einfachstruktur-Analysen (Varimax) an Deutbarkeit, Stabilität, und - scheinbar paradoxerweise – sogar auch an Einfachheit.
Sportwissenschaft
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Author :
language : de
Publisher:
Release Date : 1981
Sportwissenschaft written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Physical education and training categories.
Deutsche Bibliographie
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Author : Deutsche Bibliothek (Frankfurt am Main, Germany)
language : de
Publisher:
Release Date : 1982
Deutsche Bibliographie written by Deutsche Bibliothek (Frankfurt am Main, Germany) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Dissertations, Academic categories.
Jahresverzeichnis Der Hochschulschriften
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Author :
language : de
Publisher:
Release Date : 1983
Jahresverzeichnis Der Hochschulschriften written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Dissertations, Academic categories.
Praxis Der Psychologie Im Leistungssport
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Author : Hartmut Gabler
language : de
Publisher:
Release Date : 1979
Praxis Der Psychologie Im Leistungssport written by Hartmut Gabler and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Sports categories.
Flow Experience
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Author : László Harmat
language : en
Publisher: Springer
Release Date : 2016-05-15
Flow Experience written by László Harmat and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-05-15 with Psychology categories.
This volume provides updates and informs the reader about the development of the current empirical research on the flow experience. It opens up some new research questions at the frontiers of the field. The book offers an overview on the latest findings in flow research in several fields such as social psychology, neuropsychology, performing arts and sport, education, work and everyday experiences. It integrates the latest knowledge on experimental studies of optimal experience with the theoretical foundation of psychological flow that was laid down in the last decades.