PPT-Confirmatory Factor Analysis Part Two

STA431 Spring 2013 See last slide for copyright information THE TRUTH Well closer to the truth anyway Why should the variance of the factors equal one Inherited from exploratory factor analysis which was mostly a disaster. Hans Baumgartner. Penn State University. x. 1. x. 2. x. 3. x. 4. x. 5. x. 6. x. 7. x. 8. What’s the structure underlying . 28 distinct . covariances. between . 8 observed variables?. The exploratory factor model. AnnMaria De Mars, PhD.. The Julia Group & 7 Generation Games . WHY?. Imagine this. What exactly were you planning on doing with that?. Let’s say you have a massive pile of data …. . You Could:. Prepared by. Ferry . Dzulkifli. Tita. . Borshalina. FACTOR ANALYSIS. Factor Analysis Defined. Factor analysis . . .. is an interdependence technique whose primary purpose is to define the underlying structure among the variables in the analysis.. Hans Baumgartner. Penn State University. x. 1. x. 2. x. 3. x. 4. x. 5. x. 6. x. 7. x. 8. What’s the structure underlying . 28 distinct . covariances. between . 8 observed variables?. The exploratory factor model. The purpose of factor analysis is to discover patterns in the relationships among the . variables. Factor Analysis. Form of multiple correlations. Checking for construct validity. Do questions measure the same dimension?. STA431: Spring 2013. See last slide for copyright information. THE TRUTH. (Well, closer to the truth, anyway). Regression-like models are close enough to the truth. Latent variables have unknown expected values and variances.. BMTRY 726. 7/19/16. Factor Rotation. Recall, can conduct orthogonal transformations of the factors and still reconstruct the covariance of . X. . Means can use orthogonal transformations of the factor loading matrix to “simplify” the interpretation of the factors. Strengthening the link between entrepreneurial proclivities and entrepreneurial outcomes. John Pisapia. Florida Atlantic University, USA. Keith Feit. Florida Atlantic University. John Morris. Florida Atlantic University. The basic objective of Factor Analysis is data reduction or structure detection.. The purpose of . data reduction.  is to remove redundant (highly correlated) variables from the data file, perhaps replacing the entire data file with a smaller number of uncorrelated variables.. Dept. of PHS, Division of . Biostats. & . Bioinf. Biostatistics Shares Resource, Hollings Cancer Center. Cancer Control Journal Club. March 3, 2016. Motivating Example. Goals of paper. 1. See if previously defined measurement model of hopelessness in advanced cancer fits this sample. Confirmatory Factor Analysis.. SPSS/AMOS. The WISC, Verbal IQ. INFOrmation. – general knowledge questions. COMPrehension. – of social situations and common concepts. ARITHmetic. SIMILarities. – how are two words similar. VOCABulary. October 10, 2018. Applied Psychometric Strategies Lab. Applied Quantitative and Psychometric Series. What are some example questions (RQs) and hypotheses (RHs) one can propose within a CFA framework?. Andrej Srakar, . PhD. Institute . for. . Economic. . Research. , Ljubljana . and. . Faculty. of . Economics. , University of Ljubljana, . Slovenia. 1. Structure. of . the. . presentation. Research. variables. Factor Analysis. Form of multiple correlations. Checking for construct validity. Do questions measure the same dimension?. For use between or within a test. Identify items which cluster together.