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Direct linkRausch, Joseph R. – Applied Psychological Measurement, 2009
The investigation of change in factor structure over time can provide new opportunities for the development of theory in psychology. The method proposed to investigate change in intraindividual factor structure over time is an extension of P-technique factor analysis, in which the P-technique factor model is fit within relatively small windows of…
Descriptors: Monte Carlo Methods, Factor Structure, Factor Analysis, Item Response Theory
Templin, Jonathan L.; Henson, Robert A.; Templin, Sara E.; Roussos, Louis – Applied Psychological Measurement, 2008
Several types of parameterizations of attribute correlations in cognitive diagnosis models use the reduced reparameterized unified model. The general approach presumes an unconstrained correlation matrix with K(K - 1)/2 parameters, whereas the higher order approach postulates K parameters, imposing a unidimensional structure on the correlation…
Descriptors: Factor Structure, Identification, Correlation, Computation
Gibbons, Robert D.; Bock, R. Darrell; Hedeker, Donald; Weiss, David J.; Segawa, Eisuke; Bhaumik, Dulal K.; Kupfer, David J.; Frank, Ellen; Grochocinski, Victoria J.; Stover, Angela – Applied Psychological Measurement, 2007
A plausible factorial structure for many types of psychological and educational tests exhibits a general factor and one or more group or method factors. This structure can be represented by a bifactor model. The bifactor structure results from the constraint that each item has a nonzero loading on the primary dimension and, at most, one of the…
Descriptors: Factor Analysis, Item Response Theory, Computation, Factor Structure
Peer reviewedvan Schuur, Wijbrandt H.; Kiers, Henk A. L. – Applied Psychological Measurement, 1994
The identification of two factors when one factor is expected is an artifact caused by using factor analysis on data that would be more appropriately analyzed with a unidimensional unfolding model. A numerical illustration is given, and ways to determine whether data conform to the unidimensional unfolding model are reviewed. (SLD)
Descriptors: Factor Analysis, Factor Structure, Matrices, Models
Zinbarg, Richard E.; Yovel, Iftah; Revelle, William; McDonald, Roderick P. – Applied Psychological Measurement, 2006
The extent to which a scale score generalizes to a latent variable common to all of the scale's indicators is indexed by the scale's general factor saturation. Seven techniques for estimating this parameter--omega[hierarchical] (omega[subscript h])--are compared in a series of simulated data sets. Primary comparisons were based on 160 artificial…
Descriptors: Computation, Factor Analysis, Reliability, Correlation
Peer reviewedBennett, Randy Elliot; And Others – Applied Psychological Measurement, 1991
Convergent validity of expert-systems scores for 4 complex constructed-response mathematical formats was assessed for 249 examinees from the Graduate Record Examinations (GRE) General Test in June 1989. The hypothesized five-factor model fit the data well, but an alternative with two dimensions (GRE-quantitative and constructed-response)…
Descriptors: College Entrance Examinations, Constructed Response, Educational Assessment, Expert Systems
