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Factor Analysis1
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Psychometrika2
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Kiers, Henk A. L.1
Meredith, William1
Tisak, John1
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Exploratory Longitudinal Factor Analysis in Multiple Populations.
Peer reviewed Peer reviewed
Tisak, John; Meredith, William – Psychometrika, 1989
A longitudinal factor analysis model that is entirely exploratory is proposed for use with multiple populations. Factorial collapse, period/practice effects, and an invariant and/or stationary factor pattern are allowed. The model is formulated stochastically and implemented via a stage-wise EM algorithm. (TJH)
Descriptors: Algorithms, Factor Analysis, Longitudinal Studies, Maximum Likelihood Statistics
An Efficient Algorithm for TUCKALS3 on Data with Large Numbers of Observation Units.
Peer reviewed Peer reviewed
Kiers, Henk A. L.; And Others – Psychometrika, 1992
A modification of the TUCKALS3 algorithm is proposed that handles three-way arrays of order I x J x K for any I. The reduced work space needed for storing data and increased execution speed make the modified algorithm very suitable for use on personal computers. (SLD)
Descriptors: Algorithms, Equations (Mathematics), Least Squares Statistics, Mathematical Models