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Peer reviewedRamsay, J. O. – Psychometrika, 1980
Some aspects of the small sample behavior of maximum likelihood estimates in multidimensional scaling are investigated with Monte Carlo techniques. In particular, the chi square test for dimensionality is examined and a correction for bias is proposed and evaluated. (Author/JKS)
Descriptors: Computer Programs, Goodness of Fit, Maximum Likelihood Statistics, Multidimensional Scaling
Peer reviewedvan Driel, Otto P. – Psychometrika, 1978
In maximum likelihood factor analysis, there arises a situation whereby improper solutions occur. The causes of those improper solution are discussed and illustrated. (JKS)
Descriptors: Computer Programs, Data Analysis, Factor Analysis, Goodness of Fit
Download full textWarm, Thomas A. – 1978
This primer is an introduction to item response theory (also called item characteristic curve theory, or latent trait theory) as it is used most commonly--for scoring multiple choice achievement or aptitude tests. Written for the testing practitioner with minimum training in statistics and psychometrics, it presents and illustrates the basic…
Descriptors: Ability Identification, Achievement Tests, Adaptive Testing, Aptitude Tests
