ERIC Number: EJ627391
Record Type: Journal
Publication Date: 2001
Reference Count: N/A
The Extra-Factor Phenomenon Revisited: Unidimensional Unfolding as Quadratic Factor Analysis.
Maraun, Michael D.; Rossi, Natasha T.
Applied Psychological Measurement, v25 n1 p77-87 Mar 2001
Demonstrated that the extra-factor phenomenon (the two-dimensional solution produced when linear factor analysis is applied to a set of unfoldable items) arises because the metric unidimensional unfolding model is equivalent to the unidimensional quadratic factor model and the unidimensional quadratic factor model is not distinguishable from the two-dimensional linear factor model at the level of covariance structure. (SLD)
Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Authoring Institution: N/A