Ramanaiah, Nerella V.O'Donnell, James P.Adams, Michael2011-01-282011-01-281978Ramanaiah, Nerella V, O'Donnell, James P & Adams, Michael. (1978). A test of the theoretical model of the Revised Illinois Test of Psycholinguistic Abilities. Applied Psychological Measurement, 2, 519-525. doi:10.1177/014662167800200406doi:10.1177/014662167800200406https://hdl.handle.net/11299/99447This study tested the theoretical model underlying the Revised Illinois Test of Psycholinguistic Abilities (ITPA). The ITPA model is a hierarchical factor model which includes five first-order factors (Receptive Process, Organizing Process, Expressive Process, Closure, and Sequential Memory); two second-order factors (Representational Level and Automatic Level); and one third-order factor (Psycholinguistic Ability). Results from correlated multiple-group component analyses of the ITPA subtest intercorrelations for each age group in the standardization sample provided strong support for the theoretical model.enArticle