ERIC Number: ED021230
Record Type: RIE
Publication Date: 1968-Feb-1
Reference Count: 0
A Comparison of the Factor Structure of the ITPA on 18 Factor Analyses.
Ryckman, David B.; Wiegerink, Ronald
This study was designed to factor analyze the correlation matrices of a number of studies utilizing the Illinois Test of Psycholinguistic Abilities (ITPA). All of the correlation matrices were analyzed on the same program using the same criteria. By this approach, it was possible to examine trends between studies. More factors tended to appear as chronological age increased. Although there was little consistency of factor structure between age groups, analyses of three groups at the same age level produced a reasonable amount of consistency. Analyses of the three major dimensions of the ITPA (channel, level, and process) revealed that channel differentiation was best achieved by the test. There was little in the way of differentiation in the younger age groups for the level and process evaluation. However, for the older age groups (approximately six years and above), it appears that the test was moderately successful in assessing some of the dimensions for which it was intended. (Author/DO)
Publication Type: N/A
Education Level: N/A
Sponsor: Office of Education (DHEW), Washington, DC. Bureau of Research.
Authoring Institution: Michigan Univ., Ann Arbor. Center for Research on Language and Language Behavior.
Identifiers: Illinois Test of Psycholinguistic Abilities
Note: Report included in Studies in Language and Language Behavior, Progress Report No. VI.