ERIC Number: EJ239606
Record Type: Journal
Publication Date: 1980
Reference Count: N/A
A Procedure for Investigating the Unidimensionality of Achievement Tests Based on Item Parameter Estimates.
Bejar, Isaac I.
Journal of Educational Measurement, v17 n4 p283-96 Win 1980
Two procedures are presented for detecting violations of the unidimensionality assumption made by latent trait models without requiring factor analysis of inter-item correlation matrices. Both procedures require that departures from unidimensionality be hypothesized beforehand. This is usually possible in achievement tests where several content areas are included. (Author/RL)
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A