Assessing essential unidimensionality of real data

Nandakumar, Ratna
1993
Thumbnail Image

View/Download File

v17n1p029.pdf (804.24 KB)

Persistent link to this item

https://hdl.handle.net/11299/116305
Statistics
View Statistics

Journal Title

Journal ISSN

Volume Title

Title

Assessing essential unidimensionality of real data

Authors

Published Date

1993

Publisher

Type

Article

Abstract

The capability of DIMTEST in assessing essential unidimensionality of item responses to real tests was investigated. DIMTEST found that some test data fit an essentially unidimensional model and other data did not. Essentially unidimensional test data identified by DIMTEST then were combined to form two-dimensional test data. The power of Stout’s statistic T was examined for these two-dimensional data. DIMTEST results on real tests replicated findings from simulated tests-T discriminated well between essentially unidimensional and multidimensional tests. T was also highly sensitive to major traits and insensitive to relatively minor traits that influenced item responses. Index terms: DIMTEST, essential unidimensionality, essential independence, multidimensionality, unidimensionality.

Keywords

Description

Related to

Replaces

License

Collections

Applied Psychological Measurement, Volume 17, 1993

Series/Report Number

Funding information

Isbn identifier

Doi identifier

Previously Published Citation

Nandakumar, Ratna. (1993). Assessing essential unidimensionality of real data. Applied Psychological Measurement, 17, 29-38. doi:10.1177/014662169301700108

Suggested citation

Nandakumar, Ratna. (1993). Assessing essential unidimensionality of real data. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/116305.

Content distributed via the University Digital Conservancy may be subject to additional license and use restrictions applied by the depositor. By using these files, users agree to the Terms of Use. Materials in the UDC may contain content that is disturbing and/or harmful. For more information, please see our statement on harmful content in digital repositories.