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ERIC Number: ED445011
Record Type: Non-Journal
Publication Date: 2000-Apr
Pages: 35
Abstractor: N/A
Reference Count: N/A
ISBN: N/A
ISSN: N/A
Nonequivalent Group Equating via 1-P HGLLM.
Chu, Kwang-lee; Kamata, Akihito
The quality of nonequivalent group equating by the one-parameter hierarchical generalized linear logistic model (1-P HGLLM) was examined by comparing it with: (1) traditional concurrent equating; (2) Stocking-Lord's method; and (3) multiple-group concurrent equating. Root mean squared errors (RMSEs) for item parameters indicated that there was no prominent difference among the four equating methods, and none of the four methods was consistently better than other methods across the entire item difficulty range. RMSEs for ability parameters of 1-P HGLLM were similar to those of traditional concurrent equating, which resulted in higher RMSEs than the Stocking-Lord method and multiple-group concurrent equating. The 1-P HGLLM method did not show advantages compared to other equating methods, but it did not show many disadvantages either. It is suggested that the equating model be extended in situations in which the effects of persons and group characteristics on performance are of interest. (Contains 6 tables, 18 figures, and 13 references.) (Author/SLD)
Publication Type: Numerical/Quantitative Data; Reports - Evaluative; Speeches/Meeting Papers
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A