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ERIC Number: EJ853315
Record Type: Journal
Publication Date: 2009
Pages: 19
Abstractor: As Provided
Reference Count: 15
ISSN: ISSN-0022-0655
Small-Sample Equating Using a Single-Group Nearly Equivalent Test (SiGNET) Design
Puhan, Gautam; Moses, Timothy P.; Grant, Mary C.; McHale, Frederick
Journal of Educational Measurement, v46 n3 p344-362 Fall 2009
A single-group (SG) equating with nearly equivalent test forms (SiGNET) design was developed by Grant to equate small-volume tests. Under this design, the scored items for the operational form are divided into testlets or mini tests. An additional testlet is created but not scored for the first form. If the scored testlets are testlets 1-6 and the unscored testlet is testlet 7, then the first form is composed of testlets 1-6 and the second form is composed of testlets 2-7. The seven testlets are administered as a single administered form, and when a sufficient number of examinees have taken the administered form, the second form (testlets 2-7) is equated to the first form (testlets 1-6) using an SG equating design. As evident, this design facilitates the use of an SG equating and allows for the accumulation of data, both of which may reduce equating error. This study compared equatings under the SiGNET and common-item equating designs and found lower equating error for the SiGNET design in very small sample size conditions (e.g., N = 10).
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Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A