Ability metric transformations involved in vertical equating under item response theory
1984
Loading...
View/Download File
Persistent link to this item
Statistics
View StatisticsJournal Title
Journal ISSN
Volume Title
Title
Ability metric transformations involved in vertical equating under item response theory
Authors
Published Date
1984
Publisher
Type
Article
Abstract
The metric transformations of the ability scales involved
in three equating techniques-external anchor
test, internal anchor test, and a pooled groups procedure
-were investigated. Simulated item response data
for two unique tests and a common test were obtained
for two groups that differed with respect to mean ability
and variability. The obtained metrics for various
combinations of groups and tests were transformed to
a common metric and then to the underlying ability
metric. The results showed that there was reasonable
agreement between the transformed obtained metrics
and the underlying ability metric. They also showed
that the largest errors in the ability score statistics occurred
under the external anchor test procedure and
the smallest under the pooled procedures. Although
the pooled procedure performed well, it was affected
by unequal variances in the two groups of examinees.
Keywords
Description
Related to
Replaces
License
Series/Report Number
Funding information
Isbn identifier
Doi identifier
Previously Published Citation
Baker, Frank B. (1984). Ability metric transformations involved in vertical equating under item response theory. Applied Psychological Measurement, 8, 261-271. doi:10.1177/014662168400800302
Other identifiers
doi:10.1177/014662168400800302
Suggested citation
Baker, Frank B.. (1984). Ability metric transformations involved in vertical equating under item response theory. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/101910.
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.