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ERIC Number: EJ1158769
Record Type: Journal
Publication Date: 2017-Dec
Pages: 12
Abstractor: As Provided
ISSN: ISSN-0361-0365
Using Rasch Analysis to Inform Rating Scale Development
Van Zile-Tamsen, Carol
Research in Higher Education, v58 n8 p922-933 Dec 2017
The use of surveys, questionnaires, and rating scales to measure important outcomes in higher education is pervasive, but reliability and validity information is often based on problematic Classical Test Theory approaches. Rasch Analysis, based on Item Response Theory, provides a better alternative for examining the psychometric quality of rating scales and informing scale improvements. This paper outlines a six-step process for using Rasch Analysis to review the psychometric properties of a rating scale. The Partial Credit Model and Andrich Rating Scale Model will be described in terms of the pyschometric information (i.e., reliability, validity, and item difficulty) and diagnostic indices generated. Further, this approach will be illustrated through the example of authentic data from a university-wide student evaluation of teaching.
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Publication Type: Journal Articles; Reports - Research
Education Level: Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A