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ERIC Number: EJ1168079
Record Type: Journal
Publication Date: 2018
Pages: 22
Abstractor: As Provided
ISSN: ISSN-1062-7197
Using Person Response Functions to Investigate Areas of Person Misfit Related to Item Characteristics
Walker, A. Adrienne; Jennings, Jeremy Kyle; Engelhard, George, Jr.
Educational Assessment, v23 n1 p47-68 2018
Individual person fit analyses provide important information regarding the validity of test score inferences for an "individual" test taker. In this study, we use data from an undergraduate statistics test (N = 1135) to illustrate a two-step method that researchers and practitioners can use to examine individual person fit. First, person fit is examined numerically with several indices based on the Rasch model (i.e., Infit, Outfit, and Between-Subset statistics). Second, person "mis"fit is presented graphically with person response functions, and these person response functions are interpreted using a heuristic. Individual person fit analysis holds promise for improving score interpretation in that it may detect potential threats to validity of score inferences for some test takers. Individual person fit analysis may also highlight particular subsets of items (on which a test taker performs unexpectedly) that can be used to further contextualize her or his test performance.
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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