Abstract
We present a simple approximation to the conditional distribution of goodness-of-fit statistics for the Rasch model, assuming that the item difficulties are known. The approximation is easily programmed, and gives relatively accurate assessments of conditional p-values for tests of length 10 or more. A few generalizations are discussed.
Original language | English (US) |
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Pages (from-to) | 191-199 |
Number of pages | 9 |
Journal | Psychometrika |
Volume | 62 |
Issue number | 2 |
DOIs | |
State | Published - Jun 1997 |
Externally published | Yes |
Keywords
- Edgeworth expansion
- Exact p-value
- Saddlepoint approximation
ASJC Scopus subject areas
- Psychology(all)
- Applied Mathematics