Abstract
Item response theory posits "local independence," or conditional independence of item responses given item parameters and examinee proficiency parameters. The usual definition of local independence, however, addresses the context of fixed tests, and initially appears to yield incorrect response-pattern probabilities in the context of adaptive testing. The paradox is resolved by introducing additional notation to deal with the item selection mechanism.
Original language | English (US) |
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Pages (from-to) | 149-156 |
Number of pages | 8 |
Journal | Psychometrika |
Volume | 65 |
Issue number | 2 |
DOIs | |
State | Published - Jun 2000 |
Externally published | Yes |
Keywords
- Adaptive testing
- Conditional independence
- Item response theory (irt)
- Local independence
ASJC Scopus subject areas
- Mathematics (miscellaneous)
- General Psychology
- Psychology (miscellaneous)
- Social Sciences (miscellaneous)