Items flagged as DIF were generally positioned at considerably different places between booklets, suggesting position-related DIF¶
Claim · All claims
Evidence · 1 study · associationalr2·q2
Currency · newest study 2021 · not yet checked against its sources · not reviewed by a person · overdue for a recheck since 2024: tool and model accuracy changes quickly
Subclaims¶
Reading the evidence codes
q is the design tier, i the impact, n the sample, and the kind with its r
the rigour judged within that kind: what each code means.
This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.
q2 i? DIF-flagged items typically occupied considerably different positions across booklets, which the authors interpret as indicating that DIF may result from item position. → Soysal 2021
Evidence¶
Soysal 2021¶
Soysal, S., & Yilmaz Kogar, E. (2021). An Investigation of Item Position Effects by Means of IRT-Based Differential Item Functioning Methods. International Journal of Assessment Tools in Education, 8(2), 239-256. https://doi.org/10.21449/ijate.779963
q2 · i? · associational · r2
Observational analysis of TEOG booklet data: among items flagged in at least one method, items 6, 9, 15, and 17 in Booklet A appear in positions 1, 14, 9, and 7 in Booklet B, supporting that "DIF may result from the position of the item in the test."
"the fact that the items flagged as DIF are generally positioned at considerably different places between booklets can indicate that DIF may result from the position of the item in the test."
Discussion¶
Related Claims¶
- Some items positioned close together across booklets were also flagged as DIF, possibly due to Type I error from sampling — reports the opposite
- An item positioned later in one booklet was found more difficult by that booklet's test takers, attributed to fatigue effect — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
dif-items-differently-positioned-across-booklets |
title |
Items flagged as DIF were generally positioned at considerably different places between booklets, suggesting position-related DIF |
description |
Items flagged as DIF were generally positioned at considerably different places between booklets, suggesting position-related DIF |
status |
review |
evidence_strength |
weak |
newest_evidence |
2021 |
recheck_by |
2024 |
generated |
by process:wiki-ingest on 2026-09-26 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — soysal-2021 |
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