From: Investigating the effect of classroom-based feedback on speaking assessment: a multifaceted Rasch analysis
No.
Facets identified in the study
Percentage effect on total score variance
1
Test taker ability
44.82
2
Rater severity
26.13
3
Group expertise
14.67
4
Test version
6.58
5
Task difficulty
4.74
6
Scale categories
3.06
100