Item Parameters Invariant with Changes in Group Variance
- Author(s):
-
Gulliksen, Harold O.
- Publication Year:
- 1950
- Report Number:
-
RB-50-50
- Source:
-
ETS Research Bulletin
- Document Type:
- Report
- Page Count:
- 10
- Subject/Key Words:
-
Equations (Mathematics),
Item Analysis
Abstract
Formulas are derived for indexes of item difficulty that are invariant with respect to explicit selection.
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