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Zhi-Lin Song

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Aug 2026

Detecting differential item functioning with unknown subgroups and anchor items in cognitive diagnostic assessment.

Differential item functioning (DIF) analysis is essential for evaluating measurement invariance in educational and psychological assessments. In cognitive diagnostic assessment, however, most existing methods require prespecified comparison subgroups and anchor items. When subgroup membership and anchor items are unava...

Zhi-Lin Song, Qing Zeng, Ping Chen · 0 citations

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