Psychometric Tools

DIF-AnalysisTool

Differential Item Functioning analysis via Mantel-Haenszel and TSW

About this tool

DIF-AnalysisTool detects items that function differently across groups using Mantel-Haenszel and TSW likelihood-ratio tests with iterative purification. Supports dichotomous and polytomous items, multiple groups, and nested group structures. Runs entirely in the browser.

Data & Setup

Drag & drop or click to select a .csv or .txt file

or

Method & Configuration

Analysis method