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irt-psychometrics-edu

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Calibrate IRT, detect DIF, and equate tests

Education & Research#psychometrics#model calibration#irt#item response theory#differential item functioning#test equating#educational measurement
Authorxjtulyc
Version1.0.0
Installs0

System Documentation

What problem does it solve?

This Skill helps you build and validate educational measurement models by estimating IRT parameters, quantifying measurement precision, and flagging items that behave differently across groups.

Core Features & Use Cases

  • Fit IRT (2PL/3PL) models: implement item characteristic curves (ICC) and item information functions (IIF) for ability testing.
  • Quantify measurement quality: compute test information functions (TIF) and derive standard error of measurement (SEM) across the ability scale.
  • Detect differential item functioning (DIF): use Mantel-Haenszel DIF detection with DIF category thresholds and p-values.
  • Understand test equating (Stocking-Lord): support concepts needed to convert scores across different test forms.

Quick Start

Use the irt-psychometrics-edu Skill to calibrate 2PL/3PL item parameters from a binary response matrix, compute ICC/IIF/TIF/SEM, and run Mantel-Haenszel DIF screening on selected demographic groups.

Dependency Matrix

Required Modules

None required

Components

Standard package

💻 Claude Code Installation

Recommended: Let Claude install automatically. Simply copy and paste the text below to Claude Code.

Please help me install this Skill:
Name: irt-psychometrics-edu
Download link: https://github.com/xjtulyc/awesome-rosetta-skills/archive/main.zip#irt-psychometrics-edu

Please download this .zip file, extract it, and install it in the .claude/skills/ directory.
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