🛠️ Build resilient tests that adapt to file changes by focusing on code structure, ensuring your testing remains effective through refactoring.

A Measurement Analysis of Multilingual Safety Evaluation (under review at COLM 2026)

QOrium — The world's question bank for hiring. Enterprise-grade Question-Bank-as-a-Service.

Multidimensional item response theory

Extended Response Time Item Response Models with Polya-Gamma Sampler and Bayesian Quantile Regression.

ML/AI workers for Innova EdTech. Python 3.11 + Anthropic Claude + Gemini Vision. Implements BKT calibration, IRT fitting, LLM error classification, and OCR vision pipeline. AWS Lambda container images.

idealstan offers item-response theory (IRT) ideal-point estimation for binary, ordinal, counts and continuous responses with time-varying and missing-data inference. Latent space model also included. Full and approximate Bayesian sampling with 'Stan' (www.mc-stan.org).

Book tutorial on Item Response Theory (IRT) using python interface. Dichotomous, Polytomous, Quantitative, and Multidimensional IRT models are introduced.

Computerized Adaptive Testing Simulator

Person Parameter estimation (1,2,3,4PL model) and GPCM

A Shiny application for tree-based detection of Differential Item and Step Functioning in polytomous items

https://www.linkedin.com/in/sarbah-fred-junior

PsyFramework is a standards-aligned platform for psychiatric assessment and research. It unifies surveys across ICD-10/11 and DSM-5-TR, with harmonized items, crosswalks, configurable batteries, longitudinal tracking, and exportable research-grade datasets.

psymetrics provides a unified workflow to extract, compare, format, and visualize psychometric model results across R packages like lavaan, psych, and mirt.

AI-powered adaptive testing engine using FastAPI, MongoDB, and IRT-based difficulty adjustment.

Adaptive learning engine with IRT algorithm and AI-powered study plans using Gemin

1D Adaptive Testing Engine using Item Response Theory (IRT) | FastAPI · MongoDB Atlas · GPT-4o-mini | Dynamically adjusts GRE question difficulty based on real-time ability estimation

Adaptive GRE prep tool using 1PL IRT with Fisher Information item selection for real-time ability estimation. LLM generates personalized study plans with curated resources. Built with FastAPI, MongoDB Atlas, Clerk Auth, and OpenRouter. 74 tests, Docker support, structured logging.

IRT-based adaptive testing engine with real-time question selection

A collection of generic R templates for IRT analysis. These scripts are intended to be reusable: simply load your own dataset and adjust the variable names to apply the models to your specific use case.