Meesum S.

Psychometrician & Statistician | MUPP & IRT | Assessment Validation

I am a dedicated Statistician and Psychometrician with over 5+ years of specialized experience in assessment development, validation, and data-driven decision-making. I help organizations design fair, reliable, and scientifically grounded assessments—and turn complex data into clear, actionable insights. What I Do Best ✅ Psychometric Test Development & Validation Construct, Reliability, and Fairness (DIF) Validation using MUPP (Multi-Unidimensional Pairwise Preference) models Item Response Theory (IRT) calibration: Rasch, 2PL, 3PL, and specialized models Classical Test Theory (CTT): Item analysis, reliability estimation, and validity testing Differential Item Functioning (DIF) to detect and eliminate item bias across gender, age, and ethnicity ✅ Advanced Data Analysis in R End-to-end data cleaning, wrangling, and visualization using tidyverse, ggplot2, and psych packages Structural Equation Modeling (SEM), Confirmatory Factor Analysis (CFA), and Exploratory Factor Analysis (EFA) Machine learning applications for predictive analytics and score pattern recognition Automated reporting with R Markdown & LaTeX for professional, publication-ready outputs ✅ Large-Scale Assessment & Research Former experience with Pakistan’s Higher Education Commission (HEC), working on national-level testing systems Development and maintenance of large item banks, equating studies, and standard-setting Survey design, sampling strategy, and statistical weighting for generalizable results Why Work With Me? 🔹 You’re launching a new psychometric assessment – I’ll ensure it’s valid, reliable, and fair before it reaches the market. 🔹 You need to validate an existing test – I’ll run full-scale psychometric analysis and provide a clear roadmap for improvements. 🔹 You have assessment data but aren’t sure what it means – I’ll analyze it and translate results into plain-language insights. 🔹 You’re looking for an analyst who can also think like a consultant – I bridge the gap between statistical rigor and practical application. Recent Project Example SSM (Shaw Strengths Matrix) Personality Assessment Led Phase 1 Validation: Construct validity (MUPP), Reliability (EAP, Cronbach’s Alpha), and Fairness (DIF) analysis Cleaned, filtered, and analyzed 500+ survey responses in R Delivered comprehensive technical report with clear recommendations for test improvement Collaborated with a UK-based psychologist and Australian client to align analysis with international standards Technical Toolkit 📊 Software: R/RStudio | SPSS | Excel | LaTeX | IRTPRO 📈 Methods: MUPP | IRT (Rasch, 2PL, 3PL) | CTT | DIF | SEM | CFA/EFA 📑 Reporting: R Markdown | Quarto | Professional PDF/HTML Reports Let’s Build Something Meaningful Whether you're refining a single assessment or building a full testing system, I bring both the statistical expertise and the practical know-how to ensure your instruments are psychometrically sound and your data tells the right story.