Psychometrics · Research · Statistics · Psychology

The Science of Human Behavior, Measured.

A digital space at the intersection of psychological theory and empirical analysis — dedicated to psychometrics, quantitative methodology, and the psychology of the digital world.

About

I’m Giorgi Tchumburidze – Associate Professor of Psychology and head of the Psychology in the Digital World program at BTU (Business and Technology University) in Tbilisi, Georgia. My work focuses on educational assessment, psychometric validation, and large-scale studies like PISA, PIRLS, and TIMSS. This site is my professional home: a place for research, tools, and writing about the measurement of human behavior.

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65
Interactive Modules
56K
Lines of R Code
8
Topic Areas
3
ILSAs Covered

Current Research

PISA

Psychological Predictors of Reading Achievement

Evidence from PISA Georgia — examining how self-efficacy, growth mindset, and belonging predict reading literacy.

Digital Divide

Digital Divide 2.0

Combining PISA 2022 data with primary survey research to examine digital inequality among Georgian students.

Psychometrics

PSS-10 & Self-Efficacy Scale Validation

Psychometric validation of Georgian versions of the Perceived Stress Scale and General Self-Efficacy Scale.

Cultural Psychology

Cultural Life Scripts Replication

A 2026 replication of the 2016 Cultural Life Scripts study in the Georgian context.

Open Source Tool

Statistical Concepts Explorer

An interactive R Shiny application with 65 modules covering introductory statistics through advanced psychometrics. Built with ~56,000 lines of R code across 8 topic areas.

Explore SCE →
R CONSOLE
library(shiny)
library(mirt)
library(lavaan)
# 65 modules, 8 topics
# From descriptive stats
# to advanced IRT models
runApp(“SCE”)

Teaching

Psychology in the Digital World

A program at BTU exploring how digital technologies shape human cognition, behavior, and well-being. Courses cover research methodology, psychometrics, and the intersection of psychology with technology.

Research Methods Psychometrics PISA / PIRLS / TIMSS Digital Psychology

Latest from the Blog

Recent articles on psychometrics, R tutorials, research notes, and more.

  • Why I Run My Own Moodle And What I’m Building at courses.psycholo.ge
    When we talk about teaching and learning technology, most conversations circle around a few big names. Google Classroom is everywhere in schools. Coursera and edX dominate the online course market. Universities run their own learning management systems, often locked-down platforms … Read more
  • Computer Adaptive Testing: Why Modern Assessment Adapts to You
    Imagine a test where the questions you see depend on how well you’re doing. Get an item right, and the next item gets harder. Get it wrong, and the next one gets easier. The test calibrates itself to you, in … Read more
  • Item Writing – The Underrated Craft
    Every test, every scale, every measurement instrument in psychology and education starts with the same humble unit: the item. A single question, a single statement, a single decision point. Get the items right, and your measurement has a chance. Get … Read more