- Latent trait estimation
- Reliability and measurement error analysis
- Validity and correlation structure
- Complex analysis of item functioning
- ... and more via add-on modules
SIA offers an interactive psychometric analysis of educational tests, psychological and health-related assessments, and other types of multi-item/multi-rater measurements.
SIA provides model equations, parameter estimates and their interpretation.
Several toy data sets are ready to use. You can also upload and analyze your own data.
All methods include sample R code which is ready to copy and paste into R and run locally.
SIA offers automatic generation of HTML and PDF reports.
The SIA team presented an Item Response Theory Workshop at the HBSC 2026 Spring Meeting in Prague, Czech Republic. Learn more about SIA workshops.
{ShinyItemAnalysis} has been updated to version 1.6.0!
SIA now supports ordinal IRT models and includes and improved data upload workflow.
See the changelog for a complete list of new features, improvements, and bugfixes. Learn more about the SIA software.
A manuscript on interactive SIA modules was published in Psychometrika. Explore more SIA publications.
Find more about SIA's news and updates.
{ShinyItemAnalysis} is a free software and you can redistribute it and or modify it
under the terms of the
GNU GPL 3.
When using the {ShinyItemAnalysis} software, we appreciate if you include a reference
in your publications. To
cite the software, please, use:
or
When using one of the SIA modules, please cite