"...ILSAs are—and should be—here to stay. They can serve as powerful instruments of change, although the nature and extent of their influence varies by country and over time" - Singer & Braun (2018). Read article here: science.sciencemag.org/content/360/63…

Looking forward to the next two days #FREMO2018

Tyler Matta, @lrutkowski, David Rutkowski, Linda Liaw present an article that provides an overview of the R package 'lsasim', designed to facilitate the generation of data that mimics a large scale assessment context. link.springer.com/content/pdf/10…

For more updates about the Embracing Heterogeneity Project, please visit: embracingheterogeneity.com

Happy New Year. Thank you all for being with us through 2018. We hope that in 2019 you will continue to grow with us.

Researchers take on effectiveness of international assessments in latest project. education.indiana.edu/news-events/_n… via IU School of Education Bloomington

An article by @lrutkowski, Svetina & Linda Liaw provides evidence of artifactual fit improvement, pointing to the possibility of data dredging for improved model-data consistency in challenging invariance contexts with large numbers of groups. scholarworks.iu.edu/dspace/handle/…

Thanks to our international panel from Chile, Croatia, Denmark and Italy for their interesting #ICCS perspectives at #IEAIRC iea.nl/studies/iea/ic…

@lrutkowski presenting about multistage testing and the future of international education assessments #IEAIRC IEA - Education

@lrutkowski and Dubravka Svetina giving a nice presentation IEA - Education #IEAIRC on MST designs in ILSAs

Join the Improving ILSA team as they give their symposium, "The future of international assessment? The promise and challenge of a multistage design in IEA studies" at IEA - Education IRC 2019.

First paper presented was entitled, "Parameter estimation stability and probabilistic routing in MST" by @lrutkowski and David Rutkowski

Item parameter desirable properties - higher slopes are always better?, asks Dubravka Svetina in her presentation entitled, "Module length and routing methods in MST."

The next presentation at the sympsium is enttled, "Differential item functioning in MST" by Montesrrat Valdivia, @lrutkowski and David Rutkowski

Last presentation at the symposium entitled, "On test taking motivation in MST" presented by Linda Liaw (with @lrutkowski and davidru as co-authors).

.@lrutkowski presenting her #IEACompass brief written with David Rutkowski on the pervasive problem of school bullying #TIMSS #IEAIRC iea.nl/publications/s…

"Is democracy overrated? Latin American students’ support for dictatorships" a presentation by Improving ILSA partner Andres Sandoval-Hdez from the University of Bath at the symposium on IEA Compass: Briefs in Education series #IEAIRC

"No one likes a bully: How systematic is international bullying in fourth grade?" say @lrutkowski and David Rutkowski at the symposium on IEA Compass: Briefs in Education series #IEAIRC.

A new blog post outlines how you can obtain comparable item parameter estimates in PARSCALE, mirt, and TAM for two-parameter IRT model. And, specifying item parameters for lsasim. embracingheterogeneity.github.io/website/01a_LR…

Convenience sampling can introduce systematic bias into the estimates in simulation. An example is demonstrated in this blogpost by generating a background questionnaire and cognitive response in lsasim and then fitting latent regression model in TAM. embracingheterogeneity.github.io/website/02_LR.…