Letty Koopman

Researcher | Methods & statistics | Psychometrics

[Letty Koopman @LettyKoopman]

Check out our feature in Quality of Life Research, in the special section on flexible, non-parametric measurement for patient-reported outcomes! https://t.co/gagc4TIcsq

[Letty Koopman @LettyKoopman]

Yes, two new publications online! Read all about standard errors of two-level scalability coefficients in Mokken scale analysis for multilevel data! https://t.co/KPa6y7zjGO & https://t.co/cHY5XHCrEg

[Letty Koopman @LettyKoopman]

Yeah, it's World Statistics Day!😃

[Letty Koopman @LettyKoopman]

Yes! Will be presenting at #IMPS2017 in Zürich this July! #TwoLevel #MokkenScaleAnalysis