1.
Scree plots for COVID Stress Scales item factor analyses in the Polish and Dutch samples.
2.
Descriptive and cross-language comparison of the original CSS item scores and the CSS-PL_EX in the study 1 with bilingual participants.
Results from COVID Stress Scale item response models with parameter constraints across times 1 and 2 supported by DIF tests.
Results from COVID Stress Scales item response models with parameter constraints across Polish and Dutch samples supported by measurement invariance tests.