A Probit Multistate IRT Model With Latent Item Effect Variables for Graded Responses

We report how we determined our sample size, all data exclusions (if any), all data inclusion/exclusion criteria, whether inclusion/exclusion criteria were established prior to data analysis, all measures in the study, and all analyses including all tested models. If we use inferential tests, we report exact p values, effect sizes, and 95% confidence or credible intervals.

Open Data: I confirm that there is sufficient information for an independent researcher to reproduce all of the reported results, including codebook if relevant (Classe, 2022).

Open Materials: I confirm that there is sufficient information for an independent researcher to reproduce all of the reported methodology (Classe, 2022).

The supplementary material is available at https://osf.io/g3tsd/

Preregistration of Studies and Analysis Plans: This study was not preregistered.