Publications

Pfadt, J. M., Molenaar, D., Hurks, P., & Sijtsma, K. (2026). A tutorial on estimating the precision of individual test scores for anyone constructing and using psychological tests. Psychometrika. https://doi.org/10.1017/psy.2026.10081

Pfadt, J. M., Bartoš, F., Godmann, H. R., Waaijers, M., Groot, L., Heo, I., Mensink, L., Nak, J., De Ruiter, J. P., Sarafoglou, A., Siepe, B. S., Arena, G., Akrong, E., Aust, F., van den Bergh, D., Brenner, W., Doekemeijer, R. A., Donzallaz, M. C., van Doorn, J., . . . Wagenmakers, E.-J. (2025). A methodological metamorphosis: The rapid rise of Bayesian inference and open science practices in psychology. PsyArXiv. https://doi.org/10.31234/osf.io/ck3js_v1
Mulder, J., & Pfadt, J. M. (2025). Going in the right direction: A tutorial to directional hypothesis testing using the BFpack module in JASP. PsyArXiv. https://doi.org/10.31234/osf.io/f582h_v1
Godmann, H. R., Molenaar, D., Ziegler, M., & Pfadt, J. M. (2025). A tutorial on assessing measurement invariance with moderated (non-)linear factor analysis in JASP. PsyArXiv. https://doi.org/10.31234/osf.io/6ftqg_v1
Mulder, J., Pfadt, J. M., & Wagenmakers, E.-J. (2025). A tutorial on Bayesian hypothesis testing of correlation coefficients using the BFpack-module in JASP. Behavior Research Methods, 57(11), 311. https://doi.org/10.3758/s13428-025-02846-5

Pfadt, J. M. (2023), The present and future of reliability analyis: Advances in theory and practice [Doctoral dissertation, Ulm University]. http://dx.doi.org/10.18725/OPARU-49700
Pfadt, J. M., van den Bergh, D., & Moshagen, M. (2023). Classical and Bayesian uncertainty intervals for the reliability of multidimensional scales. Structural Equation Modeling: A Multidisciplinary Journal, 30(3), 349–363. https://doi.org/10.1080/10705511.2022.2124162
Sijtsma, K., & Pfadt, J. M. (2023). Reliability. In R. Tierney, F. Rizvi, & K. Ercikan (Eds.), International encyclopedia of education (4th ed., pp. 21–34). Elsevier. https://doi.org/10.1016/B978-0-12-818630-5.10004-1

Pfadt, J. M., & Sijtsma, K. (2022). Statistical properties of lower bounds and factor analysis methods for reliability estimation. In M. Wiberg, D. Molenaar, J. González, J.-S. Kim, & H. Hwang (Eds.), Quantitative psychology: The 86th Annual Meeting of the Psychometric Society, virtual, 2021 (pp. 51–63). Springer International Publishing. https://doi.org/10.1007/978-3-031-04572-1_5
Pfadt, J. M., van den Bergh, D., Sijtsma, K., Moshagen, M., & Wagenmakers, E.-J. (2022). Bayesian estimation of single-test reliability coefficients. Multivariate Behavioral Research, 57(4), 620–641. https: //doi.org/10.1080/00273171.2021.1891855
Pfadt, J. M., van den Bergh, D., Sijtsma, K., & Wagenmakers, E.-J. (2022). A tutorial on Bayesian single-test reliability analysis with JASP. Behavior Research Methods, 55(3), 1069–1078. https://doi.org/10.3758/s13428-021-01778-0

Sijtsma, K., & Pfadt, J. M. (2021a). Part II: On the use, the misuse, and the very limited usefulness of Cronbach’s alpha: Discussing lower bounds and correlated errors. Psychometrika, 86(4), 843–860. https: //doi.org/10.1007/s11336-021-09789-8
Sijtsma, K., & Pfadt, J. M. (2021b). Rejoinder: The future of reliability. Psychometrika, 86(4), 887–892. https://doi.org/10.1007/s11336-021-09807-9

A Bayesian Spectacles blog post presenting the preprint of “Bayesian estimation of single-test reliability coefficients”. https://www.bayesianspectacles.org/preprint-bayesian-estimation-of-single-test-reliability-coefficients/