Statistical methods
MCPower — Monte Carlo Power Analysis
Simple Monte Carlo power analysis for complex models. Find the sample size you need or check if your study has enough power — even with complex models that traditional power analysis can’t handle. Available as a Python package and a standalone desktop app.
MCPower GUI — Desktop Application
Standalone desktop app for Monte Carlo power analysis — no Python required. Point-and-click interface for defining models, running simulations, and viewing results. Available for Windows, Linux, and macOS.
Likelihood Ratio Test for Publication Bias
A statistical method designed to detect and quantify publication bias in datasets of heterogeneous studies results.
Metascience
Society for Open Science
Founder and the board member. Association's goal is to promote collaboration, transparency, and increase the potential for research results to be used by a wide range of audiences: scientists, educators, NGOs, industry, and the general public. A key value for us is a transparent and critical methodology that enables research to be replicated and verified, thus increasing its credibility.
Estimating Replicability of Polish Psychology
Estimating Replicability of Polish Psychology is a study on the impact of higher education reform and the Publish-or-Perish phenomenon on questionable research practices, along with a comparison/ranking of psychology institutes and departments in terms of publication bias.
CATS Conference
An innovative idea of an interdisciplinary, metascientific conference where discussions and individual, constructive feedback are paramount. A conference, where people from all academic levels gather in one space to discuss the challenges in conducting scientific research.
Methodological challenges in psychedelic-assisted therapy research for substance use disorders
(Preregistration) This scoping review aims to systematically map and synthesize the existing reviews and meta-analyses on methodological challenges in psychedelic-assisted therapy research for substance use disorders and addiction treatment.
ReproducibiliTea – Warsaw
It was a series of seminar meetings conducted in the ReproducibiliTea format, which aimed at introducing the concept of Open Science to both students and anyone interested in science. In this case, it also aimed to diagnose the problems that the Open Science movement, both in Poland and worldwide seeks to address.
Other
Plisiecki, H., Lenartowicz, P., Pokropek, A., Małyska, K., & Flakus, M. (2025). Measuring Individual Differences in Meaning: The Supervised Semantic Differential. PsyArXiv. https://doi.org/10.31234/osf.io/gvrsb_v1
Plisiecki, H., Lenartowicz, P., Flakus, M. et al. High risk of political bias in black box emotion inference models. Sci Rep 15, 6028 (2025). https://doi.org/10.1038/s41598-025-86766-6