This project contains supplementary material to the paper: Hohol, M., Wołoszyn, K., & Cipora, K. (2022). No fingers, no SNARC? Neither the finger counting starting hand, nor its stability robustly affect the SNARC effect. *Acta Psychologica*, *230*, 103765. https://doi.org/10.1016/j.actpsy.2022.103765 It contains: - A copy of the as.predicted preregistration document - Finger counting questionnaire - original version in Polish - Finger counting questionnaire - English translation - Data analysis script allowing to reproduce the analysis reported in the paper from the aggregated datafile - Aggregarted datafile - Folder containing: (a) raw datafiles; (b) r script for aggregating the data and calculatign the SNARC; (c) script for calculating the reliability of the SNARC effect The experimental procedure is available at https://app.gorilla.sc/openmaterials/461468 Additionally, we share a poster presenting this work on the Mathematical Cognition and Learning Society conference in Antwerp, Belgium, 2022.