The Materials component contains files presenting details of the study procedures and measures.
1. Behnke et al SMI RSOS.pdf - the paper published in Royal Society Open Science that details initial motivations, hypothesis, and study procedures.
2. PCI_RR_SMI_Esports_Supplementary_Materials.docx - the supplementary materials for the initial paper that details the study procedures (e.g., Polish and English versions of questionnaires used, and SMI and Control intervention transciripts).
More materials related to the Stage 1 and Stage 2 of project preregistration are avalialble here: https://osf.io/wsg28/