These electroencephalography (EEG) data files were collected in a virtual T-maze paradigm. Here we provide an example dataset that was recorded during a student research project and that was used as example files for the EPOS pipeline (https://osf.io/cw5qv/). The EEG data was collected using brainvision recorder (BrainVision Analyzer, Version 2.2.0, Brain Products GmbH, Gilching, Germany) and Brainvision BrainAmp with 64 Channels. It comprises 8 minutes of resting EEG, training sessions before the virtual T-maze task, the virtual T-maze task and partly also the rating sessions after the virtual T-maze. This sample dataset was chosen for demonstration EPOS as this chain has be developped to investigate event related frequency responses in datasets with trials from 13 seconds up to 20 seconds duration, including joystick movement artifacts. The data collection was carried out in accordance with the recommendations of the “Ethical guidelines, The Association of German Professional Psychologists” (“Berufsethische Richtlinien, Berufsverband Deutscher Psychologinnen und Psychologen”) with written informed consent from all subjects. All subjects gave written informed consent in accordance with the Declaration of Helsinki before they participated in the experiment. The protocol was approved with the file reference GZEK-2017-18 by the local ethics committee of the department of psychology of the Julius-Maximilians-University of Würzburg (Ethikkommission des Institutes für Psychologie der Humanwissenschaftlichen Fakultät der Julius-Maximilians-Universität Würzburg). For additional information about the virtual T-maze, please see the following references: Rodrigues, J. (2016). Let me change your mind… Frontal brain activity in a virtual T-maze. https://opus.bibliothek.uni-wuerzburg.de/frontdoor/index/index/docId/14328 Rodrigues, J., Allen, J. J. B., Müller, M., & Hewig, J. (2021). Methods matter: An examination of factors that moderate predictions of the capability model concerning the relationship of frontal asymmetry to trait measures. Biological Psychology, 158, 107993. https://doi.org/10.1016/j.biopsycho.2020.107993 Rodrigues, J., Müller, M., & Hewig, J. (2020). Cardiac defensive reactions and orienting responses correspond to virtual withdrawal behavior choices in a virtual T-maze. International Journal of Psychophysiology, 158, 73–85. https://doi.org/10.1016/j.ijpsycho.2020.08.010 Rodrigues, J., Müller, M., Mühlberger, A., & Hewig, J. (2018). Mind the movement: Frontal asymmetry stands for behavioral motivation, bilateral frontal activation for behavior. Psychophysiology, 55(1), e12908. https://doi.org/10.1111/psyp.12908 Rodrigues, J., Ziebell, P., Müller, M., & Hewig, J. (2020). Tell me what I told you Mini-Me: Constructing and providing a two layer feedforward networks for behavioral classification of continuous data. https://doi.org/http://dx.doi.org/10.23668/psycharchives.4199