RT Journal Article SR Electronic T1 VREX: An Open-Source Toolbox for Creating 3D Virtual Reality Experiments JF bioRxiv FD Cold Spring Harbor Laboratory SP 105858 DO 10.1101/105858 A1 Madis Vasser A1 Markus Kängsepp A1 Murad Magomedkerimov A1 Kälver Kilvits A1 Vladislav Stafinjak A1 Taavi Kivisik A1 Raul Vicente A1 Jaan Aru YR 2017 UL http://biorxiv.org/content/early/2017/02/03/105858.abstract AB Background We present VREX, a free open-source Unity toolbox for virtual reality research in the fields of experimental psychology and neuroscience.Results Different study protocols about perception, attention, cognition and memory can be constructed using the toolbox. VREX provides a procedural generation of (interconnected) rooms that can be automatically furnished with a click of a button. VREX includes a menu system for creating and storing experiments with different stages. Researchers can combine different rooms and environments to perform end-to-end experiments including different testing situations and data collection. For fine-tuned control VREX also comes with an editor where all the objects in the virtual room can be manually placed and adjusted in the 3D world.Conclusions VREX simplifies the generation and setup of complicated VR scenes and experiments for researchers. VREX can be downloaded and easily installed from vrex.mozello.com