title: VREX: an open-source toolbox for creating 3D virtual reality experiments.
abstract: 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.
authors.affiliation: Institute of Computer Science, University of Tartu, Tartu, Estonia. madis.vasser@ut.ee.
authors.forename: Madis
authors.identifier: http://orcid.org/0000-0001-5239-1099
authors.initials: M
authors.lastname: Vasser
authors.affiliation: Institute of Computer Science, University of Tartu, Tartu, Estonia.
authors.forename: Markus
authors.initials: M
authors.lastname: Kängsepp
authors.affiliation: Institute of Computer Science, University of Tartu, Tartu, Estonia.
authors.forename: Murad
authors.initials: M
authors.lastname: Magomedkerimov
authors.affiliation: Institute of Computer Science, University of Tartu, Tartu, Estonia.
authors.forename: Kälver
authors.initials: K
authors.lastname: Kilvits
authors.affiliation: Institute of Computer Science, University of Tartu, Tartu, Estonia.
authors.forename: Vladislav
authors.initials: V
authors.lastname: Stafinjak
authors.affiliation: Institute of Psychology, University of Tartu, Tartu, Estonia.
authors.forename: Taavi
authors.initials: T
authors.lastname: Kivisik
authors.affiliation: Institute of Computer Science, University of Tartu, Tartu, Estonia.
authors.forename: Raul
authors.initials: R
authors.lastname: Vicente
authors.affiliation: Institute of Computer Science, University of Tartu, Tartu, Estonia.|Institute of Public Law, University of Tartu, Tartu, Estonia.
authors.forename: Jaan
authors.initials: J
authors.lastname: Aru
mesh_terms: D001288:Attention / Q000502:physiology*; D003071:Cognition / Q000502:physiology*; D003198:Computer Simulation; D006801:Humans; D008568:Memory / Q000502:physiology*; D009488:Neurosciences; D010465:Perception / Q000502:physiology*; D011584:Psychology; D012984:Software; D065855:Spatial Processing / Q000502:physiology; D014584:User-Computer Interface
keywords: Attention; Change blindness; Memory; Spatial perception; Toolbox; Virtual reality