Audio ERP by ShiJbey - 1

AudioVR & AR

Unity VR Environment for testing P300 ERP Paradigms

Unity 2018.2.6f1Unknown LicenseUpdated 90 days agoCreated on March 19th, 2018
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Event Related Potentials for Virtual Reality Interactions

Screenshot of VR apartment

This Unity project contains a testing environment for collecting EEG data via LSL while the participant is immersed in the VR environment.

Testing Check List

The following are the instructions I used when collecting data using an HTC Vive headset and a BrainProducts Acticap/V-amp with dry electrodes.

HTC Vive Setup

  1. Follow normal HTC vive set hardware setup
  2. For my tests, since participants were seated, I configured steamVR for standing-only

EEG Setup and LSL Check

  1. Plug in the VAmp to the computer via USB
  2. Start the Vamp.exe LabStreamingLayer application
  3. Check that the app has all the options you want selected (default selections should be fine)
  4. Click Link
  5. Now, within Unity you while the game is playing, you should be able to connect to LSL under the options menu.

Sound Check

  1. The ‘1’, ‘2’, and ‘3’ keys all map to sounds and can be used to test the stimuli volue prior to starting tests
  2. Always check to make sure that sounds are not too loud and that participants are comfortable

Experimenter Script

The script for briefing the participant on their task can be found in the experimenter_script.txt file

EEG Channels

This is the channel configuration I used with the BrainVision Acticap Express and V-Amp hardware.

Channel # Cap Position 10-20 Positiion
1 29 Fp1
2 F3
3 17 Cz
4 13 Cp1
5 11 P3
6 7 Pz
7 Po3
8 3 O1
9 30 Fp2
10 F4
11 12 Cpz
12 14 Cp2
13 10 P4
14 4 Poz
15 Po4
16 2 O2

Warnings:

  • When developing or testing on a non VR capable computer, ignore errors related to ‘XR’ or ‘OpenVR’. Scenes that do not contain VR specific assets should still be able to run without problems.
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