This illustration is intuitive and we expect this tool to improve performance during the gameplay and
also believe that it can result in reduced stress which can be measured by the HRV values. Further
experiments and studies with multiple subjects are required to quantify our measurements and verify
this conjecture.
5 Conclusions and Next Steps
In conclusion, we created a VR GWAP framework based on the game "Keep Talking and Nobody
Explodes" intending to relate physiological data and stress levels. The framework includes event
markers so that the physiological, behavioral, and audio data streams and events in the game are totally
synchronized. We used ECG to show how this VR GWAP can be used to assess the physiological
correlates of stress. The empirical results were consistent with those reported in prior studies that the
HRV values decrease with increasing levels of stress (9; 16; 21; 22).
Our game is meant to be a framework for experimentation so that other researchers can add more
tools or sensors. We used ECG to measure heart rate variability as it is known to be correlated with
stress. However, this framework can be extended to sensors such as electroencephalogram (EEG)
to measure brain activities that are correlated with stress, or eye gaze/pupillometry to find other
physiological correlates of stress. This framework also allows a thorough investigation into the speech
characteristics of players under stress, for example, to extract features such as pitch or loudness. We
believe that this framework can facilitate further research on the connection between physiological
signals and stress (and other mental and cognitive states).
Acknowledgments
This work was supported in part by grants from US NSF (CBET-1935860, NCS-1734883, IP-1719130,
and SMA-1540943) and US Army Research Lab STRONG Program to TPJ. The authors want to
thank Robin Xu for helping with the VR game code and Kuanjung Chiang for helping with the Data
Analysis in MATLAB.
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