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The objective of this study is to develop and use a virtual reality game as atool to assess the effects of realistic stress on the behavioral andphysiological responses of participants. The game is based on a popular Steamgame called Keep Talking Nobody Explodes, where the player collaborates withanother person to defuse a bomb. Varying levels of difficulties in solving apuzzle and time pressures will result in different stress levels that can bemeasured in terms of errors, response time lengths, and other physiologicalmeasurements. The game was developed using 3D programming tools includingBlender and virtual reality development kit (VRTK). To measure response timesaccurately, we added LSL (Lab Stream Layer) Markers to collect and synchronizephysiological signals, behavioral data, and the timing of game events. Werecorded Electrocardiogram (ECG) data during gameplay to assess heart rate andheart-rate variability (HRV) that have been shown as reliable indicators ofstress. Our empirical results showed that heart rate increased significantlywhile HRV reduced significantly when the participants under high stress, whichare consistent with the prior mainstream stress research. We furtherexperimented with other tools to enhance communication between two playersunder adverse conditions and found that an automatic speech recognitionsoftware effectively enhanced the communication between the players bydisplaying keywords into the player's headset that lead to the facilitation offinding the solution of the puzzles or modules. This VR game framework ispublicly available in Github and allows researchers to measure and synchronizeother physiological signals such as electroencephalogram, electromyogram, andpupillometry.

A Virtual Reality Game as a Tool to Assess Physiological Correlations of Stress