# A Virtual Reality Soldier Simulator with Body Area Networks for Team Training
## 6 Experimental Results
### Simulated Training Performance  
Figure 18 shows a snapshot of the proposed system. All three individual participants, who had done the same military training at the actual training site, successfully completed the rescue mission, with times of \(22^{\prime}16^{\prime\prime}\), \(25^{\prime}40^{\prime\prime}\), \(28^{\prime}51^{\prime\prime}\), respectively (mean = \(25^{\prime}36^{\prime\prime}\), standard deviation = \(3^{\prime}18^{\prime\prime}\)). However, of the three participants who had never done the same training and started the mission individually, only one participant completed the rescue mission, with a time of \(36^{\prime}59^{\prime\prime}\), and the other two participants were killed by enemies before completing the rescue task. The three two-man teams who had been trained in the live situation completed the rescue mission with times of \(11^{\prime}28^{\prime\prime}\), \(18^{\prime}19^{\prime\prime}\), \(16^{\prime}5^{\prime\prime}\), respectively (mean = \(15^{\prime}17^{\prime\prime}\), standard deviation = \(3^{\prime}30^{\prime\prime}\)). However, the three two-man teams who had never done the same training also completed the rescue mission, with times of \(25^{\prime}19^{\prime\prime}\), \(28^{\prime}33^{\prime\prime}\), \(26^{\prime}12^{\prime\prime}\), respectively (mean = \(26^{\prime}41^{\prime\prime}\), standard deviation = \(1^{\prime}40^{\prime\prime}\)). Finally, the three-man team that had live training experience completed rescue mission with a time of \(7^{\prime}49^{\prime\prime}\). On the other hand, the three-man team that had never done the same training completed the rescue mission with a time of \(13^{\prime}47^{\prime\prime}\). The results of experienced and unexperienced participants' mean times in the experiment are shown in Figure 19. We also evaluated another situation, in which two subjects in the three-man groups completed the mission without the VoIP communication function. The mean time in this experiment increased by \(1^{\prime}26^{\prime\prime}\) (Figure 20), which implies that communication and information processing can improve the performance for rescue missions.  
Finally, we evaluated a six-man team of all participants in the rescue task, because standard deployment for a real live mission is a six-man entry team. The mission time decreased by \(2^{\prime}28^{\prime\prime}\) with respect to the three-man experiment with experienced participants. The experimental results for mean times with different numbers of participants are shown in Figure 21. In addition, death rate (hit rate) revealed another difference between single and multiple participants. From the results, the mean of death rate (hit rate) was \(1.5\) shots/per mission when a single participant interacted with the system. However, the mean of death rate decreased to \(0.38\) shots/per mission when multiple participants interacted with the system.  
Figure 18: Snapshot of the system.  
Figure 21: Mean times with different numbers of participants under the experimental conditions (horizontal axis: number of participants; vertical axis unit: seconds).  
Figure 19: Means of experienced participants and unexperienced participants under various experimental conditions (horizontal axis: single-man, two-man, three-man; vertical axis unit: seconds).  
Figure 20: Mean of three-man teams with voice communication/without voice communication under the experimental conditions (horizontal axis: experienced/unexperienced participants; vertical axis unit: seconds).