Chapter 3 56 The training group of 12 to 16 participants was split into two smaller groups of six to eight participants to train the VR scenarios in small units ensuring sufficient computing power. The two small groups underwent calibration of the VR suits and equipment together and then completed a 5-minute instruction and familiarization scenario in the system. Next, the first small unit (in the following referred to as Group 1) started the first VR scenario while the other small unit (in the following referred to as Group 2) had the option to view the scenario from the outside on a large screen. Once Group 1 finished the first VR sequence, the second group started their first VR sequence. While Group 2 prepared for the first training scenario, Group 1 received an after-action review with a police instructor on a large screen next to the VR station. Once Group 2 started the training scenario, Group 1 had the option to view the scenario from the outside on a large screen. Once Group 2 finished their VR SBT sequence, the groups would swap again, and Group 2 received the after-action review while Group 1 prepared for the next training scenario. This process was repeated until all participants completed three VR SBT scenarios. The VR scenarios depicted a large, square, multi-story building surrounded by parking lots and small streets, as can be seen in Figure 3.2. The participants’ task was to patrol around the building to spot suspicious behavior, engage perpetrators when necessary, and resolve any altercations accordingly. Various non-player characters (NPCs) with predetermined behaviors were placed in the scenarios and controlled by an operator from RE-liON who – under the guidance of an instructor – directed which threat would appear when and where. These on-thefly scenario variations allowed the adjustment of the level of complexity to the performance of the participants in the scenarios, ensuring that participants completed three slightly different VR scenarios, while keeping the overall structure and objective of the training the same for all participants. On average, one VR scenario lasted approximately six minutes. Figure 3.2. VR Training Environment. Note: The left picture shows the top-down layout of the VR training environment. The right picture shows the VR environment looking at the main entrance of the building. Pictures were provided by RE-liON.
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