An Open Source Virtual Reality Training Framework for the Criminal Justice System

We developed an open-source training framework to practice conversation skills in a controlled and immersive virtual reality (VR) environment. Virtual characters with different biographies were developed with which a conversation using natural language is possible. The virtual characters integrate a dialog management system (ChatScript) to provide different biographical memories. Natural language processing for the German language is integrated by using Kaldi, an open-source speech recognition toolkit. As the framework allows for interchangeable content there are many different possible application cases to apply within the criminal justice system. The VR frameworks code is available under an open-source license. In this article, an overview of the framework's functionality is given as well as an outlook on possible areas of application. Statements about user acceptance and usability cannot yet be made, as relevant data have first to be gathered through a concrete application case.