Professionals with high pressure jobs such as police officers and military personnel often have to deal with difficult situations. In order to train such professionals to deal with their emotions and prevent possible anxiety disorders an ambient virtual training environment is being developed. This environment enables the trainee to deal with different scenarios and learn to appropriately regulate his/her emotions. An example of an emotion that can be experienced by emergency service workers is anger or distress caused by feelings of injustice. In this paper an experiment is presented that has as main goal to see whether it is possible to make the trainees feel unjustly treated in a virtual environment and to monitor their physiological response. © 2013 IEEE.