An apparatus configured to control a user situation awareness modification of a user of a vehicle, which includes input module configured to repeatedly receive a first event detection signal comprising information related to a detected event outside a vehicle and to repeatedly receive a first user detection signal comprising information related to a reaction or a missing reaction of a user to the detected event outside the vehicle. The apparatus further includes a processing module configured to determine a user situation awareness level based on the information related to the detected event outside the vehicle and the information related to the reaction of the user to the detected event, and to generate a control signal configured to control a user situation awareness modification module based on the determined user situation awareness level.