A method and a device for determining a reaction time of a vehicle driver of a vehicle includes a display device displaying at least one visual stimulus; and processing circuitry using a view recognition device to observe the direction of view of the vehicle driver, and determining the reaction time starting from the displaying of the visual stimulus, the reaction time corresponding to a specified time span if the direction of view of the vehicle driver is not recognized within the specified time span as running in the direction of the visual stimulus, or the reaction time corresponding to a time span in which the direction of view of the vehicle driver is recognized within the specified time span as running in the direction of the visual stimulus.