A method for determining an information source from a plurality of information sources for display on data spectacles, wherein the data spectacles comprise a camera; wherein the method comprises: determining the spatial orientation of the data spectacles; determining a criterion from a plurality of criteria, each relating to the spatial orientation of the data spectacles, which is satisfied by the determined spatial orientation of the data spectacles; wherein each criterion is assigned an information source; selecting the information source that is assigned to the determined criterion; and wherein the determination of the spatial orientation comprises the following: receiving a photograph taken by the camera; identifying an image of part of the interior of a vehicle in the photograph; determining the position of the image or part of the image in the photograph; determining the spatial orientation of the data spectacles on the basis of the determined position of the image or part of the image in the photograph; wherein the plurality of information sources comprises: a video camera, which is directed in the direction of travel of the vehicle or to the side or upwardly, and an information processing means, which is designed to output physical measurement values of the state of the vehicle, more especially the speed of the vehicle, the rotational speed of a drive of the vehicle, the power output of the drive of the vehicle, or the fill level of the energy store of the vehicle. determining the spatial orientation of the data spectacles; determining a criterion from a plurality of criteria, each relating to the spatial orientation of the data spectacles, which is satisfied by the determined spatial orientation of the data spectacles; wherein each criterion is assigned an information source; selecting the information source that is assigned to the determined criterion; and wherein the determination of the spatial orientation comprises the following: receiving a photograph taken by the camera; identifying an image of part of the interior of a vehicle in the photograph; determining the position of the image or part of the image in the photograph; determining the spatial orientation of the data spectacles on the basis of the determined position of the image or part of the image in the photograph; wherein the plurality of information sources comprises: a video camera, which is directed in the direction of travel of the vehicle or to the side or upwardly, and an information processing means, which is designed to output physical measurement values of the state of the vehicle, more especially the speed of the vehicle, the rotational speed of a drive of the vehicle, the power output of the drive of the vehicle, or the fill level of the energy store of the vehicle. receiving a photograph taken by the camera; identifying an image of part of the interior of a vehicle in the photograph; determining the position of the image or part of the image in the photograph; determining the spatial orientation of the data spectacles on the basis of the determined position of the image or part of the image in the photograph; wherein the plurality of information sources comprises: a video camera, which is directed in the direction of travel of the vehicle or to the side or upwardly, and an information processing means, which is designed to output physical measurement values of the state of the vehicle, more especially the speed of the vehicle, the rotational speed of a drive of the vehicle, the power output of the drive of the vehicle, or the fill level of the energy store of the vehicle. a video camera, which is directed in the direction of travel of the vehicle or to the side or upwardly, and an information processing means, which is designed to output physical measurement values of the state of the vehicle, more especially the speed of the vehicle, the rotational speed of a drive of the vehicle, the power output of the drive of the vehicle, or the fill level of the energy store of the vehicle.