Method for operating an infotainment device (20) of a vehicle, which has a selection module (22) for media pieces, which is designed to select media pieces from a set of predetermined media pieces for signaling by the infotainment device (20) depending on predetermined rules, in which - at least one physiological parameter is determined depending on at least one
biosignal of a vehicle user recorded with a predetermined sensor, which is recorded during and / or after the signalling of a selected piece of media, - for each of the physiological parameters determined, at least one characteristic feature is determined depending on the respective predetermined physiological parameter, wherein the at least one characteristic feature is determined depending on a time-based
signal curve of the physiological parameter and / or a frequency-based
signal curve of the physiological parameter, - depending on the characteristic features determined, an emotion rating from a predefined emotion rating range or from a set of predefined emotion rating classes is assigned to the selected media piece, - the determined characteristic features are compared with respective example instances of a set of given example instances, - depending on the comparison, the emotion rating is assigned to the signalled media piece, and - in which the emotion evaluation comprises a valence value or a valence class which characterises how pleasant the signalling of the media piece is perceived by the vehicle user, wherein the valence value or the valence class are available after a classification and the emotion evaluation is projectable onto a valence scale.