The invention relates to a method of analysing an emotional state of a user being provided with content information in a consumer electronics interface. The method comprises steps of: (210) obtaining physiological data indicating the user's emotional state; (230) identifying a part of the content information related to the physiological data; and (240) storing the physiological data with a reference to the related part of the content information. The invention also relates to a device, a data storage for storing physiological data, and to a computer program.