METERING USER BEHAVIOUR AND ENGAGEMENT WITH USER INTERFACE IN TERMINAL DEVICES

The invention concerns an electronic terminal device with a processing device, a display, a user input element, a memory entity for storing the instructions and other data, and a communication interface for transferring data with external entities, configured, to store a number of digital content fingerprints that each correspond to a usage of display content, whereby log data is generated and recorded comprising behavioral data indicative of user engagement with the electronic terminal device, matches between the stored digital content fingerprints and display content are searched for and detected, and indications of such matches are detected stored in the log data, wherein a selected control action is executed concerning the generation and recording of the log data according to a determined usage status of the UI. The invention also concerns a system for collecting and processing data provided by multiple terminals associated with a plurality of users, and related methods.