1. A method comprising: outputting, by a computing device, for display at a display device, a graphical user interface; receiving, by the computing device, a plurality of indications of user interaction with the computing device; determining, by the computing device, a set of one or more time intervals between receiving at least two of the plurality of indications of user interaction with the computing device; determining, by the computing device and based at least in part on the set of one or more time intervals, a length of time to visually emphasize an alert in the graphical user interface; and visually emphasizing, by the computing device and for the length of time, the alert in the graphical user interface.