In certain interfaces, it is necessary to inform users of an abnormal condition or time-dependent information. It is important that the display of this information catches the user's attention. Suggest five ways a designer can successfully attract attention.

What will be an ideal response?

Consider an air traffic control system operator display with an alert condition of two planes being too close to each other. One can alert an operator by changing the color displayed for the plane’s identification information, using a warning that pops-up, using a warning that flashes on/off, an audible beep, or a constant audio alarm. Certainly usability testing these proposed solutions with real air traffic controllers so designers can trade-off successfully attracting the attention of the operator vs. causing one to totally lose their train of thought and make conditions worse.