for example, information acquisition, the first step in information processing, is the process by which a user registers input via the senses. an automated engine gauge might assist the user with information acquisition through simple interface features—such as highlighting changes in the engine's performance—thereby directing the user's selective attention. when faced with issues originating from an aircraft, pilots may tend to overtrust an aircraft's engine gauges, losing sight of other possible malfunctions not related to the engine. this attitude is a form of automation complacency and misuse. if, however, the pilot devotes time to interpret the engine gauge, and manipulate the aircraft accordingly, only to discover that the flight turbulence has not changed, the pilot may be inclined to ignore future error recommendations conveyed by an engine gauge—a form of automation complacency leading to disuse.