Clicker

A toy noisemaker. Animal trainers make use of the clickerClicker A toy noisemaker. Animal trainers make use of the clicker as an event marker to mark a desired response. The sound of the clicker is an excellent marker because it is unique, quick, and consistent. as an event markerEvent marker A signal used to mark desired behavior at the instant it occurs. The clicker is an event marker. to mark a desired response. The sound of the clicker is an excellent markerMarker Marker A signal used to mark desired behavior at the instant it occurs. The clicker is a marker.   because it is unique, quick, and consistent.