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An intervalometer is usually a handheld device with a long cord that plugs into a cameraâs auxiliary port. It looks and works very similar to a remote trigger release. The type of intervalometer youâll need depends on your type of camera.
Interval recording is a shortcut procedure for estimating the duration of a behavior. In this method, the teacher periodically looks at the student at predetermined (NOT spontaneously selected) intervals and records whether the behavior is occurring. There are three types of interval recording.