Central Reach Institute 40 Hour RBT Training Practice Test

Whole interval recording counts a behavior only when it is observed for the entire interval. If the interval runs for a set duration, the behavior must be present for every moment of that interval to be recorded as an occurrence. This makes the method good for showing sustained engagement or duration, but it often undercounts when the behavior is brief or sporadic because partial occurrences don’t meet the full-interval criterion. In contrast, momentary time sampling checks the behavior at a specific moment, usually at the end of the interval, which can miss many occurrences. Partial interval recording flags the behavior if it happens at any time during the interval, which tends to overestimate how much the behavior occurs. Event recording simply tallies each instance of the behavior, regardless of how long it lasts or how it fits into intervals.