Discontinuous measurement records behavior for only part of the time instead of every instance. It is useful when counting every occurrence is impractical.
The three common methods
- Partial-interval recording: mark the interval if the behavior occurred at any point in it. This tends to overestimate the behavior.
- Whole-interval recording: mark the interval only if the behavior occurred for the entire interval. This tends to underestimate it.
- Momentary time sampling: mark whether the behavior is occurring at the exact moment the interval ends.
Discontinuous vs. continuous
Continuous measurement, such as frequency, duration and latency, captures every instance. Discontinuous measurement gives an estimate but takes less effort.
Exam tip
Match the wording to the method: “at any point” means partial, “throughout” means whole, and “at the end of the interval” means momentary time sampling.
Keep studying
RBT glossary · Study guide · Flashcards
Independent study resource, not affiliated with the BACB or Pearson VUE.
Common mistake
Choosing a method without matching it to the behavior and the data goal.
Quick check
Which method marks an interval only at its very end? Momentary time sampling.
Key term explainers
Partial-interval recording · Whole-interval recording · Momentary time sampling