Continuous measurement
Continuous measurement records every occurrence of the target behavior during the entire observation period, using measures such as frequency, rate, duration, latency or interresponse time.
In continuous measurement, nothing is missed by design: the observer watches for the whole session and records each instance of the behavior. The measures in this family are frequency (count), rate, duration, latency and interresponse time. Because every instance is captured, continuous measurement gives the most complete picture of the behavior and is the standard against which sampling methods are judged.
The RBT uses the measure written in the behavior plan, not one they prefer. For a brief, countable behavior like hitting, the plan may call for frequency or rate. For an episode that varies in length, such as a tantrum, it may call for duration. For delays in starting tasks, it may call for latency. Each requires a clear operational definition with onset and offset so that each occurrence is recorded the same way.
The cost is effort. Continuous measurement requires the observer's full attention, which can be hard when the RBT is also teaching, managing materials and keeping the client safe, or when the behavior occurs at a very high rate. In those situations a supervisor may decide that a discontinuous method, such as momentary time sampling, gives a workable estimate.
Example and non-example
| Example | An RBT clicks a hand counter every time a student calls out without raising their hand during a 40-minute class, recording each occurrence for the whole period. |
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| Non-example | Marking a box only if a student is calling out at the instant a 1-minute timer beeps is momentary time sampling, a discontinuous method. |
Don't confuse it with
| Discontinuous measurement | Continuous measurement records every occurrence; discontinuous measurement samples part of the session and gives an estimate. |
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| Permanent product recording | Continuous measurement observes the behavior as it happens; permanent product recording measures the outcome left behind afterward. |
Test yourself
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Question 1Which of these is a continuous measurement procedure?
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C: Duration recording. Continuous measurement captures every occurrence of the behavior during the observation period. Duration recording times each occurrence from start to end, so nothing is missed; the interval and time-sampling procedures record only a sample.
- A: Partial interval recording only notes whether the behavior happened at some point in each interval, so it samples the behavior.
- B: Momentary time sampling checks the behavior only at the moment each interval ends.
- D: Whole interval recording only notes whether the behavior lasted through each entire interval.
Task A.1 · 40-hour curriculum section C
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Question 2What makes a measurement procedure continuous?
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B: Every occurrence during the observation period is recorded. In continuous measurement the observer captures every instance of the target behavior for the whole observation period. Frequency, duration, latency and interresponse time recording are all continuous procedures.
- A: Checking only at the end of each interval is momentary time sampling, a discontinuous procedure.
- C: Marking an interval once, no matter how many times the behavior happens in it, is partial interval recording, which samples behavior.
- D: Measuring the lasting results of behavior after the fact describes permanent product recording, not what makes a procedure continuous.
Task A.1 · 40-hour curriculum section C
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Question 3During a 45-minute small-group lesson, an RBT makes a tally mark each time a 9-year-old raises their hand to answer. Which measurement procedure is the RBT using?
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C: Frequency recording. Making a mark for every occurrence of a behavior is frequency (count) recording, also called event recording. It suits hand raising because each raise has a clear start and end.
- A: Duration recording would time how long each hand raise lasts rather than count them.
- B: Latency recording would time how long the student takes to respond after a cue.
- D: Whole interval recording would mark only intervals in which the hand stayed up the entire time.
Task A.1 · 40-hour curriculum section C
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On the RBT exam
This term belongs to task A.1 Continuous measurement in content area A, Data Collection and Graphing, which is 13 of the 75 scored questions.