RBT Exam Prep
15 Free RBT Measurement Practice Questions with Answers
Work through all 15 questions below, then open “Answer and explanation” under each one to check yourself. These go deeper than the main practice test: rate math, whole-interval recording, interobserver agreement, and reading graphs.
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Rate
During a 60-minute session, an RBT counts 24 instances of hand-raising. The rate of hand-raising is:
- A) 0.4 per minute
- B) 24 per minute
- C) 36 per hour
- D) 2.5 per minute
Answer and explanation
Correct answer: A
A is correct. Rate equals count divided by time: 24 divided by 60 equals 0.4 per minute. B is wrong. It skips the division by time entirely. C is wrong. Twenty-four occurrences in 60 minutes is 24 per hour, not 36. D is wrong. It inverts the division.
Source: BACB RBT Test Content Outline (3rd ed.), Measurement (C); RBT Handbook.
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Discontinuous measurement
Using 10-second intervals, the RBT scores an interval as an occurrence only if hand-flapping lasts the entire 10 seconds. This is:
- A) Whole-interval recording
- B) Partial-interval recording
- C) Momentary time sampling
- D) Frequency recording
Answer and explanation
Correct answer: A
A is correct. Whole-interval recording requires the behavior to fill the entire interval to be scored. B is wrong. Partial-interval scores the interval if the behavior happens at any point in it. C is wrong. Momentary time sampling scores only what is happening at the exact end of the interval. D is wrong. Frequency counts every occurrence rather than sampling intervals.
Source: BACB RBT Test Content Outline (3rd ed.), Measurement (C); RBT Handbook.
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Continuous measurement
Frequency, duration, latency, and interresponse time are all examples of:
- A) Continuous measurement
- B) Discontinuous measurement
- C) Permanent products
- D) Indirect assessment
Answer and explanation
Correct answer: A
A is correct. Continuous measurement captures every instance of the behavior as it happens. B is wrong. Discontinuous measurement samples behavior across intervals, like partial-interval or momentary time sampling. C is wrong. Permanent products measure lasting outcomes, not the behavior itself. D is wrong. Indirect assessment gathers information by asking others.
Source: BACB RBT Test Content Outline (3rd ed.), Measurement (C); RBT Handbook.
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Trials to criterion
The RBT records how many teaching trials it takes before the client reaches 80% correct across two sessions. Counting trials until the criterion is met measures:
- A) Trials to criterion
- B) Latency
- C) Duration
- D) Rate
Answer and explanation
Correct answer: A
A is correct. Trials to criterion is the number of trials needed to reach the mastery standard. B is wrong. Latency is time from the cue to the start of the response. C is wrong. Duration is how long the behavior lasts. D is wrong. Rate is count per unit of time.
Source: BACB RBT Test Content Outline (3rd ed.), Measurement (C); RBT Handbook.
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Percent correct
In 20 discrete trials, the client responds correctly on 15. The percent correct is:
- A) 75%
- B) 35%
- C) 15%
- D) 80%
Answer and explanation
Correct answer: A
A is correct. Fifteen divided by 20 equals 0.75, or 75%. B is wrong. It subtracts instead of dividing. C is wrong. Fifteen is the raw count, not the percent. D is wrong. It rounds to a convenient but incorrect number.
Source: BACB RBT Test Content Outline (3rd ed.), Measurement (C); RBT Handbook.
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Graph components
On a line graph of a client’s tantrum data, the vertical (y) axis shows:
- A) The behavior measure, such as frequency or duration
- B) The dates or sessions
- C) The phase names
- D) The observer’s initials
Answer and explanation
Correct answer: A
A is correct. The y-axis shows the dependent variable, the behavior being measured, while the x-axis shows time in sessions or dates. B is wrong. Dates and sessions go on the horizontal x-axis. C is wrong. Phase names are labeled above the phases. D is wrong. Observer initials are never graphed.
Source: BACB RBT Test Content Outline (3rd ed.), Measurement (C); RBT Handbook.
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Reading graphs: level
In one phase, the data points hover around 8 per session. That typical value within the phase is called the:
- A) Level
- B) Trend
- C) Variability
- D) Latency
Answer and explanation
Correct answer: A
A is correct. Level is the average or typical value of the data within a phase. B is wrong. Trend is the direction the data are heading. C is wrong. Variability is how spread out the points are. D is wrong. Latency is the time from a cue to the start of a response.
Source: BACB RBT Test Content Outline (3rd ed.), Measurement (C); RBT Handbook.
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Reading graphs: trend
Across six sessions, tantrums go 12, 10, 8, 6, 4, 2. The data show a:
- A) Decreasing trend
- B) Increasing trend
- C) Stable level with no trend
- D) High variability
Answer and explanation
Correct answer: A
A is correct. A steady drop from session to session is a decreasing, or decelerating, trend. B is wrong. An increasing trend would rise instead of fall. C is wrong. The clear direction means there is a trend, not a flat level. D is wrong. Variability is about bounce, but these points move steadily downward.
Source: BACB RBT Test Content Outline (3rd ed.), Measurement (C); RBT Handbook.
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Reading graphs: variability
One week the data points are 4, 18, 2, 15, 6, 20. The points bounce widely, which means the data show high:
- A) Variability
- B) Level
- C) Trend
- D) Latency
Answer and explanation
Correct answer: A
A is correct. Variability is how much the data points differ from one another within a phase, and wide bouncing means high variability. B is wrong. Level is the average value. C is wrong. Trend is the overall direction. D is wrong. Latency is timing from cue to response.
Source: BACB RBT Test Content Outline (3rd ed.), Measurement (C); RBT Handbook.
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Baseline logic
The team collects two weeks of data on hitting before starting any teaching. This baseline matters because it:
- A) Shows what the behavior looked like before the intervention, so change can be judged
- B) Immediately reduces the behavior
- C) Replaces the need for a behavior plan
- D) Tells the team which reinforcer to use
Answer and explanation
Correct answer: A
A is correct. Baseline is the pre-intervention picture; without it the team cannot tell whether the intervention caused the change. B is wrong. Measuring a behavior does not treat it. C is wrong. Baseline informs the plan, it does not replace it. D is wrong. Reinforcers are identified with preference assessments.
Source: BACB RBT Test Content Outline (3rd ed.), Measurement (C); RBT Handbook.
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Interobserver agreement
Two RBTs observe the same 20 intervals. They agree on 18 and disagree on 2. Their interobserver agreement is:
- A) 90%
- B) 20%
- C) 36%
- D) 80%
Answer and explanation
Correct answer: A
A is correct. Interobserver agreement equals agreements divided by total intervals times 100: 18 divided by 20 equals 90%. B is wrong. It uses the disagreements instead of the agreements. C is wrong. It multiplies the wrong numbers. D is wrong. It is simply a low guess.
Source: BACB RBT Test Content Outline (3rd ed.), Measurement (C); RBT Handbook.
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Discontinuous measurement
Partial-interval, whole-interval, and momentary time sampling are most useful when the behavior:
- A) Happens so often that counting each occurrence is impractical
- B) Never happens
- C) Leaves a permanent product
- D) Happens exactly once per day
Answer and explanation
Correct answer: A
A is correct. Interval methods estimate high-rate behaviors that are too frequent to count continuously. B is wrong. Behavior that never happens needs no measurement system. C is wrong. Lasting outcomes are measured with permanent product recording. D is wrong. A once-daily behavior is easily counted with frequency.
Source: BACB RBT Test Content Outline (3rd ed.), Measurement (C); RBT Handbook.
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Duration
The RBT’s stopwatch shows the client cried for a total of 3 minutes during a 30-minute session. This reports:
- A) Total duration
- B) Latency
- C) Frequency
- D) Duration per occurrence
Answer and explanation
Correct answer: A
A is correct. Total duration adds up all the time the behavior occurred during the session. B is wrong. Latency is the time from a cue to the start of the response. C is wrong. Frequency counts occurrences. D is wrong. Duration per occurrence would be the average length of one crying episode.
Source: BACB RBT Test Content Outline (3rd ed.), Measurement (C); RBT Handbook.
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Rate
An RBT counts 30 hand flaps in 10 minutes. As a rate, this is:
- A) 3 per minute
- B) 30 per minute
- C) 300 per hour
- D) 0.33 per minute
Answer and explanation
Correct answer: A
A is correct. Thirty divided by 10 equals 3 per minute. B is wrong. It skips the division by time. C is wrong. Three per minute times 60 minutes is 180 per hour, not 300. D is wrong. It inverts the division.
Source: BACB RBT Test Content Outline (3rd ed.), Measurement (C); RBT Handbook.
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Graph components
On the line graph, the line that connects the data points from left to right is called the:
- A) Data path
- B) Phase change line
- C) X-axis
- D) Trend line
Answer and explanation
Correct answer: A
A is correct. The data path connects the plotted points in time order. B is wrong. The phase change line is the vertical dashed line between phases. C is wrong. The x-axis is the horizontal time axis itself. D is wrong. A trend line summarizes overall direction rather than connecting each point.
Source: BACB RBT Test Content Outline (3rd ed.), Measurement (C); RBT Handbook.
Sources
- BACB RBT Test Content Outline, 3rd edition (effective January 2026). Defines the exam domains; the Measurement questions on this page are drawn from domain C.
- BACB RBT Handbook. Covers eligibility, the 40-hour training, the Competency Assessment, supervision, and exam policies referenced in these explanations.
Not affiliated with or endorsed by the BACB.