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RBT study materials
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RBT practice questions

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Question 1Measurement

A teacher wants to know how many times a student leaves their seat during a 30-minute lesson. Which measurement procedure is most appropriate?

  1. Momentary time sampling at 5-minute marks
  2. Event recording of each occurrence Correct answer.
  3. Duration recording of each occurrence
  4. Latency recording from lesson start

Explanation

Event recording (frequency counting) tallies each instance of a discrete behavior and is used when the behavior has a clear beginning and end. Counting each instance directly answers the teacher's question about how many times the behavior occurred.

Question 2Measurement

Which measure captures the total amount of time a learner engages in a behavior from its onset to its offset?

  1. Latency to the first response
  2. Total duration of the behavior Correct answer.
  3. Interresponse time between episodes
  4. Rate of responding per minute

Explanation

Duration recording starts a timing device when the behavior begins and stops it when the behavior ends, producing the length of each episode. Summing episodes gives total duration, the dimension of time engaged in behavior.

Question 3Measurement

A teacher says "please sit down" and starts a stopwatch, stopping it when the student is seated. Which measure is being recorded?

  1. Response latency Correct answer.
  2. Duration of the request
  3. Rate of compliance
  4. Interresponse time

Explanation

Latency is the elapsed time between the presentation of a stimulus or instruction and the beginning of the response. Here the stopwatch runs from the instruction to the initiation of sitting, which is latency to respond.

Question 4Measurement

Which is the best example of permanent product recording?

  1. Timing tantrums with a stopwatch
  2. Tallying every hand raise during a lesson
  3. Counting finished worksheets left in the tray Correct answer.
  4. Marking intervals in which behavior occurred

Explanation

Permanent product recording measures the tangible outcome or residue the behavior leaves behind, which can be examined after the behavior has ended. Completed worksheets are a physical product that can be counted without observing the behavior as it happens.

Question 5Measurement

In partial-interval recording, an interval is scored as an occurrence when the behavior:

  1. occurred at least once before the interval began
  2. is occurring at the final second of the interval
  3. occurs at any point during the interval Correct answer.
  4. occurs for the entire length of the interval

Explanation

Partial-interval recording scores an interval if the behavior occurs at least once at any moment within that interval, regardless of how long it lasts. It therefore captures brief or sporadic occurrences within the interval.

Question 6Measurement

Compared with continuous direct observation, whole-interval recording tends to:

  1. underestimate how often the behavior occurs Correct answer.
  2. match the true value exactly
  3. have no consistent relationship to the true value
  4. overestimate how often the behavior occurs

Explanation

Whole-interval recording scores an interval only when the behavior persists for the entire interval, so any interval containing brief or interrupted behavior is scored as no occurrence. This systematically produces lower estimates than continuous measurement.

Question 7Measurement

A staff member watches a client only at the last moment of each 5-minute interval and records whether the behavior is happening right then. This is:

  1. partial-interval recording
  2. event recording
  3. whole-interval recording
  4. momentary time sampling Correct answer.

Explanation

Momentary time sampling requires observing only at a specific instant, typically the end of each interval, and recording whether the behavior is occurring at that moment. Behavior at other points within the interval is not recorded.

Question 8Measurement

On a line graph, the horizontal axis (x-axis) usually represents:

  1. the dimension of behavior being measured
  2. the passage of time or successive sessions Correct answer.
  3. the number of responses per minute
  4. the percentage of intervals scored

Explanation

By convention the x-axis displays time, such as sessions, days, or dates, moving left to right. The behavior measure itself is plotted on the vertical axis.

Question 9Measurement

Observer A records 20 responses and Observer B records 18 responses in the same session. Using total count interobserver agreement, agreement is:

  1. 95%
  2. 80%
  3. 90% Correct answer.
  4. 111%

Explanation

Total count IOA divides the smaller count by the larger count and multiplies by 100. Here 18 divided by 20 equals 0.90, or 90% agreement.

Question 10Measurement

Two observers score the same 20 intervals and agree on 15 of them. Interval-by-interval interobserver agreement is:

  1. 75% Correct answer.
  2. 70%
  3. 80%
  4. 85%

Explanation

Interval-by-interval IOA divides the number of intervals with agreement by the total number of intervals and multiplies by 100. With 15 agreements out of 20 intervals, agreement is 75%.

Question 11Measurement

Observer A times a behavior episode at 60 seconds and Observer B times the same episode at 54 seconds. Duration-based interobserver agreement is:

  1. 84%
  2. 90% Correct answer.
  3. 95%
  4. 80%

Explanation

Duration IOA is calculated by dividing the shorter recorded duration by the longer recorded duration and multiplying by 100. Here 54 divided by 60 equals 0.90, or 90% agreement.

Question 12Measurement

Two observers consistently produce the same scores, but both differ from the value recorded by a calibrated measurement device. This pattern shows:

  1. low accuracy and low reliability
  2. high accuracy and high reliability
  3. high accuracy and low reliability
  4. high reliability and low accuracy Correct answer.

Explanation

Reliability refers to consistency between observers, while accuracy refers to agreement with the true value. Observers who agree with one another but not with the calibrated standard are consistent but inaccurate.

Question 13Measurement

Baseline data show a steadily increasing trend for a behavior the intervention is designed to increase. The behavior analyst should:

  1. discard the baseline data and restart the graph
  2. start the intervention immediately to save sessions
  3. keep collecting baseline until the data stabilize Correct answer.
  4. average the baseline points and begin intervention

Explanation

A baseline that is trending in the direction the intervention is expected to produce makes it impossible to attribute later change to treatment. Baseline should continue until the data are stable or the trend runs opposite to the expected treatment effect.

Question 14Measurement

The overall direction of a data path across sessions on a line graph is called the:

  1. trend Correct answer.
  2. level
  3. range
  4. variability

Explanation

Trend describes the direction of the data path over time, such as increasing, decreasing, or flat. Level refers to the average value of the data within a phase, and variability refers to how much the points scatter.

Question 15Measurement

A supervisor asks you to record the time between two consecutive instances of the same behavior. You are measuring:

  1. interresponse time Correct answer.
  2. duration per occurrence
  3. rate of responding
  4. response latency

Explanation

Interresponse time is the elapsed time between the end of one instance of a behavior and the start of the next instance of that same behavior. It indexes how closely spaced the responses are.

Question 16Measurement

One student raises a hand 10 times in a 10-minute session, and another raises a hand 10 times in a 50-minute session. Which measure allows direct comparison of the two students?

  1. Duration per occurrence
  2. Frequency count
  3. Rate per minute Correct answer.
  4. Latency to the first response

Explanation

Rate expresses the count of responses per unit of time, which standardizes data collected across sessions of different lengths. Because the two sessions differ in length, raw counts alone cannot be compared fairly.

Question 17Measurement

A behavior occurs briefly a few times per session, but each occurrence is scored under 10-second partial-interval recording. Compared with true duration, the data will most likely:

  1. underestimate the amount of behavior
  2. equal the true duration
  3. be unrelated to the true duration
  4. overestimate the amount of behavior Correct answer.

Explanation

Partial-interval recording credits an entire interval for any occurrence within it, so a response lasting a second or two inflates the estimated proportion of time engaged in behavior. This overestimation grows when intervals are long relative to the behavior.

Question 18Measurement

Across three intervals, Observer A records 4, 6, and 2 responses, while Observer B records 4, 3, and 2. Mean count-per-interval interobserver agreement is:

  1. 83% Correct answer.
  2. 75%
  3. 90%
  4. 100%

Explanation

Count-per-interval IOA is computed for each interval by dividing the smaller count by the larger count, then averaging across intervals. The three ratios are 4/4, 3/6, and 2/2, giving 100%, 50%, and 100%, which average to about 83%.

Question 19Measurement

Which statement is the best example of an operational definition?

  1. Jayden hits or kicks others hard enough to be heard Correct answer.
  2. Jayden is aggressive whenever he is upset during work time
  3. Jayden feels angry and frustrated during work time
  4. Jayden has a bad temper on most school days

Explanation

An operational definition describes observable, measurable behavior in concrete terms so that different observers can agree on what counts. Specifying the topography, such as hitting or kicking another person, makes the behavior directly observable and countable.

Question 20Measurement

A vertical line drawn on a line graph to mark where one phase ends and the next begins is a:

  1. data path
  2. condition change line Correct answer.
  3. level line
  4. trend line

Explanation

Condition change lines separate phases such as baseline and intervention on a graph so that changes in the data can be read against phase changes. They are typically drawn as vertical lines at the point where conditions changed.

Question 21Measurement

A student responded correctly on 16 of 20 practice trials. The percent of opportunities with a correct response is:

  1. 80% Correct answer.
  2. 90%
  3. 75%
  4. 85%

Explanation

Percent of opportunities is calculated by dividing the number of correct responses by the total number of opportunities and multiplying by 100. Here 16 divided by 20 equals 0.80, or 80%.

Question 22Measurement

A behavior analyst must measure off-task behavior during a 40-minute independent work period. The behavior has no clear onset or offset, and episodes are brief and frequent. Which measurement approach is most practical?

  1. Duration per occurrence for each episode
  2. Latency to the first off-task episode
  3. Partial-interval recording in short intervals Correct answer.
  4. Permanent product count of unfinished items

Explanation

When a behavior lacks clear boundaries and occurs in brief, frequent episodes, interval recording provides a practical estimate of occurrence without requiring continuous timing. Partial-interval scoring in short intervals captures any occurrence within each interval.

Question 23Measurement

Intervention data show a highly variable data path that overlaps baseline, and staff report the intervention is being delivered inconsistently. The most appropriate next step is to:

  1. begin a different intervention immediately
  2. conclude the intervention was ineffective and stop it
  3. remove the outlying data points from the graph
  4. check implementation fidelity and keep collecting data Correct answer.

Explanation

When data are variable and the procedure is not being delivered as designed, treatment integrity must be assessed before drawing conclusions about effectiveness. Continuing data collection allows the effects of improved implementation to be evaluated.

Question 24Measurement

Best practice for interobserver agreement requires that a second observer collects data:

  1. at the end of the month from memory
  2. whenever the behavior looks unusually frequent
  3. only on sessions the primary observer found difficult
  4. independently during randomly selected sessions Correct answer.

Explanation

IOA is meaningful when observers record independently across a representative, randomly selected portion of sessions so that neither observer can influence the other. Scheduling checks in advance and avoiding cues about when agreement is being assessed protects the accuracy of the estimate.

Question 25Measurement

Why do behavior analysts collect baseline data before starting an intervention?

  1. to identify the function of the behavior
  2. to satisfy funders and nothing more
  3. to select effective reinforcers for the program
  4. to provide a comparison for later intervention data Correct answer.

Explanation

Baseline provides the pre-intervention level of the behavior against which later performance is compared when judging intervention effects. Without it, changes in behavior cannot be attributed to the intervention rather than to other factors.

Question 26Measurement

A teacher places a worksheet in front of a student and records the number of seconds that pass before the student writes the first answer. This is a measure of:

  1. rate
  2. latency Correct answer.
  3. duration
  4. interresponse time

Explanation

Latency is the elapsed time between the onset of a stimulus (here, the worksheet or instruction) and the onset of the response. It captures how long the learner takes to begin, not how long the behavior lasts or how often it occurs.

Question 27Measurement

Which of the following is an example of measuring behavior through a permanent product?

  1. Scanning the room every 2 minutes to count students who are working
  2. Tallying each time a student shouts out during a lesson as it happens
  3. Counting the completed homework pages left in a basket after class Correct answer.
  4. Using a stopwatch to time how long a student stays on task

Explanation

Permanent product measurement examines the tangible outcome the behavior leaves behind, so the behavior itself does not need to be observed while it occurs. Counting completed worksheets after class is a product measure; the other options all require watching behavior in real time.

Question 28Measurement

A therapist records how many teaching sessions are needed before a learner performs a skill correctly on 90% of trials in three consecutive sessions. This measure is best described as:

  1. percent of opportunities with a correct response
  2. interresponse time
  3. duration per session
  4. trials to criterion Correct answer.

Explanation

Trials to criterion counts how many trials, sessions, or teaching opportunities are required before the learner reaches a predetermined performance criterion. It summarizes how quickly a skill is acquired rather than the level of performance within any single session.

Question 29Measurement

A teacher wants a quick estimate of how many of the 25 students in her class are actively engaged in seatwork. At the end of each 10-minute interval she looks up and counts how many students are working. This procedure is:

  1. partial-interval recording for one target student
  2. a planned activity check (PLACHECK) Correct answer.
  3. duration recording of group engagement
  4. event recording of group behavior

Explanation

A PLACHECK is a momentary time-sampling procedure used with groups: at the end of each interval the observer counts how many members of the group are engaged in the target activity. It yields a group-level index of engagement rather than a measure of any one individual.

Question 30Measurement

Two observers independently tally the number of talk-outs in each of 10 intervals. Their counts are identical in 7 of the 10 intervals. Exact count-per-interval IOA is:

  1. 30%
  2. 100%
  3. 70% Correct answer.
  4. 43%

Explanation

Exact count-per-interval IOA divides the number of intervals in which the two observers recorded exactly the same count by the total number of intervals, then multiplies by 100 (7 ÷ 10 = 70%). The counts must match exactly; merely agreeing that a behavior occurred is not enough.

Question 31Measurement

An observer's recordings of a client's stereotypy gradually drop over several weeks even though the client's behavior and the observation procedures have not changed and the observer has grown more comfortable with the definition. This is best described as:

  1. reactivity
  2. poor treatment integrity
  3. observer bias
  4. observer drift Correct answer.

Explanation

Observer drift is a gradual, unintended change in how an observer applies a definition over time, which shifts the data even when the behavior and procedures stay the same. Periodic retraining and ongoing IOA checks are the standard safeguards against it.

Question 32Measurement

On a line graph, the value around which the data points in a phase cluster, often summarized as the mean or median of that phase, is called the:

  1. trend
  2. variability
  3. level Correct answer.
  4. range

Explanation

Level describes the overall magnitude of the data within a phase and is often summarized with the mean or median of the points in that phase. Trend concerns the direction of the data path, and variability concerns how spread out the points are.

Question 33Measurement

A behavior analyst uses the split-middle method to draw a line of progress through a phase of baseline data. The resulting line is best interpreted as:

  1. a summary of the interobserver agreement checks conducted across the phase
  2. a prediction of future performance under unchanged conditions Correct answer.
  3. the precise scores the client will earn in the next phase
  4. the single highest data point recorded during the phase

Explanation

The split-middle method fits a line through a set of data points and extends it, so the line of progress represents the predicted trend and rate of responding if current conditions continue. It is used to forecast performance, for example when judging whether a phase has stabilized before changing conditions.

Question 34Measurement

Two observers score a low-rate behavior using 20 intervals. They agree in 19 intervals, but the behavior occurred in only one interval and both observers missed it. The high agreement percentage is misleading because:

  1. the percentage was computed incorrectly for this type of IOA
  2. IOA should be calculated only for sessions longer than 30 minutes
  3. the observers should have used a permanent product measure instead
  4. agreement is inflated by the many intervals in which both observers recorded no behavior Correct answer.

Explanation

Interval-by-interval IOA credits agreement on nonoccurrence as agreement, so when a behavior is rare, observers who both score 'no' most of the time can show a high percentage even though they never agree that the behavior occurred. Occurrence and nonoccurrence IOA, or scored-interval IOA, are used to correct for this problem.

Question 35Assessment

A behavior technician records every instance of a client raising a hand during a 30-minute session. Which measurement procedure is being used?

  1. Permanent product recording
  2. Event recording Correct answer.
  3. Momentary time sampling
  4. Whole-interval recording

Explanation

Event recording counts each occurrence of a discrete response as it happens, producing a tally or rate for the session. Interval methods divide the session into time blocks, and permanent product measurement scores the tangible outcome of behavior rather than the behavior itself.

Question 36Assessment

In whole-interval recording, an interval is scored as an occurrence only when the behavior:

  1. is occurring when the interval ends
  2. occurs at least three times in the interval
  3. lasts for the entire interval Correct answer.
  4. occurs at any point during the interval

Explanation

Whole-interval recording requires the behavior to be present throughout the whole interval before the interval is scored. Because it demands sustained behavior, it typically underestimates how often a behavior occurs.

Question 37Assessment

Which measurement method is most likely to overestimate how long a behavior lasts?

  1. Inter-response time recording
  2. Partial-interval recording Correct answer.
  3. Duration recording
  4. Latency recording

Explanation

Partial-interval recording scores an entire interval as containing behavior even when only a brief instance occurred. This inflates estimates of how much time the behavior occupied.

Question 38Assessment

A teacher measures a student's completion of math work by counting finished worksheets left in the student's folder at the end of each day. This is an example of:

  1. Momentary time sampling
  2. Event recording during observation
  3. Whole-interval recording
  4. Permanent product recording Correct answer.

Explanation

Permanent product recording measures behavior through the tangible items or effects it leaves behind, allowing data collection after the behavior has ended. Counting completed worksheets is a classic permanent product.

Question 39Assessment

A technician starts a stopwatch when an instruction is delivered and stops it when the client begins to respond. Which measure is being recorded?

  1. Latency Correct answer.
  2. Rate
  3. Inter-response time
  4. Duration

Explanation

Latency is the elapsed time between the presentation of a stimulus or instruction and the start of the response. Duration would measure from the start of the response to its end.

Question 40Assessment

A teacher places two items in front of a student, asks the student to pick one, and then repeats this with each possible pair of items. Which preference assessment is this?

  1. Multiple stimulus without replacement
  2. Free operant
  3. Paired-choice Correct answer.
  4. Single stimulus

Explanation

A paired-choice assessment presents two items per trial and asks the client to select one, with every item eventually paired with every other item. The resulting data yield a rank ordering of preference.

Question 41Assessment

On an ABC data sheet, the antecedent column should contain:

  1. the client's response to the instruction
  2. how staff responded to the behavior
  3. the number of times the behavior occurred
  4. what was happening just before the behavior occurred Correct answer.

Explanation

ABC recording documents the Antecedent (events immediately preceding the behavior), the Behavior itself, and the Consequence that follows. The antecedent column captures the conditions or triggers present right before the behavior.

Question 42Assessment

A technician collects data on a target behavior under the current classroom conditions before any intervention begins. These data are called:

  1. baseline Correct answer.
  2. maintenance data
  3. probe data
  4. generalization data

Explanation

Baseline data describe the level of behavior under existing conditions before treatment is introduced. Baseline serves as the comparison against which intervention effects are judged.

Question 43Assessment

A technician watches a client for two hours and, every 10 minutes, records whether the client is on task at that exact moment. Which procedure is this?

  1. Whole-interval recording
  2. Partial-interval recording
  3. Duration recording
  4. Momentary time sampling Correct answer.

Explanation

Momentary time sampling requires the observer to check the client only at the instant each interval ends and record whether the behavior is occurring at that moment. No observation is required during the rest of the interval.

Question 44Assessment

A client engaged in 24 responses during a 6-minute session. What is the rate per minute?

  1. 4 Correct answer.
  2. 144
  3. 6
  4. 2

Explanation

Rate is calculated by dividing the number of responses by the number of minutes in the observation period. Here 24 responses divided by 6 minutes equals 4 responses per minute.

Question 45Assessment

Two observers record the same session independently. One records 18 responses and the other records 20. Using the smaller count divided by the larger count, what is the interobserver agreement?

  1. 80%
  2. 95%
  3. 85%
  4. 90% Correct answer.

Explanation

The smaller/larger method divides the lower total by the higher total and multiplies by 100. Here 18 divided by 20 equals 0.90, or 90% agreement.

Question 46Assessment

On a standard line graph, the horizontal axis (x-axis) is used to display:

  1. the measure of the behavior
  2. the sessions or units of time Correct answer.
  3. the percentage of intervals scored
  4. phase change lines

Explanation

The x-axis of a line graph represents the passage of time, typically successive sessions or days. The y-axis represents the behavioral measure itself.

Question 47Assessment

A technician places several toys in a room, lets the client move freely among them for 10 minutes, and records how long the client plays with each toy. This is:

  1. a free operant preference assessment Correct answer.
  2. a multiple stimulus without replacement assessment
  3. a single-stimulus preference assessment
  4. a paired-choice preference assessment

Explanation

In a free operant assessment the client has unrestricted access to multiple items, and preference is inferred from the duration of engagement with each item. No items are presented or removed on discrete trials.

Question 48Assessment

In a multiple stimulus without replacement (MSWO) preference assessment:

  1. the chosen item is removed before the next trial Correct answer.
  2. each item is presented alone
  3. the array stays the same across trials
  4. only two items are presented per trial

Explanation

MSWO presents an array of items, the client selects one, and that item is removed before the next trial so remaining items are re-ranked. This produces a hierarchy of preference across the array.

Question 49Assessment

A technician starts a timer when crying begins and stops it when crying has stopped for 30 seconds. Which measure is being recorded?

  1. Frequency
  2. Duration Correct answer.
  3. Inter-response time
  4. Latency

Explanation

Duration measures the total elapsed time a behavior occurs from onset to offset. Using a criterion such as 30 seconds of no crying defines when the episode has ended.

Question 50Assessment

In a functional analysis, a condition in which the therapist gives attention only after the target behavior occurs is designed to test whether the behavior is maintained by:

  1. access to tangible items
  2. attention Correct answer.
  3. automatic reinforcement
  4. escape from demands

Explanation

In the attention condition, attention is delivered contingently on problem behavior while other consequences are withheld. Elevated responding in that condition relative to control conditions suggests an attention function.