Wisconsin Behavior Analyst Behavior Analyst
Certification Board (BACB) Practice Exam
2026/2027 – Complete Exam-Style Questions
with Correct Answers & Detailed Rationales |
Verified & Reliable
1. Measurement
A behavior analyst defines aggression as “any instance in which
the client makes forceful physical contact with another person
using an open or closed hand.” Which property of the definition
is most important for ensuring that two observers can reliably
identify the target behavior?
A. It includes the presumed function of aggression
B. It describes the behavior in observable and measurable
terms
C. It specifies the intervention to be implemented
D. It includes the client's motivation for engaging in aggression
Correct answer: B. It describes the behavior in observable and
measurable terms
An operational definition should identify behavior in observable,
measurable, and sufficiently precise terms so that different
,observers can apply the definition consistently. A functional
interpretation or presumed motivation does not belong in the
operational definition itself. The definition should describe what
the person does rather than why the person does it.
2. Measurement
A behavior analyst records the number of completed tasks
during each 30-minute session. Which measurement dimension
is being assessed most directly?
A. Latency
B. Duration
C. Frequency
D. Interresponse time
Correct answer: C. Frequency
Frequency is the number of occurrences of a behavior. Because
the analyst is counting completed tasks within a defined
observation period, frequency is the direct measurement
dimension. If session durations differed substantially, rate
would provide a more standardized comparison by
incorporating time.
3. Measurement
,A client engages in stereotypy continuously throughout an
observation period, making discrete event recording
impractical. The behavior analyst records the total amount of
time the behavior occurs during the session. Which
measurement is most appropriate?
A. Duration
B. Latency
C. Whole-interval recording
D. Permanent-product recording
Correct answer: A. Duration
Duration measures the amount of time a behavior occurs. It is
particularly appropriate for behaviors that are continuous or
have meaningful temporal length. Latency measures the time
between a stimulus and the onset of behavior, whereas
permanent-product measurement relies on a lasting
environmental outcome.
4. Measurement
A behavior analyst wants to determine whether a learner
begins responding more quickly after an instruction is
delivered. Which measurement is most directly relevant?
A. Rate
B. Latency
, C. Interresponse time
D. Duration
Correct answer: B. Latency
Latency is the elapsed time between the presentation of a
stimulus and the initiation of a response. Because the clinical
question concerns how quickly the learner begins responding
after an instruction, latency directly measures the relevant
dimension.
5. Measurement
A staff member records whether a client engages in hand biting
at any point during each 10-second interval. The behavior
occurs only briefly in many intervals. Which discontinuous
measurement procedure is being used?
A. Whole-interval recording
B. Partial-interval recording
C. Momentary time sampling
D. Placheck
Correct answer: B. Partial-interval recording
Partial-interval recording scores the behavior as occurring if it
happens at any point during the interval. It is therefore sensitive
to brief occurrences but can overestimate the total amount of
Certification Board (BACB) Practice Exam
2026/2027 – Complete Exam-Style Questions
with Correct Answers & Detailed Rationales |
Verified & Reliable
1. Measurement
A behavior analyst defines aggression as “any instance in which
the client makes forceful physical contact with another person
using an open or closed hand.” Which property of the definition
is most important for ensuring that two observers can reliably
identify the target behavior?
A. It includes the presumed function of aggression
B. It describes the behavior in observable and measurable
terms
C. It specifies the intervention to be implemented
D. It includes the client's motivation for engaging in aggression
Correct answer: B. It describes the behavior in observable and
measurable terms
An operational definition should identify behavior in observable,
measurable, and sufficiently precise terms so that different
,observers can apply the definition consistently. A functional
interpretation or presumed motivation does not belong in the
operational definition itself. The definition should describe what
the person does rather than why the person does it.
2. Measurement
A behavior analyst records the number of completed tasks
during each 30-minute session. Which measurement dimension
is being assessed most directly?
A. Latency
B. Duration
C. Frequency
D. Interresponse time
Correct answer: C. Frequency
Frequency is the number of occurrences of a behavior. Because
the analyst is counting completed tasks within a defined
observation period, frequency is the direct measurement
dimension. If session durations differed substantially, rate
would provide a more standardized comparison by
incorporating time.
3. Measurement
,A client engages in stereotypy continuously throughout an
observation period, making discrete event recording
impractical. The behavior analyst records the total amount of
time the behavior occurs during the session. Which
measurement is most appropriate?
A. Duration
B. Latency
C. Whole-interval recording
D. Permanent-product recording
Correct answer: A. Duration
Duration measures the amount of time a behavior occurs. It is
particularly appropriate for behaviors that are continuous or
have meaningful temporal length. Latency measures the time
between a stimulus and the onset of behavior, whereas
permanent-product measurement relies on a lasting
environmental outcome.
4. Measurement
A behavior analyst wants to determine whether a learner
begins responding more quickly after an instruction is
delivered. Which measurement is most directly relevant?
A. Rate
B. Latency
, C. Interresponse time
D. Duration
Correct answer: B. Latency
Latency is the elapsed time between the presentation of a
stimulus and the initiation of a response. Because the clinical
question concerns how quickly the learner begins responding
after an instruction, latency directly measures the relevant
dimension.
5. Measurement
A staff member records whether a client engages in hand biting
at any point during each 10-second interval. The behavior
occurs only briefly in many intervals. Which discontinuous
measurement procedure is being used?
A. Whole-interval recording
B. Partial-interval recording
C. Momentary time sampling
D. Placheck
Correct answer: B. Partial-interval recording
Partial-interval recording scores the behavior as occurring if it
happens at any point during the interval. It is therefore sensitive
to brief occurrences but can overestimate the total amount of
