BCBA MOCK EXAM 2025/2026 WITH 100%
ACCURATE ANSWERS
2026 Exam · 98 Questions · With Rationales
ati. BCBA MOCK EXAM 2025/2026 WITH 100% ACCURATE ANSWERS
Question: 1 of 98
A behavior analyst is evaluating a treatment for severe self-injury using a multiple baseline across settings
design. Midway through the intervention phase in Setting A, a sudden and sustained increase in self-injury
A. Maturation
B. Instrumentation drift
C. History
D. Multiple-treatment interference
PREVIOUS CONTINUE
A behavior analyst is evaluating a treatment for severe self-injury using a multiple
baseline across settings design. Midway through the intervention phase in Setting A, a
sudden and sustained increase in self-injury occurs only in that setting, while baseline
data in Settings B and C remain stable. Which threat to internal validity is most directly
implicated?
A. Maturation
B. Instrumentation drift
(Correct) C. History
D. Multiple-treatment interference
Correct Answer: C
A sudden change coinciding with the intervention in only one setting suggests an external event (history)
specific to that setting and time. Maturation and instrumentation drift would likely affect all settings similarly.
Multiple-treatment interference is not applicable because only one treatment is being evaluated sequentially
across settings.
Page 1 | BCBA MOCK EXAM 2025/2026 WITH 100% ACCURATE ANSWERS 2026
, BCBA MOCK EXAM 2025/2026 WITH 100%
ACCURATE ANSWERS
2026 Exam · 98 Questions · With Rationales
ati. BCBA MOCK EXAM 2025/2026 WITH 100% ACCURATE ANSWERS
Question: 2 of 98
Which of the following best exemplifies a response class hierarchy in the context of functional communication
training (FCT)?
A. Teaching a single mand (e.g., 'break') that replaces problem behavior across all motivating operations.
B. Sequentially teaching increasingly complex mands (e.g., 'break', then 'break please', then 'I need a break') based
C. Reinforcing any communication response (e.g., pointing, vocalizing, signing) that occurs before problem
D. Using a token economy to reinforce all appropriate requests while extinguishing problem behavior.
PREVIOUS CONTINUE
Which of the following best exemplifies a response class hierarchy in the context of
functional communication training (FCT)?
A. Teaching a single mand (e.g., 'break') that replaces problem behavior across all motivating
operations.
(Correct) B. Sequentially teaching increasingly complex mands (e.g., 'break', then 'break please',
then 'I need a break') based on schedule thinning.
C. Reinforcing any communication response (e.g., pointing, vocalizing, signing) that occurs
before problem behavior.
D. Using a token economy to reinforce all appropriate requests while extinguishing problem
behavior.
Correct Answer: B
A response class hierarchy in FCT involves systematically teaching more complex or socially appropriate
mands as the intervention progresses, often to facilitate schedule thinning. Option A describes a single
response, not a hierarchy. Option C describes a differential reinforcement procedure, not a hierarchy. Option D
is a token economy, which is not specific to response class hierarchies.
Page 2 | BCBA MOCK EXAM 2025/2026 WITH 100% ACCURATE ANSWERS 2026
, BCBA MOCK EXAM 2025/2026 WITH 100%
ACCURATE ANSWERS
2026 Exam · 98 Questions · With Rationales
ati. BCBA MOCK EXAM 2025/2026 WITH 100% ACCURATE ANSWERS
Question: 3 of 98
A behavior analyst collects data using partial-interval recording and reports a high rate of behavior. However,
direct observation reveals the behavior occurs in long, continuous bouts. What is the most likely measurement
A. Underestimation of behavior due to interval size
B. Overestimation of behavior due to the method's insensitivity to duration
C. Accurate estimation because partial-interval captures all occurrences
D. Underestimation because partial-interval requires behavior to occur at the end of the interval
PREVIOUS CONTINUE
A behavior analyst collects data using partial-interval recording and reports a high rate of
behavior. However, direct observation reveals the behavior occurs in long, continuous
bouts. What is the most likely measurement artifact?
A. Underestimation of behavior due to interval size
(Correct) B. Overestimation of behavior due to the method's insensitivity to duration
C. Accurate estimation because partial-interval captures all occurrences
D. Underestimation because partial-interval requires behavior to occur at the end of the interval
Correct Answer: B
Partial-interval recording tends to overestimate behavior because a response occurring at any point in the
interval is scored for the entire interval, inflating estimates when behavior is continuous. Underestimation is
associated with whole-interval recording. Partial-interval does not require behavior at the end of the interval;
that is a mischaracterization.
Page 3 | BCBA MOCK EXAM 2025/2026 WITH 100% ACCURATE ANSWERS 2026
, BCBA MOCK EXAM 2025/2026 WITH 100%
ACCURATE ANSWERS
2026 Exam · 98 Questions · With Rationales
ati. BCBA MOCK EXAM 2025/2026 WITH 100% ACCURATE ANSWERS
Question: 4 of 98
In a concurrent schedules arrangement, a behavior analyst wants to increase engagement in a vocational task
and decrease off-task behavior. Which arrangement best exemplifies a matching law application?
A. Provide equal reinforcement for on-task and off-task behavior.
B. Deliver higher quality reinforcement for on-task behavior relative to off-task behavior.
C. Use a fixed-ratio schedule for on-task and variable-interval for off-task.
D. Punish off-task behavior while reinforcing on-task behavior on a fixed-interval schedule.
PREVIOUS CONTINUE
In a concurrent schedules arrangement, a behavior analyst wants to increase engagement
in a vocational task and decrease off-task behavior. Which arrangement best exemplifies a
matching law application?
A. Provide equal reinforcement for on-task and off-task behavior.
(Correct) B. Deliver higher quality reinforcement for on-task behavior relative to off-task behavior.
C. Use a fixed-ratio schedule for on-task and variable-interval for off-task.
D. Punish off-task behavior while reinforcing on-task behavior on a fixed-interval schedule.
Correct Answer: B
The matching law predicts that behavior allocation matches relative reinforcement rates and quality; increasing
the quality or magnitude of reinforcement for on-task behavior should increase its proportion. Equal
reinforcement would not shift preference. Different schedule types alone do not directly apply matching law.
Punishment is not part of the matching law framework.
Page 4 | BCBA MOCK EXAM 2025/2026 WITH 100% ACCURATE ANSWERS 2026
ACCURATE ANSWERS
2026 Exam · 98 Questions · With Rationales
ati. BCBA MOCK EXAM 2025/2026 WITH 100% ACCURATE ANSWERS
Question: 1 of 98
A behavior analyst is evaluating a treatment for severe self-injury using a multiple baseline across settings
design. Midway through the intervention phase in Setting A, a sudden and sustained increase in self-injury
A. Maturation
B. Instrumentation drift
C. History
D. Multiple-treatment interference
PREVIOUS CONTINUE
A behavior analyst is evaluating a treatment for severe self-injury using a multiple
baseline across settings design. Midway through the intervention phase in Setting A, a
sudden and sustained increase in self-injury occurs only in that setting, while baseline
data in Settings B and C remain stable. Which threat to internal validity is most directly
implicated?
A. Maturation
B. Instrumentation drift
(Correct) C. History
D. Multiple-treatment interference
Correct Answer: C
A sudden change coinciding with the intervention in only one setting suggests an external event (history)
specific to that setting and time. Maturation and instrumentation drift would likely affect all settings similarly.
Multiple-treatment interference is not applicable because only one treatment is being evaluated sequentially
across settings.
Page 1 | BCBA MOCK EXAM 2025/2026 WITH 100% ACCURATE ANSWERS 2026
, BCBA MOCK EXAM 2025/2026 WITH 100%
ACCURATE ANSWERS
2026 Exam · 98 Questions · With Rationales
ati. BCBA MOCK EXAM 2025/2026 WITH 100% ACCURATE ANSWERS
Question: 2 of 98
Which of the following best exemplifies a response class hierarchy in the context of functional communication
training (FCT)?
A. Teaching a single mand (e.g., 'break') that replaces problem behavior across all motivating operations.
B. Sequentially teaching increasingly complex mands (e.g., 'break', then 'break please', then 'I need a break') based
C. Reinforcing any communication response (e.g., pointing, vocalizing, signing) that occurs before problem
D. Using a token economy to reinforce all appropriate requests while extinguishing problem behavior.
PREVIOUS CONTINUE
Which of the following best exemplifies a response class hierarchy in the context of
functional communication training (FCT)?
A. Teaching a single mand (e.g., 'break') that replaces problem behavior across all motivating
operations.
(Correct) B. Sequentially teaching increasingly complex mands (e.g., 'break', then 'break please',
then 'I need a break') based on schedule thinning.
C. Reinforcing any communication response (e.g., pointing, vocalizing, signing) that occurs
before problem behavior.
D. Using a token economy to reinforce all appropriate requests while extinguishing problem
behavior.
Correct Answer: B
A response class hierarchy in FCT involves systematically teaching more complex or socially appropriate
mands as the intervention progresses, often to facilitate schedule thinning. Option A describes a single
response, not a hierarchy. Option C describes a differential reinforcement procedure, not a hierarchy. Option D
is a token economy, which is not specific to response class hierarchies.
Page 2 | BCBA MOCK EXAM 2025/2026 WITH 100% ACCURATE ANSWERS 2026
, BCBA MOCK EXAM 2025/2026 WITH 100%
ACCURATE ANSWERS
2026 Exam · 98 Questions · With Rationales
ati. BCBA MOCK EXAM 2025/2026 WITH 100% ACCURATE ANSWERS
Question: 3 of 98
A behavior analyst collects data using partial-interval recording and reports a high rate of behavior. However,
direct observation reveals the behavior occurs in long, continuous bouts. What is the most likely measurement
A. Underestimation of behavior due to interval size
B. Overestimation of behavior due to the method's insensitivity to duration
C. Accurate estimation because partial-interval captures all occurrences
D. Underestimation because partial-interval requires behavior to occur at the end of the interval
PREVIOUS CONTINUE
A behavior analyst collects data using partial-interval recording and reports a high rate of
behavior. However, direct observation reveals the behavior occurs in long, continuous
bouts. What is the most likely measurement artifact?
A. Underestimation of behavior due to interval size
(Correct) B. Overestimation of behavior due to the method's insensitivity to duration
C. Accurate estimation because partial-interval captures all occurrences
D. Underestimation because partial-interval requires behavior to occur at the end of the interval
Correct Answer: B
Partial-interval recording tends to overestimate behavior because a response occurring at any point in the
interval is scored for the entire interval, inflating estimates when behavior is continuous. Underestimation is
associated with whole-interval recording. Partial-interval does not require behavior at the end of the interval;
that is a mischaracterization.
Page 3 | BCBA MOCK EXAM 2025/2026 WITH 100% ACCURATE ANSWERS 2026
, BCBA MOCK EXAM 2025/2026 WITH 100%
ACCURATE ANSWERS
2026 Exam · 98 Questions · With Rationales
ati. BCBA MOCK EXAM 2025/2026 WITH 100% ACCURATE ANSWERS
Question: 4 of 98
In a concurrent schedules arrangement, a behavior analyst wants to increase engagement in a vocational task
and decrease off-task behavior. Which arrangement best exemplifies a matching law application?
A. Provide equal reinforcement for on-task and off-task behavior.
B. Deliver higher quality reinforcement for on-task behavior relative to off-task behavior.
C. Use a fixed-ratio schedule for on-task and variable-interval for off-task.
D. Punish off-task behavior while reinforcing on-task behavior on a fixed-interval schedule.
PREVIOUS CONTINUE
In a concurrent schedules arrangement, a behavior analyst wants to increase engagement
in a vocational task and decrease off-task behavior. Which arrangement best exemplifies a
matching law application?
A. Provide equal reinforcement for on-task and off-task behavior.
(Correct) B. Deliver higher quality reinforcement for on-task behavior relative to off-task behavior.
C. Use a fixed-ratio schedule for on-task and variable-interval for off-task.
D. Punish off-task behavior while reinforcing on-task behavior on a fixed-interval schedule.
Correct Answer: B
The matching law predicts that behavior allocation matches relative reinforcement rates and quality; increasing
the quality or magnitude of reinforcement for on-task behavior should increase its proportion. Equal
reinforcement would not shift preference. Different schedule types alone do not directly apply matching law.
Punishment is not part of the matching law framework.
Page 4 | BCBA MOCK EXAM 2025/2026 WITH 100% ACCURATE ANSWERS 2026
