2026/2027
BCBA Board Certified Behavior
Analyst Exam 2026/2027: Complete
Study Guide and Practice Questions
Question 1:
A behavior analyst receives a referral for a student who frequently leaves the
classroom without permission. Before developing an intervention, what should the
behavior analyst do first?
A. Implement a response-cost procedure
B. Conduct an assessment of the behavior
C. Train the teacher to deliver reinforcement
D. Evaluate the effectiveness of previous treatment
Correct Answer: B. Conduct an assessment of the behavior
Rationale: Assessment is the first phase of the four-phase intervention process,
followed by planning, implementation, and evaluation. It identifies whether behavior-
analytic services are needed, clarifies the behavior requiring change, and supports
development of a function-based intervention. Implementing punishment or
reinforcement before assessment risks selecting an ineffective default intervention.
Evaluation occurs after an intervention has been implemented.
Question 2:
A school administrator asks a behavior analyst to reduce a student’s habit of tapping a
pencil because the sound is mildly irritating. The behavior causes no meaningful
disruption or harm. What is the most appropriate initial response?
A. Begin collecting frequency data immediately
B. Conduct a functional analysis of the tapping
C. Determine whether the behavior is socially significant
D. Recommend permanent removal of all pencils
Correct Answer: C. Determine whether the behavior is socially significant
Rationale: Behavior analysts should intervene primarily on socially significant
behaviors that meaningfully affect safety, independence, learning, relationships,
inclusion, or quality of life. Mildly irritating behavior may not warrant intervention
unless it substantially affects the student or others. Data collection or functional
analysis should not automatically occur merely because another person dislikes a
behavior. Removing pencils would also be unnecessarily restrictive.
,2026/2027
Question 3:
A teacher gives a student detention whenever the student chews gum, without
examining what maintains the behavior. This intervention is best classified as:
A. A constructional intervention
B. A function-based treatment
C. A default technology
D. A stimulus preference assessment
Correct Answer: C. A default technology
Rationale: Default technologies are coercive or punishment-based interventions
selected arbitrarily without considering the function of behavior. Detention may
suppress gum chewing temporarily, but it does not identify why the behavior occurs
or teach an appropriate alternative. A function-based intervention would first assess
relevant antecedents and consequences. A constructional intervention would actively
teach a replacement behavior rather than merely punish the existing response.
Question 4:
Which sequence correctly represents the major phases of behavior-analytic
intervention?
A. Planning, assessment, evaluation, implementation
B. Assessment, planning, implementation, evaluation
C. Assessment, implementation, planning, evaluation
D. Screening, punishment, reinforcement, discharge
Correct Answer: B. Assessment, planning, implementation, evaluation
Rationale: Behavior-analytic intervention begins with assessment, which determines
the need for services and identifies meaningful target behaviors and possible
behavioral functions. Planning then uses the assessment findings to select appropriate
procedures. The intervention is subsequently implemented, and evaluation determines
whether meaningful behavior change occurred. Changing this sequence could result in
interventions being selected without sufficient information or effectiveness being
judged prematurely.
Question 5:
A behavior analyst has completed coursework on indirect assessments but has never
received supervised training in functional analysis. A caregiver requests a functional
analysis of severe aggression. What should the analyst do?
A. Conduct the analysis because all behavior analysts may perform it
B. Conduct only the attention condition
,2026/2027
C. Decline or obtain qualified supervision and training
D. Ask the caregiver to perform the analysis independently
Correct Answer: C. Decline or obtain qualified supervision and training
Rationale: Behavior analysts must operate within their scope of competence.
Functional analysis requires specific supervised training because environmental
events are systematically manipulated and dangerous behavior may increase.
Competence in interviews or indirect assessments does not automatically establish
competence in functional analysis. Conducting only one condition would not correct
the competency problem, while delegating the procedure to an untrained caregiver
could create serious ethical and safety risks.
Question 6:
Before beginning a behavioral assessment, which action most directly satisfies ethical
requirements related to authorization?
A. Obtain written approval from the client and relevant stakeholders
B. Ask a colleague whether assessment seems necessary
C. Begin observation before explaining the procedure
D. Obtain verbal approval only from an unrelated staff member
Correct Answer: A. Obtain written approval from the client and relevant
stakeholders
Rationale: Before conducting an assessment, the behavior analyst should obtain
informed approval, preferably in writing, from the client and relevant stakeholders.
Written consent documents authorization and promotes transparency regarding the
purpose and procedures of assessment. Approval from an unrelated employee is
insufficient. Beginning observation without explaining the procedure may violate
consent expectations, confidentiality requirements, and the client’s right to participate
in decisions affecting services.
Question 7:
A long-term client suddenly begins spitting, although the behavior has never occurred
previously. What should the behavior analyst prioritize before conducting a functional
behavior assessment?
A. Place the behavior on extinction
B. Request an appropriate medical evaluation
C. Assume the behavior is attention-maintained
D. Conduct a tangible condition immediately
Correct Answer: B. Request an appropriate medical evaluation
, 2026/2027
Rationale: A sudden, unexplained change in behavior may be influenced by medical
or biological variables. Behavior analysts should ensure that possible medical needs
are assessed when there is a reasonable likelihood of physiological involvement. If a
medical condition explains the behavior, medical treatment may be the primary
intervention. Assuming a behavioral function or implementing extinction without
ruling out medical causes could be ineffective, unethical, and potentially harmful.
Question 8:
A medical evaluation confirms that a client’s new self-injurious behavior occurs
during untreated seizures. What is the most appropriate conclusion?
A. ABA should replace medical treatment
B. The behavior must be maintained by escape
C. Medical treatment should address the identified condition
D. A functional analysis must occur before medical intervention
Correct Answer: C. Medical treatment should address the identified condition
Rationale: When a medical evaluation identifies a condition that directly influences
the referred behavior, the medical condition should be appropriately treated. Behavior
analysis should not substitute for necessary healthcare. Additional behavioral support
may later be considered if clinically indicated, but the identified biological cause must
not be ignored. Conducting a functional analysis first could expose the client to
unnecessary risk and delay essential medical care.
Question 9:
Which referral most clearly demonstrates an immediate need for behavior-analytic
services?
A. A 13-year-old privately engages in developmentally typical sexual behavior
B. A student occasionally chooses a blue pen instead of a black pen
C. A child repeatedly runs away from caregivers in busy parking lots
D. An adult prefers eating lunch alone twice each week
Correct Answer: C. A child repeatedly runs away from caregivers in busy
parking lots
Rationale: Running away in a parking lot presents a serious and immediate risk of
physical injury or death, making it a socially significant target. Developmentally
typical behavior does not automatically require intervention, and harmless personal
preferences usually do not justify treatment. The severity, potential consequences, and
effect on well-being make dangerous elopement a much higher priority than behaviors
that merely differ from another person’s preferences.
Question 10:
BCBA Board Certified Behavior
Analyst Exam 2026/2027: Complete
Study Guide and Practice Questions
Question 1:
A behavior analyst receives a referral for a student who frequently leaves the
classroom without permission. Before developing an intervention, what should the
behavior analyst do first?
A. Implement a response-cost procedure
B. Conduct an assessment of the behavior
C. Train the teacher to deliver reinforcement
D. Evaluate the effectiveness of previous treatment
Correct Answer: B. Conduct an assessment of the behavior
Rationale: Assessment is the first phase of the four-phase intervention process,
followed by planning, implementation, and evaluation. It identifies whether behavior-
analytic services are needed, clarifies the behavior requiring change, and supports
development of a function-based intervention. Implementing punishment or
reinforcement before assessment risks selecting an ineffective default intervention.
Evaluation occurs after an intervention has been implemented.
Question 2:
A school administrator asks a behavior analyst to reduce a student’s habit of tapping a
pencil because the sound is mildly irritating. The behavior causes no meaningful
disruption or harm. What is the most appropriate initial response?
A. Begin collecting frequency data immediately
B. Conduct a functional analysis of the tapping
C. Determine whether the behavior is socially significant
D. Recommend permanent removal of all pencils
Correct Answer: C. Determine whether the behavior is socially significant
Rationale: Behavior analysts should intervene primarily on socially significant
behaviors that meaningfully affect safety, independence, learning, relationships,
inclusion, or quality of life. Mildly irritating behavior may not warrant intervention
unless it substantially affects the student or others. Data collection or functional
analysis should not automatically occur merely because another person dislikes a
behavior. Removing pencils would also be unnecessarily restrictive.
,2026/2027
Question 3:
A teacher gives a student detention whenever the student chews gum, without
examining what maintains the behavior. This intervention is best classified as:
A. A constructional intervention
B. A function-based treatment
C. A default technology
D. A stimulus preference assessment
Correct Answer: C. A default technology
Rationale: Default technologies are coercive or punishment-based interventions
selected arbitrarily without considering the function of behavior. Detention may
suppress gum chewing temporarily, but it does not identify why the behavior occurs
or teach an appropriate alternative. A function-based intervention would first assess
relevant antecedents and consequences. A constructional intervention would actively
teach a replacement behavior rather than merely punish the existing response.
Question 4:
Which sequence correctly represents the major phases of behavior-analytic
intervention?
A. Planning, assessment, evaluation, implementation
B. Assessment, planning, implementation, evaluation
C. Assessment, implementation, planning, evaluation
D. Screening, punishment, reinforcement, discharge
Correct Answer: B. Assessment, planning, implementation, evaluation
Rationale: Behavior-analytic intervention begins with assessment, which determines
the need for services and identifies meaningful target behaviors and possible
behavioral functions. Planning then uses the assessment findings to select appropriate
procedures. The intervention is subsequently implemented, and evaluation determines
whether meaningful behavior change occurred. Changing this sequence could result in
interventions being selected without sufficient information or effectiveness being
judged prematurely.
Question 5:
A behavior analyst has completed coursework on indirect assessments but has never
received supervised training in functional analysis. A caregiver requests a functional
analysis of severe aggression. What should the analyst do?
A. Conduct the analysis because all behavior analysts may perform it
B. Conduct only the attention condition
,2026/2027
C. Decline or obtain qualified supervision and training
D. Ask the caregiver to perform the analysis independently
Correct Answer: C. Decline or obtain qualified supervision and training
Rationale: Behavior analysts must operate within their scope of competence.
Functional analysis requires specific supervised training because environmental
events are systematically manipulated and dangerous behavior may increase.
Competence in interviews or indirect assessments does not automatically establish
competence in functional analysis. Conducting only one condition would not correct
the competency problem, while delegating the procedure to an untrained caregiver
could create serious ethical and safety risks.
Question 6:
Before beginning a behavioral assessment, which action most directly satisfies ethical
requirements related to authorization?
A. Obtain written approval from the client and relevant stakeholders
B. Ask a colleague whether assessment seems necessary
C. Begin observation before explaining the procedure
D. Obtain verbal approval only from an unrelated staff member
Correct Answer: A. Obtain written approval from the client and relevant
stakeholders
Rationale: Before conducting an assessment, the behavior analyst should obtain
informed approval, preferably in writing, from the client and relevant stakeholders.
Written consent documents authorization and promotes transparency regarding the
purpose and procedures of assessment. Approval from an unrelated employee is
insufficient. Beginning observation without explaining the procedure may violate
consent expectations, confidentiality requirements, and the client’s right to participate
in decisions affecting services.
Question 7:
A long-term client suddenly begins spitting, although the behavior has never occurred
previously. What should the behavior analyst prioritize before conducting a functional
behavior assessment?
A. Place the behavior on extinction
B. Request an appropriate medical evaluation
C. Assume the behavior is attention-maintained
D. Conduct a tangible condition immediately
Correct Answer: B. Request an appropriate medical evaluation
, 2026/2027
Rationale: A sudden, unexplained change in behavior may be influenced by medical
or biological variables. Behavior analysts should ensure that possible medical needs
are assessed when there is a reasonable likelihood of physiological involvement. If a
medical condition explains the behavior, medical treatment may be the primary
intervention. Assuming a behavioral function or implementing extinction without
ruling out medical causes could be ineffective, unethical, and potentially harmful.
Question 8:
A medical evaluation confirms that a client’s new self-injurious behavior occurs
during untreated seizures. What is the most appropriate conclusion?
A. ABA should replace medical treatment
B. The behavior must be maintained by escape
C. Medical treatment should address the identified condition
D. A functional analysis must occur before medical intervention
Correct Answer: C. Medical treatment should address the identified condition
Rationale: When a medical evaluation identifies a condition that directly influences
the referred behavior, the medical condition should be appropriately treated. Behavior
analysis should not substitute for necessary healthcare. Additional behavioral support
may later be considered if clinically indicated, but the identified biological cause must
not be ignored. Conducting a functional analysis first could expose the client to
unnecessary risk and delay essential medical care.
Question 9:
Which referral most clearly demonstrates an immediate need for behavior-analytic
services?
A. A 13-year-old privately engages in developmentally typical sexual behavior
B. A student occasionally chooses a blue pen instead of a black pen
C. A child repeatedly runs away from caregivers in busy parking lots
D. An adult prefers eating lunch alone twice each week
Correct Answer: C. A child repeatedly runs away from caregivers in busy
parking lots
Rationale: Running away in a parking lot presents a serious and immediate risk of
physical injury or death, making it a socially significant target. Developmentally
typical behavior does not automatically require intervention, and harmless personal
preferences usually do not justify treatment. The severity, potential consequences, and
effect on well-being make dangerous elopement a much higher priority than behaviors
that merely differ from another person’s preferences.
Question 10:
