Free BCBA Behavior Assessment Practice Test 2026 — Board Certified Behavior Analyst Questions

This free BCBA Behavior Assessment practice test covers behavior assessment — FBA, functional analysis, preference and skills assessments (VB-MAPP, ABLLS-R), and operational definitions of behavior. Each question includes a detailed explanation grounded in applied behavior analysis principles and the BACB Ethics Code.

Key Topics in BCBA Behavior Assessment

6 Free BCBA Behavior Assessment Practice Questions with Answers

Sample Question 1 — Behavior Assessment

A 6-year-old client frequently engages in disruptive behaviors (e.g., hitting, screaming) during transitions at school. The teacher reports these behaviors occur across settings and with various adults. What is the BEST initial step to conduct a functional behavior assessment (FBA)?

  1. A. Implement a behavior intervention plan (BIP) focusing on positive reinforcement.
  2. B. Immediately begin extinction procedures to eliminate the disruptive behaviors.
  3. C. Conduct indirect assessments, such as interviews with the teacher and parents, and review relevant records. (Correct answer)
  4. D. Begin direct observation to identify the antecedents and consequences of the behaviors.

Correct answer: C

Explanation: Indirect assessments should precede direct observation. Gathering information from various sources (interviews, records) provides a preliminary understanding of the behavior, allowing for more focused direct observation. Options A and B are premature without a proper FBA. Option D, while important, is incomplete without the initial indirect assessment phase.

Sample Question 2 — Behavior Assessment

During a functional analysis, a 10-year-old client's self-injurious behavior (SIB) increases significantly when demands are placed on him, but not during free play or attention conditions. What is the MOST likely function of the SIB?

  1. A. Attention seeking
  2. B. Escape from demands (Correct answer)
  3. C. Sensory stimulation
  4. D. Access to tangible reinforcement

Correct answer: B

Explanation: The data clearly indicates that the SIB occurs most frequently during demanding tasks, suggesting escape as the primary function. Options A, C, and D are less likely given the specific results of the functional analysis.

Sample Question 3 — Behavior Assessment

A client's parent insists that their child's aggression is due to a medical condition, despite data suggesting a clear environmental trigger. What is the MOST ethical and professional response?

  1. A. Agree with the parent to avoid conflict and focus on behavior reduction strategies.
  2. B. Dismiss the parent’s concerns as irrelevant to the behavior assessment.
  3. C. Collaboratively review the assessment data and respectfully discuss the findings, while recommending a medical evaluation if appropriate. (Correct answer)
  4. D. Continue the assessment, focusing solely on the behavioral data while ignoring the parent's opinion.

Correct answer: C

Explanation: Ethical practice requires collaboration and respect for caregivers' perspectives, even when they differ from the data. The BCBA should present the data respectfully, acknowledging the parent's concerns and suggesting a medical evaluation if appropriate. Options A and D are unethical and compromise professional integrity; Option B is dismissive and unhelpful.

Sample Question 4 — Behavior Assessment

You're conducting an FBA for a client who exhibits property destruction. During direct observation, you notice the destruction happens only when the client is alone in their room. Which assessment method would provide the LEAST helpful information in this case?

  1. A. Direct observation in the client's room
  2. B. Interviews with caregivers and teachers (Correct answer)
  3. C. Functional analysis (analog assessment)
  4. D. Descriptive analysis (ABC data collection)

Correct answer: B

Explanation: While caregiver and teacher interviews provide valuable context, the behavior only occurring when the client is alone limits their usefulness in identifying immediate antecedents and consequences. Direct observation, functional analysis, and descriptive analysis would provide more relevant data about the behavior's function in the client's private space.

Sample Question 5 — Behavior Assessment

A client's self-injurious behavior (SIB) has decreased significantly following the implementation of a behavior intervention plan (BIP). However, the decrease is primarily observed in the therapy setting, not at home. What should the BCBA prioritize?

  1. A. Declare the intervention a success and move on to another case.
  2. B. Modify the BIP to include strategies for generalization across settings. (Correct answer)
  3. C. Conduct additional functional assessments to better understand the home environment.
  4. D. Continue the current BIP as the results are significant in at least one setting.

Correct answer: B

Explanation: The lack of generalization necessitates modifying the BIP to address the discrepancy between settings. Simply declaring success is premature and unethical. Additional assessments are helpful, but modifying strategies for generalization should be the immediate priority. Continuing the current plan without addressing generalization is insufficient.

Sample Question 6 — Behavior Assessment

You are conducting an FBA for a student who engages in disruptive vocalizations in the classroom. After several observations, you hypothesize that the vocalizations are maintained by teacher attention. Which experimental condition in a functional analysis would best test this hypothesis?

  1. A. Demand condition
  2. B. Alone condition
  3. C. Attention condition (Correct answer)
  4. D. Play condition

Correct answer: C

Explanation: The attention condition manipulates the availability of teacher attention. If the vocalizations increase during this condition, it supports the hypothesis that attention is the maintaining reinforcer. The other conditions help rule out other potential functions.

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