BCBA Board Certified Behavior Analyst Exam 2026/2027 Definitive Exam Preparation: Complete Study Guide, Targeted Practice Questions, and Final Test Bank Review

A learner is being taught to prepare a sandwich. The instructor completes every step except placing the top slice of bread, which the learner performs before receiving lunch. Additional earlier steps are then gradually transferred to the learner. Which procedure is being used? A. Forward chaining B. Backward chaining C. Total-task presentation D. Stimulus equivalence training Correct Answer: B. Backward chaining Rationale: Backward chaining begins instruction with the final step of a behavioral sequence. The instructor completes the earlier steps while the learner performs the last step, allowing immediate contact with the natural terminal reinforcer. Forward chaining begins with the first step, while total-task presentation involves practicing all steps during each teaching opportunity. DI. Question 2 A learner previously screamed because staff members provided attention. Staff members begin consistently withholding attention following screaming, and the behavior gradually decreases. Which intervention component is responsible for the reduction? A. Extinction B. Differential reinforcement of low rates C. Response cost D. Stimulus fading Correct Answer: A. Extinction Rationale: Extinction occurs when the reinforcement that previously maintained a behavior is discontinued. Because attention followed screaming, consistently withholding attention removes the maintaining consequence. Response cost removes an earned reinforcer, while stimulus fading changes antecedent stimulus control. DII. Question 3 A clinician identifies music as a highly preferred item. However, providing music after task completion does not increase the learner’s task completion. Which conclusion is most accurate? A. Music is a primary reinforcer B. Music is not functioning as a reinforcer in this arrangement C. The learner requires continuous reinforcement D. Preference automatically establishes reinforcing effectiveness Correct Answer: B. Music is not functioning as a reinforcer in this arrangement Rationale: A stimulus is considered a reinforcer only when its contingent presentation increases the future frequency of a behavior. Preference alone does not establish reinforcing effectiveness. Music may be highly preferred but still fail to reinforce task completion under the conditions described. DIII. Question 4 A student raises a hand primarily when a particular instructor is present because that instructor consistently calls on students who raise their hands. In this situation, the instructor’s presence functions as: A. An unconditioned stimulus B. A discriminative stimulus C. An abolishing operation D. A conditioned punisher Correct Answer: B. A discriminative stimulus Rationale: A discriminative stimulus (SD) signals that reinforcement is available for a particular behavior. The instructor’s presence indicates that hand-raising is likely to result in being called on. An abolishing operation changes the value of a reinforcer rather than signaling its availability. DIV. Question 5 A salesperson receives a commission after an unpredictable number of successful customer contacts. The salesperson maintains a high, steady rate of contacting potential customers. Which schedule most closely describes this arrangement? A. Fixed interval B. Variable interval C. Fixed ratio D. Variable ratio Correct Answer: D. Variable ratio Rationale: A variable-ratio schedule provides reinforcement after an unpredictable number of responses. It typically produces high, steady responding with relatively few pauses. Fixed-ratio schedules use a predictable response requirement, while interval schedules are based primarily on time. DV. Question 6 A therapist intends to use crackers as reinforcement. However, the learner has just finished a large meal and shows little interest in earning crackers. Which concept best explains the reduced effectiveness of the crackers? A. Establishing operation B. Abolishing operation C. Stimulus discrimination D. Response generalization Correct Answer: B. Abolishing operation Rationale: An abolishing operation decreases the current reinforcing value of a stimulus. Food satiation makes crackers less valuable as a reinforcer. In contrast, an establishing operation increases the value of a reinforcer, such as food deprivation increasing the value of food. DVI. Question 7 A therapist gives a learner 30 seconds of tablet access immediately after the learner independently requests a break. Across several sessions, independent break requests increase. Which behavioral process most directly explains this change? A. Positive reinforcement B. Negative reinforcement C. Positive punishment D. Extinction Correct Answer: A. Positive reinforcement Rationale: Positive reinforcement occurs when a stimulus is added following a behavior and the behavior subsequently increases. Tablet access was presented after the independent break request, and requesting increased. Negative reinforcement involves removing or reducing an aversive stimulus. DVII. Question 8 A behavior analyst reviews interviews, rating scales, direct observations, and antecedent-behavior-consequence records before proposing why aggression occurs. Which process is being conducted? A. Functional behavior assessment B. Functional analysis C. Stimulus preference assessment D. Reinforcer assessment Correct Answer: A. Functional behavior assessment Rationale: A functional behavior assessment (FBA) uses indirect and descriptive methods to identify variables that may be maintaining a behavior. Interviews, observations, and ABC data can help develop a functional hypothesis. A functional analysis experimentally manipulates conditions to demonstrate a functional relationship. DVIII. Question 9 A child hits a sibling during a game. The parent immediately removes the child’s gaming device for the remainder of the evening. Over several weeks, hitting decreases. Which procedure is illustrated? A. Negative reinforcement B. Positive punishment C. Negative punishment D. Response extinction Correct Answer: C. Negative punishment Rationale: Negative punishment involves removing a valued stimulus following a behavior, resulting in a decrease in that behavior. The gaming device was removed after hitting, and hitting subsequently decreased. Negative reinforcement also involves removing a stimulus, but it increases behavior. DIX. Question 10 A learner answers questions correctly only when the therapist points to the correct picture. Which intervention change should receive the highest priority? A. Increase the size of the pictures B. Introduce response cost for errors C. Systematically fade the pointing prompt D. Replace the pictures with verbal instructions Correct Answer: C. Systematically fade the pointing prompt Rationale: The learner’s responding is under prompt control rather than the intended instructional stimulus. Systematic prompt fading helps transfer stimulus control to the natural cues and promotes independent responding. Increasing picture size or using response cost would not directly address prompt dependency.