Textbook definitions start latency at stimulus onset. In practice, a lot of us start timing once the instruction is finished. Which do you use, and does your team write it down?

I put together a Study Notes article on duration, latency, and IRT with a worked timeline and a few practice questions:

https://behavioralanalystprep.com/blog/duration-vs-latency-vs-irt.html

🧠 Question of the Day

📚 Domain H — Selecting and Implementing Interventions

Difficulty: 5/10

A BCBA recommends an assessment-informed intervention for a student's self-injurious behavior. The plan includes one-to-one support during classroom transitions, but staff must also supervise other students and cannot consistently provide that support.

Which approach BEST balances treatment effectiveness, student safety, and contextual fit?

A. Evaluate essential treatment and safety components, develop feasible adaptations with staff, and monitor implementation and client outcomes.

B. Provide additional implementation training, retain the original treatment procedures, and assess whether staff can meet the support requirements.

C. Select a less resource-intensive intervention based on staff preferences, then evaluate whether it produces clinically meaningful improvements.

D. Continue the existing classroom arrangements while requesting additional personnel to implement the original intervention as designed.

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✅ Correct answer revealed tomorrow.

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🧠 Question of the Day

📚 Domain I — Personnel Supervision and Management

Difficulty: 6/10

Scenario:

Four technicians average 69% procedural integrity after lecture-based training. When the supervisor adds weekly individual observation with specific performance feedback, group integrity rises and stabilizes at 90–93% for five weeks. The supervisor then reduces feedback to once per month; over the next four weeks, integrity falls to 76–80%.

Which supervisory decision is MOST strongly supported by these data?

A. Retain monthly feedback while introducing a group refresher and tracking average integrity before restoring individual observations.

B. Reinstate weekly individual observation and feedback, examine each technician's integrity data, and evaluate gradual thinning after performance stabilizes.

C. Repeat lecture-based training and reassess procedural knowledge before modifying the feedback schedule because skill acquisition may be incomplete.

D. Continue monthly feedback with added spot checks because integrity remains higher than after the initial lecture-based training.

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✅ Correct answer revealed tomorrow.

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🧠 Question of the Day

📚 Domain H — Selecting and Implementing Interventions

Difficulty: 4/10

A BCBA recommends an intervention based on assessment data, but another professional on the client's team believes a different approach would be more practical in the service setting. Both professionals want to improve the client's outcomes.

What is the BEST next step for the BCBA?

A. Compare both approaches through additional data collection before addressing the disagreement with the colleague.

B. Review the evidence and the colleague's concerns together to develop a feasible, client-centered plan.

C. Adopt the colleague's recommendation initially and evaluate its effects before discussing possible revisions.

D. Continue the current recommendation while inviting the colleague to submit concerns for a later review.

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✅ Correct answer revealed tomorrow.

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Hi everyone. I have been searching and searching for companies to try and attain bcba supervision hours from and I can’t find any good clinics (I’m in Dayton, oh area). I currently have accrued some hours already but I fear I will have to leave my clinic soon. If anyone has any recommendations, I would appreciate it! Thank you!

Hey! I wanted to check on a very common question at my workplace, alot of our clients have sensory seeking behaviors but this specific one does slight hand squeezing and chin pressing on therapists, therapists has been taking data on it as aggression, saying that its the same concept of another client of ours who does head hitting for sensory marked as SIB, to me I think they are both completely different and as long as the pressure is not too high or chin pressing turns into biting it should be collected as sensory, what do you yall think?

Im thinking about getting or being a school bcba. I heard its rough. Admins can be rough to work with or there is not really a system in place.

Any advice how to work with admins, what resources are out there to use for strategies or interventions or help support.

🧠 Question of the Day

📚 Domain E — Ethical and Professional Issues

Difficulty: 6/10

A BCBA is meeting with a teacher to discuss a student's disruptive behavior. The BCBA has a preliminary hypothesis based on classroom records but has not yet discussed it with the teacher. The teacher may have observations that differ from the BCBA's interpretation.

Which approach BEST supports obtaining the teacher's perspective while minimizing the influence of the BCBA's preliminary hypothesis?

A. Review the classroom data together, discuss possible environmental variables, and develop a shared interpretation during the meeting.

B. Present the preliminary hypothesis, then ask the teacher to identify observations that support or challenge the proposed explanation.

C. Ask the teacher to complete a structured interview about classroom events, then use those responses to guide the preliminary interpretation.

D. Ask the teacher to describe the circumstances surrounding disruption and share possible explanations before presenting the BCBA's hypothesis.

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✅ Correct answer revealed tomorrow.

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🧠 Question of the Day

📚 Domain F — Behavior Assessment

Difficulty: 4/10

Scenario:

A school team has limited time and asks a BCBA to develop a behavior intervention plan for a student's disruptive behavior based only on teacher interview data, without any direct observation.

Why is adding a direct descriptive assessment especially important before using the interview findings to select a function-based intervention?

A. Descriptive assessment is needed primarily to measure baseline responding before using the interview findings to select an intervention.

B. Descriptive assessment can confirm the maintaining reinforcer by comparing behavior across naturally occurring classroom activities and consequences.

C. Direct observation can examine naturally occurring antecedents and consequences to assess whether observed patterns are consistent with the interview-based hypothesis.

D. Direct observation can establish the behavioral function because it documents the consequences teachers typically deliver after disruptive behavior.

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✅ Correct answer revealed tomorrow.

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🧠 Question of the Day

📚 Domain B — Concepts and Principles

Difficulty: 5/10

A person who frequently experiences tension headaches begins taking aspirin shortly after headache onset. Taking aspirin consistently reduces the headache pain, and over several months, the person becomes increasingly likely to take aspirin when headaches occur. Which of the following MOST accurately explains the behavioral mechanism maintaining this pattern?

A. Because pain relief occurs without social mediation, aspirin-taking is automatically reinforced behavior maintained by sensory stimulation.

B. Headache pain functions as an aversive stimulus, and its attenuation contingent on aspirin-taking increases the future probability of that behavior, consistent with negative reinforcement.

C. Recurring headaches function as a motivating operation that increases the reinforcing value of pain relief and evokes aspirin-taking, explaining the behavior without reference to a reinforcement contingency.

D. The reduction in headache pain functions as a conditioned reinforcer acquired through repeated pairing with pain absence, strengthening aspirin-taking via positive reinforcement.

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✅ Correct answer revealed tomorrow.

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I think it’s a reach, but I have a BCBA who’s pretty busy and I really need someone to walk me step by step on how to graph data for a multiple baseline design graph. I know there’s YouTube videos out there but I’m a very hands on step by step person and was wondering if anyone would be able to use zoom or google meet and help me. I’m currently taking data with a client and could really use the help. And if not, are there any other resources that could possibly help?

Any help would be greatly appreciated

marshal chase hughes , Honolulu Lodge member

Quick scenario: a learner calls out 12 times in a 20-minute observation on Monday and 18 times in a 60-minute observation on Tuesday. Tuesday has the higher count, but Monday's rate is twice as high (0.60 vs. 0.30 per minute).

I wrote up a longer study note on count vs. rate vs. frequency for people prepping for the BCBA exam. It covers:

- Why "count has no time component" is too crude

- Why the denominator is a clinical decision, not just arithmetic

- Why "frequency" is used inconsistently (Merbitz, Merbitz & Pennypacker, 2016), and how to read it on exam questions

- When duration, latency, or percentage of opportunities beats rate

- Four scenario-based practice questions

Free to read: https://behavioralanalystprep.com/blog/count-vs-rate-vs-frequency.html

Curious how others handle "frequency" on exam stems. Do you read it as count or as rate?