Single-Case Design Logic
Experimental design questions focus on variables, validity, threats, prediction, verification, replication, and design selection.
How to study for the BACB BCBA exam
Treat each question as a behavior-analytic case decision: define the behavior, inspect data and design logic, choose ethical function-based procedures, and manage supervision responsibly.
Core concepts
Concept 1
Single-Case Design Logic questions reward the answer that follows the official source, the professional role, and the stated facts.
Exam cue: Identify the candidate role, client or public risk, source rule, calculation, or process step being tested.
Concept 2
The strongest answer identifies the rule, safety concern, ethical duty, calculation, client factor, or process step before acting.
Exam cue: Check whether the fact pattern is using a national standard, jurisdiction rule, handbook policy, or scenario-specific instruction.
Concept 3
Eliminate answers that ignore requirements, skip documentation, overreach the role, or treat convenience as the standard.
Exam cue: Choose the compliant and professionally scoped answer before the convenient or familiar answer.
Risk pitfalls and guardrails
Treating related standards as interchangeable without checking the source.
Guardrail: Avoid answers that rely only on habit, ignore the stated source, skip safety or compliance steps, or choose convenience over the professional standard.
Skipping screening, documentation, authorization, sanitation, recordkeeping, or other required procedure.
Guardrail: Avoid answers that rely only on habit, ignore the stated source, skip safety or compliance steps, or choose convenience over the professional standard.
Choosing an answer that protects convenience instead of client safety, public protection, or the stated professional duty.
Guardrail: Avoid answers that rely only on habit, ignore the stated source, skip safety or compliance steps, or choose convenience over the professional standard.
Memory anchors
Dependent Variable
The dependent variable is the measured behavior expected to change.
Independent Variable
The independent variable is the intervention or condition manipulated by the analyst.
Internal Validity
Internal validity is confidence that the intervention caused the behavior change.
External Validity
External validity concerns generality across people, settings, responses, or conditions.
Prediction
Prediction estimates future behavior without intervention change.
Verification
Verification confirms baseline logic when behavior returns or remains stable as expected.
Replication
Replication repeats the effect to strengthen experimental control.
Design Selection
Design selection should match ethical constraints, behavior reversibility, and intervention goals.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
A BCBA varies the number of teaching trials and measures independent responses. What is the independent variable?
A study evaluates whether noncontingent attention reduces calling out. What is the dependent variable?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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