Single-Case Design and Analysis
Experimental design questions focus on variables, validity, single-case logic, reversal, multiple baseline, multielement, changing criterion, and component analyses.
How to study for the BACB BCaBA exam
Treat each question as a supervised behavior-analytic service decision: define behavior, use data, stay within competence, implement function-based procedures, and coordinate supervision.
Core concepts
Concept 1
Single-Case Design and Analysis 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.
Repeated Measures
Single-case designs rely on repeated measures of behavior over time.
Reversal Design
A reversal design demonstrates control through systematic return or withdrawal when ethical and feasible.
Multiple Baseline
A multiple-baseline design staggers intervention across behaviors, settings, or participants.
Component Analysis
Component analysis examines which parts of a package contribute to change.
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
Monday during a day-program observation, Liam, age 3, is working on requesting a break; the team introduces intervention at different times across home, clinic, and school while baseline continues elsewhere. What is the most defensible next step?
In Ethan's maintenance check for using a functional communication card, the team observes withdrawing a successful safety procedure for repetitive question asking would create unacceptable risk. Which action best fits behavior-analytic practice?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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