Experimental Design
Internal validity and confounds
Evaluate whether behavior change can be attributed to the intervention or whether other concurrent changes compete as explanations.
Concept review facts
Use this block to decide whether the concept needs definition review, scenario practice, or missed-question repair.
What this concept means here
Evaluate whether behavior change can be attributed to the intervention or whether other concurrent changes compete as explanations.
How it appears in questions
Identify concurrent staff or setting changes as confounds.
Best next action
If this concept is weak, practice Experimental Design scenarios and write one correction rule after each miss.
How this shows up in scenario questions
- 1Identify concurrent staff or setting changes as confounds.
- 2Explain why replication strengthens causal confidence.
- 3Recognize limits of AB designs.
Common misconceptions
- Assuming any pre-post improvement proves intervention effect.
- Ignoring concurrent changes.
- Treating clinical usefulness as experimental control.
Distractor patterns
- Declare the intervention causal without replication.
- Dismiss all AB data as useless.
- Ignore treatment integrity and setting changes.
Self-check before more practice
Can you define it without using the term itself?
If not, pause and rewrite the definition in plain language before answering more scenarios.
Can you spot the clue in a scenario stem?
Look for the data, timing, function, stakeholder, or ethical constraint that makes this concept relevant.
Can you reject the closest distractor?
A concept is not stable until you can explain why a plausible wrong answer is weaker.
Related terms
confounding variablesexperimental controlthreats to validity
Turn this concept into practice
Use this page as a weak-area checkpoint: practice related scenarios, then review missed answers and save a study plan from your results.
Related study guides
Related practice prompts
Practice moreMeasurement validity and reliability: Measurement quality and procedural integrity.
A team reviews data on leaving the work area. The available record shows that escape follows the response on most trials, and task difficulty changed last week. The next program decision depends on whether the current data are trustworthy enough. Across 5 sessions in service week 4, one observer recorded 48 minutes of observation in the early intervention clinic. The BCBA should:
Representative measurement selection: Measurement quality and procedural integrity.
Two observers collect data on calling out during independent work, but their session notes show different definitions and missed opportunities to score responses. Across 6 sessions in service week 4, 2 observers recorded 49 minutes of observation in the elementary classroom. Before revising treatment, the BCBA should:
Procedural-integrity measurement selection: Measurement quality and procedural integrity.
A team reviews data on grabbing items from shelves. The available record shows that ABC notes show different consequences across stores. The next program decision depends on whether the current data are trustworthy enough. Across 4 sessions in service week 5, 2 observers recorded 52 minutes of observation in the community outing. The BCBA should:
Dependent and independent variables: Internal validity and confounds.
The team wants to evaluate a new procedure for using a clarification request, but withdrawing the current support could create safety concerns. Across 5 sessions in service week 5, 3 observers recorded 53 minutes of observation in the telehealth caregiver meeting. The BCBA should:
Internal and external validity: Measurement quality and procedural integrity.
A decrease in leaving the work area occurs during the same week that staff change prompts, reinforcement, and session length. Across 6 sessions in service week 5, one observer recorded 54 minutes of observation in the early intervention clinic. Before claiming the intervention caused the change, the BCBA should:
More concepts in this domain
Editorial transparency
Machine quality gatePublished by Bifang Studio. Content is maintained by internal editors with automated structure, coverage, and consistency checks. No content has been externally reviewed by a named, credential-verifiable BCBA; these checks do not certify clinical quality or exam validity.