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Applied Behavior Analysis Research
Methods 2026-2027: 120 Practice Questions
on Single-Case Design, Measurement,
Validity & Ethics for BCBA Exam Prep
Description: Master ABA research methods for 2026- 2027 with 120 comprehensive multiple-choice questions covering single-case design, internal validity, IOA, measurement systems, ethics, and evidence-based practice. Complete answer keys and explanations included. An authoritative exam prep resource trusted by behavior analysis students. Download now to pass your comprehensive exam with confidence.
ABA Research Methods Exam 2026-2027 Study Guide
Instructions This examination consists of 120 multiple-choice questions covering foundational concepts in applied research methods, single-case design, measurement, validity, and evidence-based practice. Select the best answer for each question. Each question is worth two points. Section A: Foundations of Applied Research Question 1 Which of the following best describes the primary purpose of applied research? A. To develop theoretical frameworks without practical application B. To conduct systematic investigation aimed at acquiring knowledge in practical realms or solving real-world problems C. To establish philosophical principles of behavior without empirical testing D. To prioritize basic laboratory research over clinical application Answer: B Explanation: Applied research involves systematic investigation directed toward acquiring knowledge in practical domains or solving real-world problems, distinguishing it from basic research which focuses on theoretical understanding without immediate practical application. Question 2 A researcher manipulates the amount of praise a teacher delivers and measures its effect on student engagement. In this study, the amount of praise represents which variable? A. Dependent variable B. Confounding variable C. Independent variable D. Extraneous variable Answer: C Explanation: The independent variable is the experimental factor that is manipulated by the researcher to determine its effect on the outcome measure. In this example, praise amount is systematically changed to observe its impact on student engagement.
Answer: C Explanation: Skinner and Bijou developed a comprehensive system including philosophy, general theory, methods for translation to practice, and specific research methodology. Their approach emphasizes quantitative, experimental methods rather than qualitative approaches. Question 6 Which factor primarily differentiates an experimental design study from a quasi-experimental design study? A. The number of participants involved B. The extent to which the design controls for threats to internal validity C. The type of dependent variable measured D. The duration of the study Answer: B Explanation: Experimental and quasi-experimental designs differ primarily in the degree to which they control for threats to internal validity. Experimental designs use random assignment to control for alternative explanations, while quasi-experimental designs lack this feature. Question 7 In group design studies, which method of participant assignment to conditions is considered optimal? A. Convenience assignment B. Voluntary assignment C. Random assignment D. Sequential assignment Answer: C Explanation: Random assignment is the optimal method for assigning participants to study conditions because it helps ensure that groups are equivalent on key characteristics and controls for selection bias.
Question 8 Which research approach is characterized by participants serving as their own control, with each participant exposed to both baseline and intervention conditions? A. Group experimental design B. Correlational design C. Single-case design D. Qualitative design Answer: C Explanation: Single-case design (SCD) is a quantitative experimental approach in which participants serve as their own control, with each participant exposed to both baseline (control) and intervention conditions. Question 9 According to Horner et al. (2005), a practice in education is defined as which of the following? A. Any activity that occurs within a classroom setting B. A curriculum, behavioral intervention, systems change, or educational approach designed to produce measurable benefit C. A theoretical concept without empirical support D. An unplanned teaching strategy Answer: B Explanation: Horner et al. defined practice in education as a curriculum, behavioral intervention, systems change, or educational approach designed to be used by families, educators, or students with the expectation that implementation will result in measurable educational, social, behavioral, or physical benefit. Question 10 What determines the credibility of research findings according to contemporary standards? A. The number of participants in the study B. The recency of publication C. The rigor of the scientific method employed and extent to which design controls for
Explanation: History refers to events that occur during an experiment that are not related to planned procedural changes but may influence the outcome. The longer the study duration, the greater the threat from historical events. Question 13 When participants drop out of a study, and those who remain differ systematically from those who left, this represents which threat? A. Selection bias B. Sampling bias C. Attrition bias D. Testing bias Answer: C Explanation: Attrition bias refers to the likelihood that participant loss impacts study outcomes. When attrition occurs, researchers should explicitly report it along with relevant information about why it occurred. Question 14 A threat to internal validity that occurs when a participant's behavior is influenced by more than one planned treatment during a study is called: A. Sequential confounding B. Multiple treatment interference C. Procedural infidelity D. Data instability Answer: B Explanation: Multiple treatment interference occurs when a participant's behavior is influenced by more than one planned treatment, potentially resulting in interactive effects due to sequential confounding or carryover effects. Question 15 Referring to the likelihood that following an outlying data point, subsequent data will revert to levels closer to the average value describes which phenomenon? A. Data instability B. Cyclical variability
C. Regression to the mean D. Hawthorne effect Answer: C Explanation: Regression to the mean refers to the statistical phenomenon where extreme data points are likely to be followed by data points closer to the average value, which can be mistaken for treatment effects. Section C: Measurement and Data Collection Question 16 Which measurement procedure requires the observer to record an occurrence if the target behavior occurs at any time during the interval? A. Whole interval recording B. Partial interval recording C. Momentary time sampling D. Event recording Answer: B Explanation: Partial interval recording involves the observer recording an occurrence if the target behavior occurs at any time during the interval. This method tends to overestimate behavior occurrence. Question 17 For measuring low-frequency or short-duration behaviors, which measurement system is least appropriate when using interval lengths exceeding two minutes? A. Event recording B. Duration recording C. Momentary time sampling D. Whole interval recording Answer: C Explanation: Momentary time sampling is not recommended for behaviors that occur at low frequency or have short duration, especially when intervals exceed two minutes, as it may both overestimate and underestimate actual occurrence.
Explanation: Time per occurrence recording involves measuring the duration of each individual behavior instance by starting a timing device at behavior onset and stopping it at behavior offset. Section D: Single-Case Design Question 21 The three elements of baseline logic in single-case experimental designs include: A. Prediction, verification, and replication B. Description, prediction, and control C. Baseline, intervention, and maintenance D. Observation, measurement, and analysis Answer: A Explanation: Baseline logic entails three elements: prediction (what would happen without intervention change), verification (showing baseline performance would continue), and replication (repeating the effect). Question 22 Which single-case design involves repeating the basic A-B comparison within a single participant through sequential introduction and withdrawal? A. Multiple baseline design B. Alternating treatments design C. A-B-A-B design D. Changing criterion design Answer: C Explanation: The A-B-A-B design is a sequential introduction and withdrawal design that repeats the basic A-B comparison within a single participant, providing within-study replication.
Question 23 When a researcher repeats an experimental effect with different participants to determine whether uncontrolled variables might prevent successful replication, this is known as: A. Clinical replication B. Systematic replication C. Intra-participant direct replication D. Inter-participant direct replication Answer: D Explanation: Inter-participant direct replication involves repeating the experimental effect with different participants to determine whether uncontrolled or unknown variables might prevent successful replication. Question 24 What is the minimal acceptable number of direct replications typically required to determine a functional relationship in single-case research? A. One replication B. Two replications C. Three replications D. Five replications Answer: C Explanation: Three direct replications is generally considered the minimal acceptable number to determine a functional relationship, though researchers should consider baseline stability, consistency of effect, magnitude of effect, and adequacy of internal validity controls. Question 25 Which single-case design is most appropriate for non-reversible dependent variables such as academic behaviors? A. A-B-A-B reversal design B. Multiple probe design C. Withdrawal design D. Reversal design Answer: B
Question 28 According to Baer, Wolf, and Risley (1968), the best test for evaluating a procedure description as technological is: A. Whether the procedure produces statistically significant results B. Whether a typically trained reader could replicate the procedure to produce the same results given only a reading of the description C. Whether the procedure has been published in a peer-reviewed journal D. Whether the procedure has been used in at least three previous studies Answer: B Explanation: Baer, Wolf, and Risley stated that the best test for evaluating a procedure description as technological is to ask whether a typically trained reader could replicate the procedure well enough to produce the same results, given only a reading of the description. Question 29 What level of risk is considered the same as what a person would encounter in daily life or during routine physical or psychological examinations? A. Negligible risk B. Minimal risk C. Low risk D. Acceptable risk Answer: B Explanation: Minimal risk is defined as the risk that a person would encounter in daily life or while performing routine physical or psychological examinations. Question 3 0 Which entity is responsible for reviewing proposed research studies to ensure the highest level of protection for human participants? A. Institutional Review Board (IRB) B. American Psychological Association (APA) C. National Institutes of Health (NIH) D. Food and Drug Administration (FDA) Answer: A
Explanation: The Institutional Review Board (IRB) was developed following atrocities such as the Nuremberg War Crime Trials and the Tuskegee Study to ensure protection for human participants in research studies. Section F: Research Questions and Literature Review Question 31 A research question that follows the form "what relations exist between an independent variable and a behavior for a given set of participants?" is known as which type? A. Parametric question B. Comparative question C. Demonstration question D. Component analysis question Answer: C Explanation: A demonstration question asks "does it work?" and follows the form of examining what relations exist between an independent variable and a behavior for given participants. Question 32 Which type of research question focuses on the amount of independent variable and the effects of various amounts on behavior? A. Demonstration question B. Parametric question C. Comparative question D. Component analysis question Answer: B Explanation: Parametric questions focus on whether more or less of a procedure works better, examining the amount of the independent variable and the effect of those various amounts on behavior.
Explanation: A systematic review is defined as an attempt to make the research summarizing process explicit and systematic to ensure the author's assumptions, procedures, evidence, and conclusions are transparent. Section G: Social Validity and Procedural Fidelity Question 36 Wolf recommended evaluating social validity at three levels. These levels are: A. Participants, setting, and outcomes B. Goals, procedures, and outcomes C. Baseline, intervention, and maintenance D. Efficiency, effectiveness, and acceptability Answer: B Explanation: Wolf recommended three levels of social validation: goals (are the goals socially important?), procedures (are the procedures socially acceptable?), and outcomes (are the outcomes socially significant?). Question 37 The degree to which procedures of all experimental conditions are implemented as intended is called: A. Treatment integrity B. Procedural fidelity C. Implementation fidelity D. All of the above Answer: D Explanation: Procedural fidelity, also known as treatment integrity or implementation fidelity, refers to the degree to which procedures of all experimental conditions are implemented as intended.
Question 38 Which method for measuring procedural fidelity typically has the lowest validity because implementers tend to overestimate accuracy of their own behaviors? A. Direct systematic observation B. Permanent product review C. Self-report D. Checklist completion Answer: C Explanation: Self-reports typically have low validity for measuring fidelity because implementers tend to overestimate the accuracy of their own behaviors. Question 39 Which method for assessing social validity involves comparing targeted behavior to a typical group whose behavior is considered acceptable? A. Participant preference measurement B. Blind ratings C. Normative comparisons D. Maintenance measurement Answer: C Explanation: Normative comparisons involve comparing the participant's targeted behavior to a normative or typical group whose behavior is considered acceptable. Question 40 Which approach to measuring social validity determines whether participants' behavior is rated as different before and after intervention by people unaware of the condition in effect? A. Normative comparisons B. Maintenance measurement C. Participant preference D. Blind ratings Answer: D
Answer: B Explanation: A Type I error occurs when a researcher incorrectly rejects a true null hypothesis, leading to the conclusion that an effect or relationship exists when it does not (false positive). Question 44 The probability of correctly rejecting a false null hypothesis is known as: A. Alpha level B. Beta level C. Power D. Effect size Answer: C Explanation: Power is the ability of a statistical test to correctly reject a false null hypothesis, thus avoiding a Type II error. Power is influenced by sample size, effect size, and alpha level. Question 45 Which interval-based recording method tends to underestimate behavior occurrence and is typically used when measuring behaviors targeted for increase? A. Partial interval recording B. Whole interval recording C. Momentary time sampling D. Event recording Answer: B Explanation: Whole interval recording tends to underestimate behavior occurrence because the behavior must occur throughout the entire interval to be recorded. It is typically used when measuring behaviors targeted for increase.
Section I: Applied Research Applications Question 46 The What Works Clearinghouse (WWC) provides which of the following to stakeholders? A. Funding for educational research projects B. A source of information regarding scientific evidence of effectiveness for education practices C. Training for education researchers D. Curriculum development resources Answer: B Explanation: The What Works Clearinghouse (WWC), established by the US Department of Education's Institute of Education Sciences, informs stakeholders by providing information regarding scientific evidence of effectiveness for education practices to encourage informed, data-based decisions. Question 47 A classroom teacher wants to evaluate whether a token economy reduces disruptive behavior for a specific student who exhibits frequent outbursts. Which research methodology is most appropriate? A. Group experimental design B. Correlational design C. Single-case design D. Qualitative design Answer: C Explanation: Single-case design is most appropriate when the goal is to evaluate intervention effects for an individual participant, with repeated measurement and the participant serving as their own control. Question 48 Which type of graphic display is most appropriate for showing summative data and comparative information where the height of the bar indicates the magnitude of the data? A. Line graph B. Cumulative graph
