Single-Subject Research
Single-subject research, frequently referred to as small- design (where represents the statistical symbol for sample size), is a quantitative methodology that involves studying a small number of participants and focusing closely on each individual's behavior. Despite its name, this approach typically investigates between two and ten participants rather than just one. Serving as a crucial alternative to group research, particularly in applied areas of psychology, single-subject research seeks to comprehend objective behavior by utilizing strict experimental manipulation and control to collect highly structured data that is analyzed using quantitative techniques.
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Clinical Practice of Psychology
Psychology
Social Science
Empirical Science
Science
KPU
Research Methods in Psychology - 4th American Edition @ KPU
OpenStax Psychology (2nd ed.) Textbook
Related
Epidemiological Methods
Cross-Sectional vs. Longitudinal Approaches
Experimental Method
Mixed Designs
Strengths and Weaknesses of Research Methods
Quantitative Methods
Using qualitative research methods to improve clinical care in pediatric psychology
Qualitative Methods
Observation in Psychology
Correlational Research
Basic research vs. applied research
Single-Subject Research
Observational Studies
Randomized Controlled Trial (RCT) = Controlled Experiment
Criticisms of Quantitative Research
Group Research
Strengths of Quantitative Research
Single-Subject Research
Comparison of Qualitative and Quantitative Research
Characteristics of Survey Research
Which of the following statements best describes the methodology and primary objective of quantitative research in psychology?
Arrange the following phases of a typical quantitative research study in psychology in the correct chronological order, from the initial research design to the final objective.
A psychologist is conducting a study titled 'The Impact of Screen Time on Sleep Quality in Young Adults.' Match each element of this research project to the core characteristic of quantitative research it illustrates.
A researcher following the quantitative research methodology can deduce generalizable conclusions about a population by collecting numerical data from a sizable sample, even if they choose not to apply statistical techniques to analyze that data.
Quantitative research in psychology is characterized by starting with a specific research question, collecting numerical data from a sample of participants, and analyzing that data using statistical techniques.
Weaknesses of Quantitative Research
In the context of quantitative research, what is the primary purpose of collecting numerical data from a sizable sample of participants?
A researcher is critiquing a study that used a quantitative methodology. They judge the study to be ineffective not because of the numerical data itself, but because the non-representative sample was too small to support the methodology's primary objective: drawing _____ conclusions about the larger population.
A psychologist wants to design a quantitative study to investigate whether cognitive behavioral therapy reduces generalized anxiety. Match each component of their planned research project to the corresponding characteristic of quantitative research.
A cognitive psychologist studies working memory by collecting digit span scores from a large sample of 500 college students. If the researcher successfully analyzes these numerical scores but fails to select a representative sample, they will struggle to fulfill the primary objective of quantitative research, which is to deduce _____ conclusions about the larger population.
Evaluate the chronological and logical flow of a quantitative research study. Order the following steps from the initial phase of project formulation to the final realization of its overarching population-level goal.
Define quantitative research as it is used in psychology, and list the three main methodological steps researchers typically follow when employing this approach.
Explain how the researchers' actions in this scenario demonstrate the core components and the overarching primary objective of quantitative research.
Suppose you are designing a study to investigate the relationship between daily caffeine intake and self-reported stress levels. Briefly describe how you would structure this study so that it qualifies as quantitative research.
Types of Experimental Research
Basic Experimental Design Components
Interpreting Experimental Findings in Psychology
Reporting Research in Psychology
Weakness of Experimental Research: Artificial Settings
Ethical Constraints in Experimental Research
The Core Aim of Experimental Research
Primary Strength of Experimental Research: Establishing Causality
A researcher wants to test if a new note-taking strategy improves exam performance. They teach the new strategy to their morning class and the traditional strategy to their afternoon class. At the end of the unit, the morning class scores significantly higher on the exam. The researcher concludes that the new strategy causes better exam performance. Which of the following statements best analyzes the validity of this conclusion?
Falsifiability
Example of an Experiment: Lighting and Worker Productivity
Field Experiment
Inability to Manipulate Variables
Experimental Record Keeping
Non-Experimental Research
Quasi-Experimental Research
Comparison of Internal Validity Across Research Designs
Applications of Surveys
Laboratory Experiment
Single-Subject Research
Match each component of experimental research with its specific role or function in the study design.
A researcher wants to know whether a new memorization strategy causes higher quiz scores. She recruits 50 participants and allows each person to choose whether to use the new strategy or their usual approach. She then compares the average quiz scores of the two groups. This study qualifies as an experiment because it compares two groups on a measured outcome.
In experimental research, what is the primary objective of systematically manipulating an independent variable and randomly assigning participants to conditions?
Match each core component of experimental research with its specific role in the research process.
A researcher investigating the effect of exercise on mood assigns 50 participants to a high-intensity workout group and 50 participants to a stretching group by flipping a coin for each person. True or False: Because the researcher used randomized assignment and systematically manipulated the type of exercise, this study qualifies as experimental research.
To establish a causal relationship between two variables, a researcher must strictly adhere to the logic of experimental design. Arrange the following steps in the sequence required to ensure internal validity and support a causal inference.
In the context of experimental research, which of the following best describes the fundamental goal of exercising a high degree of 'control' over variables of interest?
A researcher claims their study demonstrates that one variable directly produces a change in another, but a reviewer notices that participants were not randomly assigned to conditions. In evaluating the research design, the reviewer concludes that the lack of randomization prevents the study from supporting a(n) _____ inference.
In experimental research, the variable that the researcher systematically manipulates to observe its effects on the dependent variable is called the _____ variable.
An investigator wants to design a study to test a causal hypothesis. Evaluate the logical flow of components in experimental research by ordering these steps from the initial establishment of control to the final research objective.
Define experimental research based on its core components. In your definition, list the key practices involved in control, assignment, and manipulation within this method, and state the primary objective of using this approach.
Explain how this study meets the definition of experimental research. Specifically, identify how the variables are handled (manipulated and measured), how participants are distributed, and what kind of conclusion the psychologist is equipped to draw based on this design.
Imagine you want to test the hypothesis that a new online tutoring platform improves math quiz scores in high school students. Apply the principles of experimental research to explain in 1-3 sentences how you would implement randomized assignment and systematic manipulation in this study.
Experiment (Psychological Research)
A psychologist designs a study to test whether listening to classical music while studying improves test performance. She recruits 80 undergraduate students, uses a random number generator to assign 40 students to study with classical music and 40 to study in silence, and administers the same 20-item algebra test to both groups in the same laboratory room under identical lighting and temperature.
Match each element of this study to the experimental component it represents.
A researcher investigates a new cognitive training program by comparing a group of volunteers who chose to participate in the program against a group of volunteers who chose not to. By conducting all sessions in the exact same laboratory room, under identical environmental conditions, and using identical testing materials, the researcher has established sufficient experimental control to confidently draw a causal inference that the training program caused any observed differences in cognitive performance.
Learn After
Process of Single-Case Designs
Uses of Single-Case Designs
Comparison of Single-Subject and Group Research
Comparison of Single-Subject Research and Case Studies
Intensive Focus on Individuals in Single-Subject Research
Early History of Single-Subject Research
Experimental Analysis of Behavior
Theoretical Perspectives in Single-Subject Research
Reversal Design
AB Design
Visual Inspection in Single-Subject Research
Statistical Analysis in Single-Subject Research
Assumptions of Single-Subject Research
Vance Hall's Study on Teacher Attention
Single-Subject Research Designs
Which of the following best characterizes the methodology of single-subject research?
True or False: In single-subject research, the investigator focuses on the behavior of each individual participant as a separate unit of analysis, typically involving between two and ten people in a study.
A psychology researcher is designing a study using a single-subject methodology. Match each specific scenario description below with the core principle of single-subject research it demonstrates.
A researcher is utilizing a single-subject design to analyze whether a specific behavioral intervention causes a reduction in a participant's off-task behavior. To establish experimental control and identify a functional relationship between the intervention and the behavior, arrange the following steps in the correct logical sequence.
A researcher wants to design a quantitative study to test whether a new behavioral intervention reduces the frequency of 'vocal tics' in 3 specific participants. To create a rigorous experiment following the principles of small- design, which of the following protocols should the researcher construct to establish experimental control and demonstrate the intervention's effect on each individual?
True or False: Single-subject research is a qualitative methodology that focuses on subjective experiences rather than utilizing quantitative techniques to analyze objective behavior.
A psychologist reviewing a single-subject (small-) study with only four participants must judge whether the researcher compensated for the absence of a large sample size by applying strict _____ and control over each individual's behavior to ensure scientific rigor.
Match each researcher's study scenario with the corresponding core feature of single-subject research it demonstrates.
A psychologist is analyzing a study that focuses closely on the behavior of four participants. To categorize this methodology, the psychologist notes that since the statistical symbol for sample size is represented by , this type of study is referred to as a small-_____ design.
An editor must evaluate whether a newly submitted manuscript qualifies as a single-subject research design based on its methodological characteristics. Arrange the evaluation steps in the logical order the editor should perform them, from identifying the broad research paradigm to verifying specific design controls.