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Single-Variable Research
A primary indication for using a non-experimental design is when the research question is focused entirely on measuring a single variable rather than analyzing a statistical relationship between two or more variables. In these cases, researchers must use non-experimental methods to simply observe and describe this single characteristic without attempting to manipulate it.
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Research Methods in Psychology - 4th American Edition @ KPU
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Single-Variable Research
Non-Causal Statistical Relationship
Practical or Ethical Constraints Requiring Non-Experimental Research
Broad and Exploratory Research
Which of the following situations makes non-experimental research the necessary and appropriate choice for a study?
Match each research scenario to the primary condition that makes a non-experimental design the appropriate choice.
A researcher wants to investigate whether experiencing a high-magnitude natural disaster leads to long-term post-traumatic stress symptoms. Arrange the logical steps the researcher would take to analyze and conclude that a non-experimental design is the necessary choice for this study.
When a researcher determines that a research question requires exploring the broad and subjective experiences of survivors of a natural disaster, they are making a scientifically sound judgment by choosing a non-experimental design, as the complexity of subjective experience is fundamentally incompatible with the variable manipulation required for an experiment.
You are tasked with proposing a novel research framework to investigate the 'psychological impact of being a long-term caregiver for a spouse with a chronic illness'. Given that you cannot ethically or practically manipulate the independent variables, which of the following proposals correctly synthesizes the scientific conditions necessary to justify a research design that avoids experimental manipulation?
A researcher must use an experimental design to study potential causal relationships, even when manipulating the independent variable is ethically or practically impossible.
A researcher wants to study the relationship between a person's birth order (e.g., being an only child vs. having siblings) and their level of extraversion. This study must use a(n) _____ design because birth order is a variable that the researcher cannot ethically or practically manipulate.
Read each research scenario and match it to the condition that makes a non-experimental design the appropriate choice for that study.
A social psychologist collects survey data showing that college students who report higher loneliness scores also tend to report lower academic motivation. Because loneliness was measured rather than manipulated, the researcher can establish only a _____ between the two variables and cannot rule out that a third variable—such as depression—accounts for both outcomes.
A researcher wants to study whether early childhood exposure to high levels of air pollution impairs cognitive development in school-age children. She must evaluate whether a non-experimental design is justified and select the best approach. Arrange the following evaluation steps in the correct logical order.
Describe the four distinct conditions under which non-experimental research is the appropriate or necessary choice instead of an experimental design, according to psychological research methods.
Based on the provided context, explain why Dr. Aris must use a non-experimental design for this study, identifying the specific constraint that prevents an experimental design.
A clinical psychologist wants to measure the prevalence of generalized anxiety disorder symptoms among incoming university freshmen using a standardized self-report scale. Apply your knowledge of research designs to state whether an experimental or non-experimental design is appropriate for this study, and justify your choice in one or two sentences.
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Example of Single-Variable Research: First Impressions
Which type of research design is required when a study is focused entirely on observing and describing a single variable without attempting to manipulate it?
A psychologist who wants to measure and describe the average number of hours per week that first-year university students spend on social media is studying a single variable. Because no relationship between two variables is being examined, a non-experimental research design is the appropriate choice for this study.
A researcher simplifies a study from 'comparing test scores between different majors' to only 'reporting the mean test score of all participants ().' The study is now classified as single-variable research because it focuses on the measurement of a ______ rather than an analysis of a statistical relationship.
A researcher proposes a study to calculate the 'mean score on a memory test' () for a group of adults and labels it an experiment. Arrange the steps you would take to evaluate this proposal and justify its classification as single-variable research.
Single-variable research is characterized by the measurement of one variable in isolation rather than the analysis of a statistical relationship between two or more variables.
Which of the following research goals best illustrates the primary indication for using a single-variable research design?
Match each research scenario to the type of research it represents based on the researcher's primary goal.
Match each psychology research scenario to the appropriate research design it exemplifies.
A researcher wants to study how accurate people's first impressions are. Because the study's research question is focused entirely on measuring a single characteristic without analyzing relationships or manipulating variables, the researcher must use a _____ design.
A student proposes a study to measure public speaking anxiety in a sample of college students. To determine whether this proposed study should be classified as single-variable research, order the steps you would take to evaluate the proposal, starting with the initial identification of the focus.