A property that can be measured or manipulated in a study
Explication
A research variable is a property that can be measured or manipulated in a study, which is essential for conducting experiments and observing effects.
J. W. Krathwohl and D. R. Anderson
Explication
John W. Krathwohl and David R. Anderson are notable authors linked to research methodology in psychology, particularly experimental design fundamentals. The other options list authors who are not primarily associated with this specific topic.
Campbell & Stanley
Explication
Campbell & Stanley are well-known for their influential work on experimental design and control in research methodology, making them the correct answer. The other options are notable psychologists or researchers but are not specifically associated with foundational work on experimental research design.
To manipulate or vary for observing its effect on the DV
Explication
The independent variable is deliberately manipulated to observe its potential effect on the dependent variable, which distinguishes it from other variables. The other options describe different roles or misconceptions.
Dependent variable
Explication
The dependent variable is measured to assess the effect of the independent variable. Control and extraneous variables are managed or controlled to prevent bias, and confounding variables are uncontrolled extraneous factors.
Extraneous variables are additional factors that could influence the DV; confounding variables specifically affect the DV and are not controlled.
Explication
Extraneous variables are other factors that can influence the DV and need control, while confounding variables specifically distort the results because they affect the DV and remain uncontrolled.
Operationalisation
Explication
Operationalisation involves defining how variables are measured or manipulated in a study, which is crucial for clarity, replication, and validity.
To eliminate the effect of unrelated variables on the DV
Explication
Control variables are intentionally kept constant to prevent them from influencing the outcome, ensuring that any observed effect is due to the IV.
It ensures clear, measurable definitions of variables, enhancing replicability and validity.
Explication
Proper operationalisation ensures that variables are clearly and accurately defined in measurable terms, which is essential for consistent replication and validity of the research.
Mémorisez les réponses avec 9 flashcards sur Fundamentals of Psychological Research Methods.
Research variables — definition?
Elements manipulated or measured in a study.
Research variables — definition?
Factors manipulated or measured in studies.
Research design types — role?
Determine how variables are studied to establish causality or relationships.
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