Difficulty: Medium

Average Score: 71%

A researcher decides to measure personality by using a personality inventory. The researcher is doing which of the following?

Rationale

Operationally defining a variable.

The researcher is specifying how the abstract concept of personality will be measured through a structured personality inventory. This process clarifies the variable being studied, allowing for empirical investigation and analysis.

A (Assigning participants randomly) YOUR ANSWER

Random assignment refers to the method of allocating participants to different groups in an experiment to ensure that each group is comparable. While this is a crucial step in experimental design to minimize bias, it is not directly related to the act of measuring personality, which involves defining and quantifying the variable of interest.

B (Operationally defining a variable) CORRECT

This choice correctly identifies the action of the researcher. By using a personality inventory, the researcher is operationally defining the concept of personality, translating it into measurable elements that can be analyzed statistically. This step is essential for ensuring that the research can produce reliable and valid results.

C (Conducting research using naturalistic observation) YOUR ANSWER

Naturalistic observation involves studying subjects in their natural environments without interference from the researcher. This method does not apply to the use of a personality inventory, as the latter typically involves structured questions or assessments rather than observing behavior in real-world settings.

D (Developing a hypothesis) YOUR ANSWER

Developing a hypothesis is the process of formulating a testable statement based on theoretical foundations. While hypotheses are essential for guiding research, the act of measuring personality through an inventory does not directly involve hypothesis formulation; instead, it focuses on operationalizing the variable being studied.

Conclusion

In summary, the use of a personality inventory exemplifies the operational definition of a variable, which is central to empirical research in psychology. By clearly defining how personality will be measured, the researcher establishes a foundation for analysis and interpretation of results. Other options, such as random assignment, naturalistic observation, and hypothesis development, represent different aspects of research methodology that do not pertain specifically to the measurement of personality.

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