Question 65

The researcher is operationally defining a variable.

By using a personality inventory, the researcher is operationally defining the concept of personality, which allows for measurable and quantifiable assessment of this abstract variable.

A) Assigning participants randomly

This option refers to a method of sampling participants for a study, which is not directly related to the act of measuring personality. Random assignment is important for experimental validity but does not pertain to the use of a personality inventory for measurement.

B) Operationally defining a variable

This choice is correct because operational definition involves specifying how a concept will be measured or defined in a study. In this case, using a personality inventory provides a clear method for quantifying the abstract construct of personality.

C) Conducting research using naturalistic observation

Naturalistic observation involves observing subjects in their natural environment without interference, which is distinct from the structured approach of using a personality inventory. This option does not relate to the measurement method being employed by the researcher.

D) Developing a hypothesis

While developing a hypothesis is a critical part of the research process, it does not specifically involve measuring personality. A hypothesis is a predictive statement that can be tested, but the act of measuring personality through an inventory is an operational definition rather than hypothesis formation.

Conclusion

The correct answer, operationally defining a variable, is crucial for the researcher as it allows for the measurement of personality through a standardized tool. The other options either refer to different aspects of research methodology or do not directly relate to the process of measurement. Thus, option B stands out as the most accurate representation of the researcher's actions.