A research report states, "Heart rate was recorded using a cardiac monitor." This statement is an example of a(n)

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The operational definition describes how a concept or variable, such as effectiveness, will be measured in a study. A conceptual definition is incorrect because this is the "thinking definition" for a term or variable and it establishes the mental picture that the researcher wants associated with the term. Intervention protocol is incorrect because this is not a definition of terms but rather a protocol for a treatment or intervention that will be used in the study.

A Research Report States, "Heart Rate Was Recorded Using a Cardiac