An operational definition is one that defines a concept

AWith no relation to the underlying concept

BIn abstract, theoretical terms only

CIn terms of specific and empirical measures ✓ Correct

DIn terms of the researcher's personal opinion

Correct answer: (C) In terms of specific and empirical measures

Explanation

An operational definition specifies a concept in terms of the concrete, empirical measures used to observe it.

It states the exact procedures or operations by which a variable is measured.

Having no relation to the underlying concept would make the definition invalid.

Defining a concept only in abstract, theoretical terms gives a conceptual, not operational, definition.

Resting on the researcher's personal opinion makes the definition subjective and unmeasurable.

Operationalisation is what turns an abstract construct like intelligence into a test score.

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