The 'age' of a respondent is an example of a

AParallel variable

BMonadic variable ✓ Correct

CDyadic variable

DSimple variable

Correct answer: (B) Monadic variable

Explanation

The age of a respondent is a monadic variable, describing a single attribute of one individual unit.

A monadic variable attaches to one case at a time rather than to a relationship.

Parallel variable is not a standard classification in measurement.

A dyadic variable describes a property of a pair or a relationship between two units.

Simple variable is too vague to be the exact term for this individual level measure.

Age is also a ratio scale variable, since it has a true zero and equal intervals.

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