Q. The most extensively used scaling technique in educational research is ?
1. Nominal scale
2. Interval scale
3. Ratio scale
4. Ordinal scale
Correct Ans: (2)
Explanation: Interval scale is the most extensively used scaling technique in educational research. Interval scales provide not only a rank order of items but also the exact differences between the items. This makes them particularly useful for measuring various educational variables, such as test scores, where the differences between scores are meaningful and consistent. Unlike nominal and ordinal scales, interval scales have equal intervals between points but do not have a true zero point, differentiating them from ratio scales.
