Abstract: The present paper has used an empirical approach called the statistics of interval for designating value to qualifiers or classifiers semantics in dimensions associated with difference, goodness and certainty. 253 subje- cts have participated the work. In this paper several statistic indexes have been listed. They are membership function of fuzzy set, psychological scale value and fuzziness-grade, which correspond to each of qualifiers or cla- ssifiers. It will be demonstrated from the results obtained the given words are fuzzy concepts except for one of them. It has therefore been found that there are strict ordinal relations among them, distance of adja- cent two ordinal word is not equal, and fuzziness-grade for each of them is different.

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