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The validity of educational measurement of characteristics modelled in the structure of oppositional pairs is determined, among other things, on matching the rating scale to the properties of the operationalised variables. 270 people participated in the study of this issue. The results revealed the significance of the type of rating scale and its length in determining the results of characteristics measurement.

The Problem of Matching Rating Scales in Educational Measurement of Variables Modelled as Sets of Oppositional Pairs