1. This effectively transforms OPS into a 7-point ordinal scale . 2. This violates the axiom of transitivity for the ordinal scale . 3. The Mohs scale is a purely ordinal scale . 4. One limitation is that the MRC scale is an ordinal scale with disproportional distances between grades. 5. The authors conclude that monkeys can represent the numerosities 1 to 9 at least on an ordinal scale . 6. In fact, there may also appear phenomena which even question the ordinal scale level in Likert scales. 7. In particular, IQ scores reflect an ordinal scale , in which all scores are meaningful for comparison only. 8. Two concomitant scales are used : a continuous cardinal scale and a discrete ordinal scale ranging from 1 to 5. 9. The reason for this is that the rankings are ordinal scale numbers, and multiplication is not defined for ordinal numbers. 10. Objective tests have a restricted response format, such as allowing for true or false answers or rating using an ordinal scale .