CLD 322 Chapter Notes - Chapter 7: Level Of Measurement, Isomorphism, Content Validity
23 Nov 2016
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Document Summary
Measurement is a procedure whereby a researcher assigns numerals either numbers or some other symbol to the empirical properties of variables according to a prescribed set of rules. For example, in many surveys, it is common practice to ask research participants to rate their current health using the following set of categories: very poor, poor, fair, good, excellent. Due to the inherent ordering in these categories, the researcher can assign numerical values to these respons es. In the current example, the researcher might assign codes ranging from 0 (very poor health) to 5 (excellent health). After assigning these values, the researcher can use these values to compare, evaluate and assess relationships between the properties measured. There are three basic concepts used to define measurement: numerals, assignments, and rules. A numeral is a symbol of the form i, ii, iii, . A numeral is not necessarily a number, as one might assume.
