Page 84 - Development of Questionnaires for Quantitative Medical Research

interval and ratio. The brief explanation for each

scale is as follows:

● Nominal scale

The nominal scale uses numbers to represent

categorical data. Examples of nominal scales are

shown in Figure 3.2. These numbers should not be

added, subtracted or multiplied as it is merely a

coding for the categorical data it represents. There

is also no ascending or descending order for the

nominal scale.