Scales can be classified depending on their properties.
|
Class
|
Features
|
|
dimensional scale
|
monotonic ranked categories with equal intervals/magnitudes
|
|
ordinal scale
|
monotonic ranked categories with arbitrary magnitudes
|
|
quasi-dimensional
|
dimensional without discrete categories
|
|
binary (dichotomous) scale
|
2 categories
|
|
nominal scale
|
data element or variable; unranked categories with no magnitudes
|
where:
• A visual analogue scale (VAS) is an example of a quasi-dimensional scale.
