in research,a scale where equal intervals in the scale correspond to equal changes in the characteristic being measured, eg temperature scales (Celsius/Fahrenheit). Differences between objects can be analysed statistically (which is not possible with nominal or ordinal scales).
INTERVAL SCALE
Meaning of INTERVAL SCALE in English
Raynet Business and Marketing English glossary. Английский глоссарий компании Raynet Business and Marketing . 2012