⊿ Point. {R} Glossary. ◢ Keyword: I. ◥ University. {q} PhD. {tr} Training. ⚫ UK. ↂ EndNote. ☝️ Weerakkody. Level of measurement. Distinction between nominal, ordinal, interval and ratio variables Level of measurement or scale of measure is a classification that describes the nature of information within the values assigned to variables.[1] Psychologist Stanley Smith Stevens developed the best-known classification with four levels, or scales, of measurement: nominal, ordinal, interval, and ratio.[1][2] This framework of distinguishing levels of measurement originated in psychology and has since had a complex history, being adopted and extended in some disciplines and by some scholars, and criticized or rejected by others.[3] Other classifications include those by Mosteller and Tukey,[4] and by Chrisman.[5] Stevens's typology[edit] Overview[edit] S.
Comparison[edit] Nominal level[edit] Examples of these classifications include gender, nationality, ethnicity, language, genre, style, biological species, and form.[6][7] In a university one could also use residence hall or department affiliation as examples. L. Nicholas R.