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A cumulative scale where items are arranged hierarchically, determining the intensity of a given variable; used when each item implies the endorsement of all lower items.

Possesses all interval scale properties, with a true zero point; enables a full range of statistical operations; used when the data can be ordered, have equal intervals, and have a meaningful zero point.

Scale used for measuring subjective characteristics or attitudes that cannot be directly measured; involves marking a point along a line between two end-points.

Ranks data; can denote order of items but not the difference between them; used when categorizing variables that have a natural order.

A type of ordinal scale especially used in surveys to measure degrees of opinion or attitudes; consists of a series of statements with which respondents indicate agreement or disagreement.

Categorizes data without a numerical value; used for labeling variables without a quantitative value.

A type of ordinal scale where statements are graded by judges and assigned numerical values; used to measure attitudes by calculating the mean or median score of responses.

Numerical scale where intervals between numbers are consistent, but there is no true zero; used for variables that have order and a fixed measurement scale.

An interval scale used for measuring the meaning people ascribe to concepts or events, where respondents rate any concept on a series of bipolar adjectives.