Interval Scale:

An interval scale is a measurement scale that possesses all the characteristics of ordinal and nominal scales, but also allows for the comparison of the intervals or differences between values. On an interval scale, the distances between the values are equal throughout the entire range, but there is no true or meaningful zero point.

Characteristics of Interval Scale:

• Identity: Each value on the interval scale carries a unique label or identifier.
• Order: The values on the scale can be ordered or ranked in a meaningful way.
• Equal Intervals: The differences or intervals between adjacent values are equal throughout the scale.
• No True Zero Point: Unlike ratio scales, an interval scale does not have a true zero point. This means that the absence or lack of the measured attribute cannot be represented by a zero value.

Examples of Interval Scale:

Some common examples of interval scales include temperature (in Celsius or Fahrenheit), calendar dates, IQ scores, and the Likert scale used for attitude measurement. In all of these cases, the differences between adjacent values on the scale are equal, but there is no inherent zero point.