The question asks to identify the person credited with developing the four Levels of Measurement.
The four fundamental levels of measurement used in statistics and research methodology were conceptualized and defined by psychologist Stanley Smith Stevens. He formally proposed these levels in a 1946 publication in the journal Psychometrika.
Stevens identified the following four types of scales:
Therefore, Stanley Smith Stevens is the correct answer.
| LIST-I Measurement scale | LIST-II Definition | ||
| A. | Likert Scale | I. | Measures the meanings people create in response to a particular stimulus |
| B. | Semantic Differential scale | II. | Equal appearing intervals between adjacent points of a measurement scale |
| C. | Thurstone Scale | III. | Identifies the extent of a person's attitude towards a person or phenomenon |
| D. | Guttman Scale | IV. | Items are arranged along a continuum |
| LIST-I Scales of Measurement | LIST-II Characteristics |
| A. Nominal | I. Place items from least to most or lowest to highest |
| B. Ordinal | II. Precisely how far apart the items are |
| C. Ratio | III. Denotes the categories only |
| D. Interval | IV. Enables researcher to determine the proportions easily |