Eight scaled scores are reported for students taking the ETS® Proficiency Profile test:
- a total score
- four skills subscores (critical thinking, reading, writing, mathematics)
- three context-based subscores (humanities, social sciences, natural sciences)
The total score is reported on a scale that extends from 400–500. The seven subscores are reported on a scale that extends from 100–130. It should be noted that the different subscores are not comparable to each other. For example, a score of 125 in reading on any edition of the ETS Proficiency Profile test is comparable to a score of 125 in reading on any other edition of the ETS Proficiency Profile test or on the Academic Profile. It is not comparable to a score of 125 in writing.
Each of the scaled scores is computed by a two-stage process.
- The student's "raw score" is computed by counting the number of questions the student answered correctly (there is no penalty for incorrect guessing).
- A raw-to-scale conversion table converts the raw score to a scaled score.
There is a separate raw-to-scale conversion table for each of the eight scaled scores — the total score, the skill area subscores and the context-based subscores. The conversion tables for each edition of the ETS Proficiency Profile test were determined by a statistical process called score equating, to make them comparable to scaled scores on the other editions of the ETS Proficiency Profile test and on the Academic Profile. The equating process adjusts the raw-to-scale conversion to compensate for differences in the difficulty of the questions.
The scaled scores are norm-referenced, i.e., intended for comparing individual students with a group and for comparing a group of students with other groups of students. These comparisons can be entirely within the institution, or they can involve data from other institutions, available in the Comparative Data Guide.
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