TOEFL Speaking rubric to scaled score

In this post you will understand how ETS converts rubric scores to scaled scores in the Speaking section.

The Speaking section contains six questions, and each one is scored from 0 to 4 points without decimal values.

For example, you can obtain the following set of results [4,4,3,3,3,3]. Then, they calculate the average of the results (sum of the the six scores divided by number of elements):
(4+4+3+3+3+3) / 6 = 20 / 6 = 3.33
and the outcome (3.33) is converted to a 30 points scale. See the following table:

To learn which are the scoring standards for each question check this link: Speaking standards

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