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Normalized scores are distributed on a scale with a low of 120 to a high of 180. [31] The LSAT system of scoring is predetermined and does not reflect test takers' percentile. The relationship between raw questions answered correctly (the "raw score") and scaled score is determined before the test is administered, through a process called ...
A scaled score is the result of some transformation(s) applied to the raw score, such as in relative grading. The purpose of scaled scores is to report scores for all examinees on a consistent scale. Suppose that a test has two forms, and one is more difficult than the other. It has been determined by equating that a score of 65% on form 1 is ...
The reason for the choice of the number 21.06 is to bring about the following result: If the scores are normally distributed (i.e. they follow the "bell-shaped curve") then the normal equivalent score is 99 if the percentile rank of the raw score is 99; the normal equivalent score is 50 if the percentile rank of the raw score is 50;
Scores using this metric have historically been known as "raw" scores. Tests taken in October 2004 or later had a score range from 200 to 600. The median score was 400, with a standard deviation of 25 points. These scores, based on a normal curve, are known as "scaled" scores.
Only 50 are scored; the other 10 (randomly scattered throughout the exam) are used for experimental purposes. The raw score is converted to a "scaled score" based on the measured difficulty of the version of the test taken; the scaled score is used to determine passing scores. Scaled scores range between 50 and 150, with a median very close to 100.
For example, if the scale developer observes that raw scores 0-3 comprise 2% of the population, then these raw scores will be converted to a sten score of 1 and a raw score of 4 (and possibly 5, etc.) will be converted to a sten score of 2.
Scoring is based on a three-step process in which a student’s raw score is scaled based on the test version and then compared to the results of the test scores of normal students in the higher-level grade.
The University of Alberta in Edmonton, Alberta, Canada used the stanine system until 2003, when it switched to a 4-point scale. [3] In the United States, the Educational Records Bureau (they administer the "ERBs") reports test scores as stanines and percentiles. The New Zealand Council for Educational Research uses stanines. [4]
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