Often, scaled scores are reported if the psychological test that was used was longer and had several sub-tests within it. A scaled score typically tells us how well a child did on a specific sub-test, and a standard score typically tells us how well a child did on a broad domain which is often made of sub-tests. Scaled Scores have a score range of 0 — 19 points, with an average score of 10 points.
Scaled scores have a standard deviation a term briefly introduced above of 3 points. What does this mean? Simply put, most children of the same age will score between a 7 and 13, and thus fall within the low average 7 to high average range They are commonly used by testing companies that administer high stakes exams, such as admissions, certification and licensure exams.
Scaled scores are also used for K Common Core testing and other exams that assess student skills and evaluate learning progress. The first step to understanding scaled scores is to learn how they differ from raw scores. A raw score represents the number of exam questions you answer correctly. For example, if an exam has questions, and you get 80 of them correct, your raw score is A scaled score is a raw score that has been adjusted and converted to a standardized scale.
If your raw score is 80 because you got 80 out of questions correct , that score is adjusted and converted into a scaled score. Raw scores can be converted linearly or nonlinearly. The ACT is an example of an exam that uses linear transformation to convert raw scores to scaled scores.
The following conversation chart shows how raw scores from each section of the ACT are transformed into scaled scores. The scaling process creates a base scale that serves as a reference for another process known as equating. The equating process is necessary to account for differences between multiple versions of the same test. Although test makers try to keep the difficulty level of a test the same from one version to the next, differences are inevitable.
Equating allows the test maker to statistically adjust scores so that the average performance on version one of the test is equal to average performance on version two of the test, version three of the test and so on. After undergoing both scaling and equating, scaled scores should be interchangeable and easily comparable no matter which version of the test was taken.
Let's look at an example to see how the equating process can impact scaled scores on standardized tests. Imagine that say you and a friend are taking the SAT. You will both be taking the exam at the same test center, but you will be taking the test in January, and your friend will be taking the test in February. You have different testing dates, and there is no guarantee that you will both take the same version of the SAT. You may see one form of the test, while your friend sees another.
Although both tests have similar content, the questions are not exactly the same. Scaled scoring produces dramatically different outcomes than traditional scoring and requires a different mindset. To see why, consider the following example. Traditional v scaled score: an in-depth example Ten students take a challenging, question test. If this test were scaled and scored like the ACT, however, the scores would look like this: Ahmed: 28 90th percentile Benny: 25 80th percentile Carla: 70th percentile DeShawn: 60th percentile Eric: 20 50th percentile …and so on.
Meanwhile DeShawn, who did way worse than Carla, ends up with almost the same score she got because the rest of his classmates happened to fail even harder than he did! Traditional v scaled score: a difference in mindset Suppose the teacher in the above example had made the test easier, with the result that everybody got 10 more questions right.
Even if, for example, the test creators made the reading comp section, say, 10 minutes longer, then you and everybody else would get more questions right respectively.
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