Step 1:
Raw Score is calculated
Your raw scores are calculated
for each section based on the number of questions you answered correctly,
incorrectly, or that you omitted.
+3 points for questions you answered correctly
-1 point for questions answered incorrectly 0 points for questions you did not answer
This scoring methodology ensures that candidates are only awarded points for what they know, while having points deducted for inappropriate random guessing. This is a standard process in the testing industry and is a methodology employed in scoring similar admissions tests such as the Graduate Record Examination (GRE).
Equating is a statistical process used to
adjust scores on two or more alternate forms of an assessment so that the
scores may be used interchangeably. Industry standard processes were used for
equating, such as those outlined within the ETS Standards for Quality
and Fairness.
Step3: Equated Raw Score is “Scaled”
In order to ensure appropriate interpretation
of an equated raw score, the scores must be placed on a common scale or metric.
A linear transformation is used for this scaling process, which is an industry
standard practice (Kolen & Brennan, 2004).
The IIM scaling model is as follows:
Section Scores = 0 to 225
Total Exam Score = 0 to 450
Three scaled scores are presented for each
candidate: an overall scaled score and two separate scaled scores for each
section. As the two sections evaluate two distinct sets of knowledge and
skills, scores may not correlate across sections. A high score in one section
does not guarantee a high score in another section. Percentile rankings are
provided for each individual section as well as for the overall exam score.
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