How is the exam performance evaluated?
Psychometricians analyze every item after they are presented on a test. Statistical analysis is done to assess how well the item yielded useful information about candidate ability. Items that fail to perform properly increase the error of the exam and therefore do not contribute to the precision of the pass/fail decision made about candidates. Any item that performs poorly is flagged for possible deletion. Deletion of poorly performing items is done to create a more precise and fair examination. All comments from examinees are reviewed and considered.
The reliability and standard error of measurement are carefully evaluated for each exam. Each of the ABVLM exams to date have performed very well on these measures.
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