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Tuesday, January 15, 2013

Computer Adaptive Testing: The Pros and Cons - Nike Heels




Non-Traditional DomainsRecently, there have been developments aimed at using CAT in non-traditional domains foamposites for sale. For example, some preliminary research has hinted at the potential for using CAT to measure personality traits.

In addition to reducing assessment time, this approach has the potential advantage of reducing faking on such measures cole haan shoes. The same computer adaptive logic has been applied to performance measurement, with raters being presented new items based on ratings of previous items.

One can easily imagine a computer adaptive multi-rater feedback process wherein a group of raters converges on a more accurate competency measure in less time Nike Heels.Despite the development challenges, the many benefits of CAT in employee evaluation to both examinees and administrators alike ensure that this technology will see increasingly greater use in the future.

AdvantagesCAT offers a number of important advantages over traditional ability testing formats: Increased Accuracy: Each examinee takes a unique test that is tailored to his or her ability level nike dunks for sale. Questions that have low information value about the test taker's proficiency are avoided.

The result of this approach is higher precision across a wider range of ability levels. CAT provides accurate scores over a wide range of abilities while traditional tests are usually most accurate for average examinees. Challenge: Test takers are challenged by test items at an appropriate level. They are not discouraged or annoyed by items that are far above or below their ability level. Improved Test Security: Because each test is unique to the examinee, it is more difficult to capture the entire pool of items. Doing so would require the careful collaboration of many examinees of varying ability levels. Time Savings: Less time is needed to administer CAT than fixed-item tests because fewer items are needed to achieve acceptable accuracy. CAT reduces testing time by more than 50%, while maintaining a comparable level of reliability.LimitationsCAT has limitations and can be difficult to develop: CAT is not applicable for all subjects and skills, especially those in which the item response theory cannot be readily applied. Traditional ability tests are constructed to assess a specific ability; a limitation of CAT is that item constraints may result in an overly narrow selection of questions being presented to test takers. The constraints imposed in selecting the next question can, in practice, result in test takers completing sets of items that are broadly the samelosing the advantage over traditional tests. CAT requires careful item calibration. This, in turn, requires that extensive data be collected on a large item pool.

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