By Narender Kumar Chadha
Applied Psychometry is designed as a middle textbook on perform of psychometry for undergraduate and post-graduate scholars of psychology and human source administration. it's going to aid the scholars of their research of the next papers:
- B.A. software Psychology (Core): mental overview
- B.A. Honors Psychology (Core): Psychology: Psychometry or mental review 1 and a pair of
- M.A. Psychology: mental review 1 and a pair of
- Human source administration: Recruitment and choice, mental Assessment
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Extra resources for Applied Psychometry (Sage Texts)
To the extent that the above properties are approximate, that is, approximately satisfied, the test reaches to the condition of a Power Test. 42 Applied Psychometry For a pure Power Test, the odd–even method to find split-half reliability should be employed. The odd–even reliability will become higher if it is used for Speed Test because Speed factor will enter more and more into the determination of test scores. Whether a test is sufficiently close to being a pure Power Test can be indicated by a criterion which would make one sure that the odd–even reliability will not be spuriously high or low.
According to Gulliksen, a pure Speed Test is a test composed of items so easy that the subjects never give the wrong answer to any of them, that is, there would be no attempted item that would be incorrect and, consequently, the score for each person would equal the number of items attempted. POWER TEST Power Tests, on the other hand, have time limits long enough to permit everyone to attempt all the items. But the difficulty of items is steeply graded and the test includes certain items which are too difficult for anyone to solve, so that no one can get a perfect score.
Personal Errors The third type of errors in measurement is called personal errors. These errors are due to subjective element of an individual. For example, if four persons sitting in a car are asked to read the speedometer, the difference in readings will be quite evident. Similarly, two persons evaluating and interpreting the same response do so quite differently because each has a unique perspective. In the same way, two testers evaluating one subject express their results differently and if the same subject takes the same test twice on different occasions, it gives different results.