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Test of sound measurement

7/13/2014

 
Test of practicality

Economy, convenience and interpretability are the three characteristics on the basis of which the feature of practicality of an instrument could be judged. 

According to economy characteristics, there should be some trade off between the ideal research projects and between what the budget could afford. Economic pressures are fast felt in length of measuring instrument. There surely are other items where the researcher could get more reliability, but in order to limit the interview or observation time, only few minutes are required for study purpose. Even data collection methods that are used are dependent on economic factors.

According to convenience characteristic there should be no complexity in administering the measuring instrument. There should be proper attention given to the right layout of the measuring instrument. For example the questionnaire is more effective and easy to complete if there are clear instructions given.

According to the interpretability characteristic, it is especially significant when other people and not the designers of test are involved to interpret the results. In order to make the measuring instrument interpretable, it must be supplemented by:

I. Complete instructions to administer the test
II. Scoring keys
III. Evidence about the reliability
IV. Proper guidance for using the test and to interpret the results of the test.

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