In this method the test is administered once on the sample and it is the most appropriate method for homogeneous tests. Hence, to overcome these difficulties and to reduce memory effect as well as to economise the test, it is desirable to estimate reliability through a single administration of the test. It may not be possible to use the same test twice and to get an equivalent forms of test. The above discussed two methods of estimating reliability sometimes seems difficult. Split-half method is an improvement over the earlier two methods, and it involves both the characteristics of stability and equivalence.
Split-Half Method or Sub-divided Test Method: For well-made standardised tests, the parallel form method is usually the most satisfactory way of determining the reliability.
Test scores of second form of the test are generally high.Īlthough difficult, carefully and cautiously constructed parallel forms would give us reasonably a satisfactory measure of reliability. Besides, the testes may not be in a similar physical, mental or emotional state at both the times of administration.Ħ. The testing conditions while administering the Form B may not be the same. That is why people prefer such methods in which only one administration of the test is required.ĥ. Moreover, administering two forms simultaneously creates boredom.
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