![]() ![]() Once the two-half scores have been obtained for each individual, they may be correlated by the usual method. If the items were originally arranged in approximate order of difficulty, such a division yields nearly equivalent halfscores. In most tests, the first and second half would not be comparable owing to differences in nature and difficulty level of items.Ī procedure that is adequate for most purposes is to find the scores on odd and even-numbered test items. Then the product moment correlation between the two sets of scores gives the parallel-forms reliability coefficient for a test half as long as the original test.Ī notable problem arises in the split-half technique while splitting the test to obtain the most nearly comparable halves. ![]()
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