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awej 5 no.4 full issue 2014

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AWEJ Volume.5 Number.4, <strong>2014</strong>Fair, Reliable, Valid: Developing a Grammar Test UtilizingEfeotorMike OrrTable 7.Item details for the grade 11 studentsA comparison between the two age groups is made easier using a scatter plot as shown in Figure6.Figure 6.Scatter Plot showing grade 9 and grade 11 resultsThe scatter plot confirms that overall there was no bias in the test towards either of the twogrades. However, items 17 and 18 were relatively more difficult for the grade 11 students. Bothof these items have a high difficulty level on the test. With only a very small number of studentsgetting the items correct it cannot be said that the items were biased. The DIF graph which isArab World English Journalwww.<strong>awej</strong>.org 219ISSN: 2229-9327

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