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Instead of specifying the Option Number directly, the instances must appear in order of their Option Numbers and a delta encoding is used between them.
The numbers in the left column of Table 2 refer to the option numbers given in Table 1, where a negative sign means that the option is not taken.
The findings were that all reductions in option numbers resulted in significant decreases in item difficulty (i.e. the items were made easier) and except in the case of a reduction from five to three options, resulted in significant changes in item discrimination ability (both increases and decreases).
However the findings in the main did not support the superiority of lower numbers of options for higher ability test takers, nor of higher option numbers for lower ability levels, and there was little difference in difficulty or reliability across the three formats.
The first approach to specifying multiple-choice option numbers might be termed traditional, where four or five options are used by convention [ 3].
This is prominent in medical education assessments despite studies advocating the benefits of using fewer or varied option numbers [ 5, 7].
Similar(51)
"Option number one is go back to Indonesia and option number two is [claim asylum] in Papua New Guinea.
Option number three would involve being more creative with quantitative easing, Keynes says.
More than 80 percent of the respondents chose option number four: "Careful, that plate is very hot".
Option number three would involve Scotland continuing to use the pound even if London said it couldn't.
Option number two is to assume that the three main Westminster parties mean what they say and quietly agree to accept whatever terms the Treasury and the Bank of England demand.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com