Summary
A new version of Lertap with some support for detecting cheating was released in July, 2005. It featured the use of the H-H index, a descriptive statistic based on dividing the number of exact item response errors made by a given pair of students by their total number of response differences over all test items.
Previous research on the application of this index was promising, suggesting it to be a “powerful”
indicator of cheating. The results of the present research, however, have tended to refute the earlier findings, suggesting that the H-H index should be used, at best, with great caution.
Integrity and SCheck are other programs working in the area of cheating detection. Both have some limitations, but they have undoubted relevance and promise for users of multiple choice tests wanting to discern the possible presence of student collusion.
To circumvent the limitations of the H-H index highlighted by this research, present Lertap users should consider use of the SCheck interface built into version 5.5.
It is probable that all of the software systems mentioned in this paper will continue to improve. Another year might well see them with considerable enhancements, and, perhaps, fewer differences.
Summary
A new version of Lertap with some support for detecting cheating was released in July, 2005. It featured the use of the H-H index, a descriptive statistic based on dividing the number of exact item response errors made by a given pair of students by their total number of response differences over all test items.
Previous research on the application of this index was promising, suggesting it to be a “powerful”
indicator of cheating. The results of the present research, however, have tended to refute the earlier findings, suggesting that the H-H index should be used, at best, with great caution.
Integrity and SCheck are other programs working in the area of cheating detection. Both have some limitations, but they have undoubted relevance and promise for users of multiple choice tests wanting to discern the possible presence of student collusion.
To circumvent the limitations of the H-H index highlighted by this research, present Lertap users should consider use of the SCheck interface built into version 5.5.
It is probable that all of the software systems mentioned in this paper will continue to improve. Another year might well see them with considerable enhancements, and, perhaps, fewer differences.
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