The selected data set involved five hundred students from test venues in several localities, responding to a multiple-choice test having sixty items, with four options per item. The average test score was 44.45 (74%).
Lertap revealed there were just five student pairs with an H-H index at 1.00 or above. These are shown in Table 13.
The “Correct” column in the table indicates the number of items a student answered correctly. For the first pair of students, respective exam scores were 34 (57% of 60, the total number of items) and 33 (55%). Of their 60 item responses, the first pair of students had 26 exact errors in common, and, over all sixty items, there was but a single difference in their responses.