Table 3.

Scoring rubrics of the exhaustive tests 1 and 2.

Score	Rubric of exhaustive test 1	Rubric of exhaustive test 2
4	Answers cover all the four conditions: None, A, B, A + B.	The 15 chosen loc. Include: (1) One loc. in each of the 13 regions (except region 6). (2) One additional loc. in one of adjacent regions to City A. (3) One additional loc. in one of adjacent regions to City B.
3	Answers exclude None, OR exclude A or B.	At least 14 chosen loc. Match cases (1) and (2), or (1) and (3). At least 13 chosen loc. Match case (1) only.
2	Answers exclude A + B, OR exclude A + B and A or B, OR exclude None and A + B.	At least 2 loc. Match cases (2) and (3) above.
1	None of the above.	None of the above.

For the exhaustive test 1, the original rubric also evaluates whether students give a proper interpretation of submitted answers. Here, students are rescored based only on their saved conditions. “Loc.” stands for location.