In Term 1 (BOY), students answered by dragging and dropping the correct number (0–13) into the answer box. Because response times were slow at BOY, the task was changed in Term 3 (MOY) and Term 4 (EOY) to a multiple-choice format: students selected the correct answer from four options, with distractors generated from the most common BOY incorrect responses. As a result, the separate “speed test” used to familiarise students with the response format was no longer required at MOY/EOY.
Term 1 example
Term 3 / Term 4 example
| Term | Test name | Test ID | Students | Median items attempted | Median accuracy (%)* | Median correct / min |
|---|---|---|---|---|---|---|
| 1 | Addition drag and drop | AADD_2025 | 2343 | 6/40 | 100 | 7.14 |
| 3 | Addition Multiple Choice - New | AADD_2025-NEW | 1489 | 9/40 | 100 | 10.80 |
| 4 | Addition Multiple Choice - (MOY) | AAMC_2025-MOY | 1065 | 11/40 | 100 | 12.24 |
| * Accuracy is calculated after removing non-attempted items. |
Students in term 1 repeating the test in term 3 may have also contributed to faster RT distribution.
Warning: Removed 241 rows containing non-finite outside the scale range
(`stat_ydensity()`).Warning: Removed 241 rows containing non-finite outside the scale range
(`stat_boxplot()`).
Term 1 Drag n’ drop vs Term 3 multiple choice
Item discrimination (point-biserial) measures how well an item separates higher-ability from lower-ability students. Values above ~0.3 are typically “good”, below ~0.2 “weak”. In timed tests, late items can look artificially strong because only fast/able students reach them.
| Question ID | Question | Flag | No. response | % Correct | Median RT | 95th RT | Item discrim. |
|---|---|---|---|---|---|---|---|
| Term 1 – Addition drag and drop (AADD_2025) | |||||||
| AADD_001 | 2+1 | A1 | 2264 | 98.1 | 6.0 | 17.00 | 0.14 |
| AADD_002 | 1+4 | 1A | 2265 | 94.0 | 7.0 | 20.00 | 0.26 |
| AADD_003 | 4+0 | P0 | 2199 | 92.1 | 6.0 | 16.00 | 0.29 |
| AADD_004 | 3+3 | D | 2073 | 93.4 | 6.0 | 15.00 | 0.27 |
| AADD_005 | 4+6 | M10 | 1676 | 79.6 | 10.0 | 22.00 | 0.33 |
| AADD_006 | 8+1 | A1 | 1414 | 94.6 | 6.0 | 12.00 | 0.33 |
| AADD_007 | 2+3 | C | 1100 | 92.5 | 6.0 | 13.00 | 0.38 |
| AADD_008 | 9+1 | M10 | 893 | 97.1 | 4.0 | 8.00 | 0.35 |
| AADD_009 | 2+7 | C | 573 | 85.7 | 6.0 | 13.00 | 0.37 |
| AADD_010 | 7+5 | C | 279 | 69.2 | 7.0 | 14.40 | 0.34 |
| AADD_011 | 5+1 | A1 | 207 | 90.3 | 4.0 | 6.00 | 0.72 |
| AADD_012 | 1+3 | 1A | 135 | 91.9 | 3.0 | 5.00 | 0.73 |
| AADD_013 | 0+2 | P0 | 87 | 85.1 | 3.0 | 6.00 | 0.75 |
| AADD_014 | 4+4 | D | 55 | 83.6 | 3.0 | 6.00 | 0.76 |
| AADD_015 | 1+9 | M10 | 35 | 91.4 | 2.0 | 7.25 | 0.59 |
| AADD_016 | 7+1 | A1 | 26 | 76.9 | 3.0 | 7.20 | 0.50 |
| AADD_017 | 4+3 | C | 15 | 53.3 | 5.5 | 9.00 | NA |
| AADD_018 | 6+4 | M10 | 7 | 28.6 | 2.5 | 2.95 | NA |
| AADD_019 | 6+2 | C | 4 | 0.0 | NA | NA | NA |
| AADD_020 | 3+8 | C | 4 | 75.0 | 2.0 | 2.00 | NA |
| AADD_021 | 3+1 | A1 | 3 | 0.0 | NA | NA | NA |
| AADD_022 | 1+5 | 1A | 2 | 0.0 | NA | NA | NA |
| AADD_023 | 3+0 | P0 | 1 | 0.0 | NA | NA | NA |
| AADD_024 | 2+2 | D | 2 | 0.0 | NA | NA | NA |
| Term 3 – Addition Multiple Choice - New (AADD_2025-NEW) | |||||||
| AAMC-001 | 2+1 | A1 | 1465 | 98.4 | 4.0 | 14.00 | 0.17 |
| AAMC-002 | 1+4 | 1A | 1447 | 95.6 | 3.0 | 12.00 | 0.18 |
| AAMC-003 | 4+0 | P0 | 1431 | 94.2 | 3.0 | 8.00 | 0.23 |
| AAMC-004 | 3+3 | D | 1431 | 94.1 | 3.0 | 9.00 | 0.15 |
| AAMC-005 | 4+6 | M10 | 1342 | 80.7 | 7.0 | 21.00 | 0.27 |
| AAMC-006 | 8+1 | A1 | 1294 | 93.1 | 4.0 | 10.00 | 0.20 |
| AAMC-007 | 2+3 | C | 1195 | 93.1 | 4.0 | 10.00 | 0.21 |
| AAMC-008 | 9+1 | M10 | 1117 | 95.1 | 3.0 | 8.00 | 0.20 |
| AAMC-009 | 2+7 | C | 956 | 84.3 | 5.0 | 12.00 | 0.22 |
| AAMC-010 | 7+5 | C | 710 | 70.7 | 7.0 | 17.00 | 0.24 |
| AAMC-011 | 5+1 | A1 | 595 | 95.3 | 3.0 | 5.00 | 0.35 |
| AAMC-012 | 1+3 | 1A | 508 | 95.5 | 3.0 | 5.00 | 0.32 |
| AAMC-013 | 0+2 | P0 | 419 | 92.1 | 3.0 | 6.00 | 0.36 |
| AAMC-014 | 4+4 | D | 313 | 91.4 | 3.0 | 5.00 | 0.45 |
| AAMC-015 | 1+9 | M10 | 250 | 92.8 | 2.0 | 5.00 | 0.54 |
| AAMC-016 | 7+1 | A1 | 184 | 93.5 | 2.0 | 4.00 | 0.60 |
| AAMC-017 | 4+3 | C | 132 | 87.9 | 3.0 | 6.00 | 0.50 |
| AAMC-018 | 6+4 | M10 | 103 | 84.5 | 2.0 | 4.70 | 0.61 |
| AAMC-019 | 6+2 | C | 75 | 78.7 | 2.0 | 4.10 | 0.66 |
| AAMC-020 | 3+8 | C | 49 | 71.4 | 3.0 | 7.00 | 0.73 |
| AAMC-021 | 3+1 | A1 | 37 | 81.1 | 2.0 | 3.55 | 0.50 |
| AAMC-022 | 1+5 | 1A | 25 | 72.0 | 1.0 | 3.15 | 0.69 |
| AAMC-023 | 3+0 | P0 | 21 | 47.6 | 2.0 | 4.10 | 0.77 |
| AAMC-024 | 2+2 | D | 17 | 41.2 | 2.0 | 3.00 | NA |
| AAMC-025 | 2+8 | M10 | 8 | 37.5 | 2.0 | 2.00 | NA |
| AAMC-026 | 9+1 | A1 | 6 | 100.0 | 1.5 | 5.25 | NA |
| AAMC-027 | 2+4 | C | 3 | 0.0 | NA | NA | NA |
| AAMC-028 | 8+2 | M10 | 6 | 33.3 | 7.5 | 8.85 | NA |
| AAMC-029 | 3+5 | C | 3 | 0.0 | NA | NA | NA |
| AAMC-030 | 8+4 | C | 2 | 0.0 | NA | NA | NA |
| AAMC-031 | 4+1 | A1 | 2 | 100.0 | 1.0 | 1.00 | NA |
| AAMC-032 | 1+2 | 1A | 2 | 50.0 | 2.0 | 2.00 | NA |
| AAMC-033 | 0+5 | P0 | 1 | 100.0 | 2.0 | 2.00 | NA |
| AAMC-034 | 5+5 | D | 1 | 0.0 | NA | NA | NA |
| AAMC-035 | 3+7 | M10 | 1 | 0.0 | NA | NA | NA |
| Term 4 – Addition Multiple Choice - (MOY) (AAMC_2025-MOY) | |||||||
| AAMC-001-copy | 2+1 | A1 | 1 | 0.0 | NA | NA | NA |
| AAMC-006-copy | 8+1 | A1 | 1045 | 93.2 | 5.0 | 15.00 | 0.24 |
| AAMC-007-copy | 2+3 | C | 1028 | 91.8 | 4.0 | 13.00 | 0.19 |
| AAMC-008-copy | 9+1 | M10 | 1025 | 95.8 | 3.0 | 9.00 | 0.19 |
| AAMC-009-copy | 2+7 | C | 987 | 84.6 | 6.0 | 17.00 | 0.29 |
| AAMC-010-copy | 7+5 | C | 920 | 73.7 | 7.0 | 19.00 | 0.23 |
| AAMC-011-copy | 5+1 | A1 | 878 | 96.5 | 3.0 | 7.00 | 0.25 |
| AAMC-012-copy | 1+3 | 1A | 850 | 96.9 | 3.0 | 7.00 | 0.17 |
| AAMC-013-copy | 0+2 | P0 | 802 | 94.3 | 3.0 | 6.00 | 0.20 |
| AAMC-014-copy | 4+4 | D | 738 | 95.3 | 3.0 | 6.00 | 0.25 |
| AAMC-015-copy | 1+9 | M10 | 672 | 95.2 | 3.0 | 6.00 | 0.27 |
| AAMC-016-copy | 7+1 | A1 | 610 | 94.6 | 3.0 | 5.20 | 0.21 |
| AAMC-017-copy | 4+3 | C | 491 | 86.8 | 4.0 | 8.00 | 0.29 |
| AAMC-018-copy | 6+4 | M10 | 397 | 86.6 | 3.0 | 7.00 | 0.46 |
| AAMC-019-copy | 6+2 | C | 312 | 88.1 | 3.0 | 7.00 | 0.44 |
| AAMC-020-copy | 3+8 | C | 202 | 78.7 | 4.0 | 7.00 | 0.53 |
| AAMC-021-copy | 3+1 | A1 | 158 | 89.2 | 2.0 | 4.00 | 0.53 |
| AAMC-022-copy | 1+5 | 1A | 134 | 90.3 | 2.0 | 4.00 | 0.57 |
| AAMC-023-copy | 3+0 | P0 | 110 | 88.2 | 2.0 | 4.00 | 0.65 |
| AAMC-024-copy | 2+2 | D | 87 | 89.7 | 2.0 | 4.00 | 0.62 |
| AAMC-025-copy | 2+8 | M10 | 64 | 81.2 | 2.0 | 3.00 | 0.74 |
| AAMC-026-copy | 9+1 | A1 | 46 | 87.0 | 2.0 | 2.05 | 0.27 |
| AAMC-027-copy | 2+4 | C | 32 | 65.6 | 2.0 | 3.00 | 0.82 |
| AAMC-028-copy | 8+2 | M10 | 25 | 64.0 | 1.0 | 2.25 | 0.90 |
| AAMC-029-copy | 3+5 | C | 22 | 77.3 | 2.0 | 3.00 | 0.75 |
| AAMC-030-copy | 8+4 | C | 15 | 60.0 | 2.0 | 3.00 | NA |
| AAMC-031-copy | 4+1 | A1 | 13 | 84.6 | 1.0 | 2.00 | NA |
| AAMC-032-copy | 1+2 | 1A | 12 | 58.3 | 1.0 | 3.40 | NA |
| AAMC-033-copy | 0+5 | P0 | 8 | 62.5 | 2.0 | 2.00 | NA |
| AAMC-034-copy | 5+5 | D | 8 | 62.5 | 1.0 | 1.80 | NA |
| AAMC-035-copy | 3+7 | M10 | 7 | 28.6 | 1.5 | 1.95 | NA |
| AAMC-036-copy | 6+1 | A1 | 6 | 33.3 | 2.0 | 2.90 | NA |
| AAMC-037-copy | 3+2 | C | 6 | 33.3 | 1.5 | 1.95 | NA |
| AAMC-038-copy | 7+3 | M10 | 4 | 25.0 | 2.0 | 2.00 | NA |
| AAMC-039-copy | 5+4 | C | 6 | 50.0 | 2.0 | 2.90 | NA |
| AAMC-040-copy | 2+9 | C | 4 | 75.0 | 1.0 | 1.00 | NA |
| Flag | Question group |
|---|---|
| 1A | First Addend Is 1 |
| A1 | Second Addend Is 1 |
| C | Common |
| D | Double |
| M10 | Make Ten |
| P0 | One Addend Is 0 |
| Question group | Avg items attempted | No. response | % Correct | Median RT | 95th RT |
|---|---|---|---|---|---|
| Term 1 – Addition drag and drop (AADD_2025) | |||||
| Common | 1.8/12 | 1975 | 86.7 | 6 | 13 |
| Double | 1/4 | 2130 | 93.1 | 6 | 15 |
| First Addend Is 1 | 1.1/4 | 2402 | 93.8 | 6 | 20 |
| Make Ten | 1.5/8 | 2611 | 85.6 | 6 | 20 |
| One Addend Is 0 | 1/4 | 2287 | 91.8 | 6 | 16 |
| Second Addend Is 1 | 1.7/8 | 3914 | 96.2 | 5 | 15 |
| Term 3 – Addition Multiple Choice - New (AADD_2025-NEW) | |||||
| Common | 2.5/12 | 3125 | 84.2 | 5 | 13 |
| Double | 1.2/4 | 1762 | 93.1 | 3 | 8 |
| First Addend Is 1 | 1.4/4 | 1982 | 95.2 | 3 | 10 |
| Make Ten | 2/8 | 2827 | 87.3 | 4 | 16 |
| One Addend Is 0 | 1.3/4 | 1872 | 93.2 | 3 | 8 |
| Second Addend Is 1 | 2.4/8 | 3583 | 95.5 | 4 | 11 |
| Term 4 – Addition Multiple Choice - (MOY) (AAMC_2025-MOY) | |||||
| Common | 3.8/12 | 4025 | 83.8 | 5 | 15 |
| Double | 1.1/4 | 833 | 94.4 | 3 | 6 |
| First Addend Is 1 | 1.2/4 | 996 | 95.6 | 3 | 7 |
| Make Ten | 2.1/8 | 2194 | 92.8 | 3 | 7 |
| One Addend Is 0 | 1.1/4 | 920 | 93.3 | 3 | 6 |
| Second Addend Is 1 | 2.6/8 | 2757 | 94.0 | 3 | 11 |
