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, two new formats were introduced in Term 3 (MOY) and Term 4 (EOY): multiple choice and tap-tap.
Roughly half of the students who participated in Term 3/4 did multiple choice and the other half did tap-tap (BUT was incorrectly labelled as drag and drop / D&D).
Term 1 example - drag and drop
Term 3 / Term 4 example - multiple choice
Term 3 / Term 4 example - tap-tap
| Term | Test name | Test ID | Students | Median items attempted | Median accuracy (%)* | Median correct / min |
|---|---|---|---|---|---|---|
| 1 | Subtraction drag and drop | ASDD_2025 | 2313 | 5/30 | 80.0 | 4.14 |
| 3 | Subtraction multiple choice 2025 new | ASDD_2025_NEW | 784 | 7/30 | 88.9 | 6.67 |
| 3 | Subtraction drag and drop | ASDD_2025 | 490 | 5/30 | 93.1 | 5.22 |
| 4 | Subtraction MC (MOY) | ASMC_MOY | 1063 | 9/30 | 91.7 | 8.57 |
| * Accuracy is calculated after removing non-attempted items. |
Note “T3 Sub. D&D” is actually tap-tap, not drag n’ drop.
Warning: Removed 219 rows containing non-finite outside the scale range
(`stat_ydensity()`).Warning: Removed 219 rows containing non-finite outside the scale range
(`stat_boxplot()`).
Term 1 Drag n’ Drop vs Term 3 Tap-tap vs Term 3 Multiple Choice
Note Term 3 tap-tap is labelled as D&D
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 – Subtraction drag and drop (ASDD_2025) | |||||||
| ASDD_001 | 5-1 = | A1 | 2243 | 82.7 | 8.0 | 24.00 | 0.33 |
| ASDD_002 | 3-2 = | D1 | 2172 | 70.2 | 9.0 | 23.00 | 0.41 |
| ASDD_003 | 6-4 = | C | 1920 | 63.4 | 12.0 | 27.00 | 0.42 |
| ASDD_004 | 5-5 = | D0 | 1683 | 60.4 | 7.0 | 17.00 | 0.47 |
| ASDD_005 | 5-2 = | M5 | 1297 | 77.6 | 7.0 | 16.00 | 0.53 |
| ASDD_006 | 10-6 = | M10 | 851 | 73.1 | 8.0 | 16.00 | 0.53 |
| ASDD_007 | 4-3 = | D1 | 558 | 75.8 | 6.0 | 11.00 | 0.60 |
| ASDD_008 | 6-3 = | D | 376 | 74.7 | 5.0 | 9.00 | 0.68 |
| ASDD_009 | 2-0 = | D0 | 278 | 72.7 | 5.0 | 8.00 | 0.53 |
| ASDD_010 | 7-3 = | C | 151 | 71.5 | 6.0 | 13.00 | 0.67 |
| ASDD_011 | 2-1 = | A1 | 115 | 72.2 | 3.0 | 6.90 | 0.82 |
| ASDD_012 | 5-2 = | M5 | 79 | 68.4 | 3.0 | 6.00 | 0.85 |
| ASDD_013 | 8-6 = | C | 54 | 55.6 | 4.0 | 7.00 | 0.85 |
| ASDD_014 | 3-3 = | D0 | 41 | 53.7 | 3.0 | 5.90 | 0.81 |
| ASDD_015 | 5-4 = | D1 | 28 | 50.0 | 2.5 | 3.00 | 0.98 |
| ASDD_016 | 10-7 = | M10 | 20 | 45.0 | 4.0 | 13.80 | 0.84 |
| ASDD_017 | 3-2 = | D1 | 12 | 41.7 | 3.0 | 4.60 | NA |
| ASDD_018 | 8-4 = | D | 9 | 33.3 | 3.0 | 4.80 | NA |
| ASDD_019 | 4-0 = | D0 | 8 | 25.0 | 2.0 | 2.00 | NA |
| ASDD_020 | 6-3 = | D | 8 | 37.5 | 2.0 | 2.90 | NA |
| ASDD_021 | 4-1 = | A1 | 4 | 25.0 | 2.0 | 2.00 | NA |
| ASDD_022 | 6-2 = | C | 2 | 0.0 | NA | NA | NA |
| ASDD_023 | 7-5 = | C | 2 | 0.0 | NA | NA | NA |
| ASDD_024 | 4-4 = | D0 | 2 | 0.0 | NA | NA | NA |
| ASDD_025 | 5-3 = | M5 | 2 | 0.0 | NA | NA | NA |
| ASDD_026 | 10-4 = | M10 | 2 | 50.0 | 8.0 | 8.00 | NA |
| ASDD_027 | 4-2 = | D | 1 | 100.0 | 5.0 | 5.00 | NA |
| ASDD_028 | 10-5 = | D | 1 | 100.0 | 9.0 | 9.00 | NA |
| ASDD_029 | 3-0 = | D0 | 1 | 0.0 | NA | NA | NA |
| Term 3 – Subtraction drag and drop (ASDD_2025) | |||||||
| ASDD_001 | 5-1 = | A1 | 422 | 82.9 | 8.0 | 22.00 | 0.32 |
| ASDD_002 | 3-2 = | D1 | 405 | 78.0 | 8.0 | 20.25 | 0.31 |
| ASDD_003 | 6-4 = | C | 391 | 71.6 | 11.0 | 26.05 | 0.36 |
| ASDD_004 | 5-5 = | D0 | 356 | 71.3 | 6.0 | 13.00 | 0.40 |
| ASDD_005 | 5-2 = | M5 | 301 | 84.1 | 7.0 | 17.00 | 0.40 |
| ASDD_006 | 10-6 = | M10 | 206 | 85.4 | 7.0 | 16.25 | 0.32 |
| ASDD_007 | 4-3 = | D1 | 153 | 87.6 | 5.0 | 11.00 | 0.45 |
| ASDD_008 | 6-3 = | D | 111 | 83.8 | 5.0 | 9.00 | 0.31 |
| ASDD_009 | 2-0 = | D0 | 85 | 88.2 | 4.0 | 7.30 | 0.18 |
| ASDD_010 | 7-3 = | C | 48 | 87.5 | 5.0 | 14.00 | 0.49 |
| ASDD_011 | 2-1 = | A1 | 35 | 88.6 | 3.0 | 7.50 | 0.56 |
| ASDD_012 | 5-2 = | M5 | 25 | 96.0 | 3.0 | 4.00 | 0.51 |
| ASDD_013 | 8-6 = | C | 15 | 86.7 | 4.0 | 7.40 | NA |
| ASDD_014 | 3-3 = | D0 | 14 | 85.7 | 3.5 | 4.90 | NA |
| ASDD_015 | 5-4 = | D1 | 6 | 83.3 | 3.0 | 4.60 | NA |
| ASDD_016 | 10-7 = | M10 | 6 | 66.7 | 2.0 | 2.85 | NA |
| ASDD_017 | 3-2 = | D1 | 2 | 50.0 | 2.0 | 2.00 | NA |
| ASDD_018 | 8-4 = | D | 1 | 100.0 | 2.0 | 2.00 | NA |
| ASDD_019 | 4-0 = | D0 | 3 | 100.0 | 4.0 | 7.60 | NA |
| ASDD_020 | 6-3 = | D | 1 | 100.0 | 2.0 | 2.00 | NA |
| ASDD_021 | 4-1 = | A1 | 2 | 100.0 | 3.0 | 3.90 | NA |
| ASDD_022 | 6-2 = | C | 1 | 100.0 | 2.0 | 2.00 | NA |
| ASDD_024 | 4-4 = | D0 | 1 | 100.0 | 7.0 | 7.00 | NA |
| ASDD_027 | 4-2 = | D | 1 | 100.0 | 6.0 | 6.00 | NA |
| Term 3 – Subtraction multiple choice 2025 new (ASDD_2025_NEW) | |||||||
| ASMC_001 | 5-1 = | A1 | 768 | 80.6 | 5.0 | 16.10 | 0.33 |
| ASMC_002 | 3-2 = | D1 | 745 | 78.5 | 6.0 | 15.80 | 0.32 |
| ASMC_003 | 6-4 = | C | 720 | 75.6 | 9.0 | 25.00 | 0.34 |
| ASMC_004 | 5-5 = | D0 | 717 | 69.9 | 4.0 | 11.00 | 0.40 |
| ASMC_005 | 5-2 = | M5 | 630 | 85.2 | 6.0 | 14.00 | 0.41 |
| ASMC_006 | 10-6 = | M10 | 532 | 79.1 | 6.0 | 16.00 | 0.32 |
| ASMC_007 | 4-3 = | D1 | 435 | 82.3 | 6.0 | 14.15 | 0.36 |
| ASMC_008 | 6-3 = | D | 341 | 84.5 | 4.0 | 10.00 | 0.39 |
| ASMC_009 | 2-0 = | D0 | 298 | 84.2 | 3.0 | 7.00 | 0.15 |
| ASMC_010 | 7-3 = | C | 201 | 79.6 | 5.0 | 11.05 | 0.38 |
| ASMC_011 | 2-1 = | A1 | 151 | 75.5 | 3.0 | 6.00 | 0.58 |
| ASMC_012 | 5-2 = | M5 | 115 | 77.4 | 4.0 | 7.60 | 0.58 |
| ASMC_013 | 8-6 = | C | 81 | 75.3 | 4.0 | 7.00 | 0.40 |
| ASMC_014 | 3-3 = | D0 | 64 | 68.8 | 2.0 | 6.00 | 0.53 |
| ASMC_015 | 5-4 = | D1 | 53 | 71.7 | 3.0 | 6.15 | 0.55 |
| ASMC_016 | 10-7 = | M10 | 36 | 58.3 | 2.0 | 6.00 | 0.80 |
| ASMC_017 | 3-2 = | D1 | 28 | 64.3 | 2.0 | 6.35 | 0.44 |
| ASMC_018 | 8-4 = | D | 24 | 62.5 | 2.0 | 3.60 | 0.68 |
| ASMC_019 | 4-0 = | D0 | 19 | 57.9 | 3.0 | 6.00 | NA |
| ASMC_020 | 6-3 = | D | 17 | 47.1 | 2.0 | 3.00 | NA |
| ASMC_021 | 4-1 = | A1 | 13 | 76.9 | 2.0 | 3.00 | NA |
| ASMC_022 | 6-2 = | C | 13 | 53.8 | 1.0 | 2.70 | NA |
| ASMC_023 | 7-5 = | C | 12 | 8.3 | 3.0 | 3.00 | NA |
| ASMC_024 | 4-4 = | D0 | 9 | 33.3 | 2.0 | 2.90 | NA |
| ASMC_025 | 5-3 = | M5 | 10 | 20.0 | 3.5 | 4.85 | NA |
| ASMC_026 | 10-4 = | M10 | 10 | 50.0 | 1.0 | 3.80 | NA |
| ASMC_027 | 4-2 = | D | 10 | 40.0 | 1.0 | 1.85 | NA |
| ASMC_028 | 10-5 = | D | 8 | 0.0 | NA | NA | NA |
| ASMC_029 | 3-0 = | D0 | 4 | 25.0 | 4.0 | 4.00 | NA |
| ASMC_030 | 9-5 = | C | 4 | 75.0 | 1.0 | 1.90 | NA |
| Term 4 – Subtraction MC (MOY) (ASMC_MOY) | |||||||
| ASMC_001-copy | 5-1 = | A1 | 1034 | 83.8 | 4.0 | 13.00 | 0.30 |
| ASMC_002-copy | 3-2 = | D1 | 1020 | 83.6 | 5.0 | 15.00 | 0.28 |
| ASMC_003-copy | 6-4 = | C | 998 | 79.3 | 7.0 | 21.00 | 0.33 |
| ASMC_004-copy | 5-5 = | D0 | 990 | 80.2 | 3.0 | 9.00 | 0.37 |
| ASMC_005-copy | 5-2 = | M5 | 938 | 88.3 | 5.0 | 13.00 | 0.31 |
| ASMC_006-copy | 10-6 = | M10 | 847 | 82.9 | 5.0 | 14.00 | 0.28 |
| ASMC_007-copy | 4-3 = | D1 | 754 | 84.1 | 5.0 | 11.00 | 0.24 |
| ASMC_008-copy | 6-3 = | D | 638 | 84.0 | 4.0 | 10.00 | 0.33 |
| ASMC_009-copy | 2-0 = | D0 | 567 | 82.9 | 3.0 | 8.00 | 0.24 |
| ASMC_010-copy | 7-3 = | C | 431 | 80.3 | 5.0 | 11.00 | 0.31 |
| ASMC_011-copy | 2-1 = | A1 | 370 | 83.2 | 3.0 | 7.00 | 0.44 |
| ASMC_012-copy | 5-2 = | M5 | 291 | 81.8 | 3.0 | 7.00 | 0.57 |
| ASMC_013-copy | 8-6 = | C | 214 | 80.4 | 3.0 | 7.45 | 0.48 |
| ASMC_014-copy | 3-3 = | D0 | 176 | 83.0 | 2.0 | 4.00 | 0.60 |
| ASMC_015-copy | 5-4 = | D1 | 134 | 76.9 | 2.0 | 5.90 | 0.65 |
| ASMC_016-copy | 10-7 = | M10 | 110 | 75.5 | 2.0 | 5.00 | 0.66 |
| ASMC_017-copy | 3-2 = | D1 | 90 | 76.7 | 2.0 | 4.00 | 0.71 |
| ASMC_018-copy | 8-4 = | D | 73 | 71.2 | 2.0 | 4.00 | 0.49 |
| ASMC_019-copy | 4-0 = | D0 | 60 | 61.7 | 3.0 | 5.40 | 0.54 |
| ASMC_020-copy | 6-3 = | D | 46 | 58.7 | 2.0 | 3.00 | 0.80 |
| ASMC_021-copy | 4-1 = | A1 | 35 | 71.4 | 2.0 | 3.00 | 0.47 |
| ASMC_022-copy | 6-2 = | C | 29 | 41.4 | 2.0 | 3.45 | 0.74 |
| ASMC_023-copy | 7-5 = | C | 26 | 38.5 | 2.0 | 3.00 | 0.68 |
| ASMC_024-copy | 4-4 = | D0 | 21 | 52.4 | 2.0 | 5.00 | 0.39 |
| ASMC_025-copy | 5-3 = | M5 | 20 | 55.0 | 1.0 | 2.00 | 0.66 |
| ASMC_026-copy | 10-4 = | M10 | 16 | 68.8 | 1.0 | 1.50 | NA |
| ASMC_027-copy | 4-2 = | D | 18 | 38.9 | 2.0 | 8.30 | NA |
| ASMC_028-copy | 10-5 = | D | 13 | 15.4 | 1.0 | 1.00 | NA |
| ASMC_029-copy | 3-0 = | D0 | 11 | 27.3 | 1.0 | 1.00 | NA |
| ASMC_030-copy | 9-5 = | C | 11 | 72.7 | 1.0 | 2.30 | NA |
| Flag | Question group |
|---|---|
| A1 | Subtrahend Is 1 |
| C | Common |
| D | Double |
| D0 | Subtrahend Or Difference Is 0 |
| D1 | Difference Is 1 |
| M10 | Minuend Is Ten |
| M5 | Minuend Is Five |
| Question group | Avg items attempted | No. response | % Correct | Median RT | 95th RT |
|---|---|---|---|---|---|
| Term 1 – Subtraction drag and drop (ASDD_2025) | |||||
| Common | 1.1/6 | 2129 | 63.6 | 11 | 26.00 |
| Difference Is 1 | 1.3/4 | 2770 | 71.0 | 8 | 21.00 |
| Double | 1/5 | 395 | 73.2 | 5 | 9.00 |
| Minuend Is Five | 1.1/3 | 1378 | 76.9 | 7 | 16.00 |
| Minuend Is Ten | 1/3 | 873 | 72.4 | 8 | 16.00 |
| Subtrahend Is 1 | 1.1/3 | 2362 | 82.0 | 8 | 24.00 |
| Subtrahend Or Difference Is 0 | 1.2/6 | 2013 | 61.7 | 6 | 16.00 |
| Term 3 – Subtraction drag and drop (ASDD_2025) | |||||
| Common | 1.2/6 | 455 | 73.8 | 10 | 26.00 |
| Difference Is 1 | 1.3/4 | 566 | 80.6 | 7 | 18.00 |
| Double | 1/5 | 114 | 84.2 | 5 | 9.00 |
| Minuend Is Five | 1.1/3 | 326 | 85.0 | 6 | 17.00 |
| Minuend Is Ten | 1/3 | 212 | 84.9 | 7 | 16.05 |
| Subtrahend Is 1 | 1.1/3 | 459 | 83.4 | 7 | 21.90 |
| Subtrahend Or Difference Is 0 | 1.3/6 | 459 | 75.2 | 5 | 12.00 |
| Term 3 – Subtraction multiple choice 2025 new (ASDD_2025_NEW) | |||||
| Common | 1.4/6 | 1031 | 75.3 | 7 | 23.00 |
| Difference Is 1 | 1.7/4 | 1261 | 79.2 | 6 | 15.00 |
| Double | 1.2/5 | 400 | 78.8 | 4 | 10.00 |
| Minuend Is Five | 1.2/3 | 755 | 83.2 | 5 | 14.00 |
| Minuend Is Ten | 1.1/3 | 578 | 77.3 | 6 | 16.00 |
| Subtrahend Is 1 | 1.2/3 | 932 | 79.7 | 5 | 15.00 |
| Subtrahend Or Difference Is 0 | 1.5/6 | 1111 | 73.0 | 4 | 10.00 |
| Term 4 – Subtraction MC (MOY) (ASMC_MOY) | |||||
| Common | 1.7/6 | 1709 | 78.3 | 6 | 18.00 |
| Difference Is 1 | 1.9/4 | 1998 | 83.0 | 5 | 13.00 |
| Double | 1.2/5 | 788 | 79.2 | 4 | 10.00 |
| Minuend Is Five | 1.3/3 | 1249 | 86.2 | 4 | 12.00 |
| Minuend Is Ten | 1.1/3 | 973 | 81.8 | 5 | 14.00 |
| Subtrahend Is 1 | 1.4/3 | 1439 | 83.4 | 4 | 12.00 |
| Subtrahend Or Difference Is 0 | 1.8/6 | 1825 | 80.1 | 3 | 8.00 |
