The Match Quantity probe is a timed screening of studentsβ ability to match quantity representations to numbers.
In 2025 there are two main forms used in the Foundation screening:
Both forms use the same interaction style at BOY (Term 1) and MOY (Term 3).
This report excludes ABR alternate forms (is_abr == TRUE).
| Term | Test name | Test ID | Students | Median items attempted | Median accuracy (%)* | Median correct / min |
|---|---|---|---|---|---|---|
| 1 | Match Quantity 1-10 | MQ1-10_2025 | 1289 | 14/30 | 95.7 | 7.09 |
| 1 | Match Quantity 1-20 | MQ1-20_2025 | 1201 | 7/30 | 77.8 | 3.13 |
| 3 | Match Quantity 1-10 | MQ1-10_2025 | 783 | 8/30 | 100.0 | 8.42 |
| 3 | Match Quantity 1-20 | MQ1-20_2025 | 654 | 5/30 | 100.0 | 4.62 |
| * Accuracy is calculated after removing non-attempted items. |
Warning: Removed 196 rows containing non-finite outside the scale range
(`stat_boxplot()`).
| Term | Students | 25th percentile | Median | 75th percentile |
|---|---|---|---|---|
| Term 1 | 1289 | 5.24 | 7.09 | 8.73 |
| Term 3 | 783 | 6.48 | 8.42 | 10.59 |
| Term | Group | Students | 25th percentile | Median | 75th percentile |
|---|---|---|---|---|---|
| Term 1 | Bottom 25% | 325 | 3.36 | 4.14 | 4.72 |
| Term 1 | Rest | 964 | 6.73 | 7.89 | 9.36 |
| Term 3 | Bottom 25% | 196 | 4.07 | 5.11 | 5.77 |
| Term 3 | Rest | 587 | 7.96 | 9.60 | 11.32 |
| Term | Students | 25th percentile | Median | 75th percentile |
|---|---|---|---|---|
| Term 1 | 1201 | 2.07 | 3.13 | 4.57 |
| Term 3 | 654 | 3.46 | 4.62 | 5.88 |
| Term | Group | Students | 25th percentile | Median | 75th percentile |
|---|---|---|---|---|---|
| Term 1 | Bottom 25% | 304 | 1.05 | 1.53 | 1.73 |
| Term 1 | Rest | 897 | 2.79 | 3.75 | 5.05 |
| Term 3 | Bottom 25% | 172 | 2.07 | 3.00 | 3.25 |
| Term 3 | Rest | 482 | 4.36 | 5.26 | 6.37 |
Click on any plot to view an enlarged version in a lightbox popup.
| Question | Target (btn) | No. response | % Correct | Most common error | Median RT | 95th RT | Item discrim. |
|---|---|---|---|---|---|---|---|
| Term 1 | |||||||
| 1 | 4 (btn-3) | 1269 | 97.2 | 6 (btn-4) | 8.0 | 23.00 | 0.20 |
| 2 | 6 (btn-2) | 1222 | 90.7 | 8 (btn-3) | 9.0 | 22.00 | 0.22 |
| 3 | 2 (btn-4) | 1240 | 98.1 | 1 (btn-2) | 4.0 | 10.00 | 0.13 |
| 4 | 7 (btn-3) | 1235 | 82.7 | 8 (btn-1) | 8.0 | 19.00 | 0.15 |
| 5 | 9 (btn-4) | 1207 | 78.8 | 10 (btn-2) | 10.0 | 27.00 | 0.07 |
| 6 | 1 (btn-1) | 1208 | 98.9 | 3 (btn-3) | 4.0 | 10.00 | 0.07 |
| 7 | 6 (btn-3) | 1185 | 89.7 | 7 (btn-4) | 7.0 | 18.00 | 0.14 |
| 8 | 10 (btn-4) | 1117 | 85.1 | 9 (btn-2) | 10.0 | 24.00 | 0.18 |
| 9 | 2 (btn-1) | 1092 | 98.4 | 5 (btn-3) | 4.0 | 10.00 | 0.20 |
| 10 | 5 (btn-3) | 1034 | 89.3 | 6 (btn-2) | 6.0 | 14.00 | 0.17 |
| 11 | 7 (btn-1) | 933 | 84.8 | 8 (btn-2) | 8.0 | 18.00 | 0.13 |
| 12 | 3 (btn-2) | 888 | 97.2 | 5 (btn-3) | 4.0 | 9.00 | 0.20 |
| 13 | 4 (btn-2) | 833 | 95.2 | 5 (btn-3) | 5.0 | 10.00 | 0.07 |
| 14 | 8 (btn-4) | 687 | 83.0 | 10 (btn-1) | 8.0 | 16.00 | 0.16 |
| 15 | 5 (btn-1) | 564 | 83.3 | 6 (btn-3) | 6.0 | 11.00 | 0.14 |
| 16 | 10 (btn-3) | 441 | 88.0 | 9 (btn-1) | 7.0 | 14.00 | 0.24 |
| 17 | 3 (btn-2) | 395 | 95.2 | 1 (btn-3) | 3.0 | 6.00 | 0.45 |
| 18 | 7 (btn-4) | 303 | 70.3 | 6 (btn-3) | 6.0 | 14.00 | 0.37 |
| 19 | 1 (btn-1) | 256 | 96.9 | 7 (btn-3) | 3.0 | 6.00 | 0.37 |
| 20 | 6 (btn-4) | 185 | 79.5 | 4 (btn-3) | 5.0 | 9.00 | 0.32 |
| 21 | 9 (btn-1) | 154 | 87.0 | 7 (btn-3) | 4.0 | 7.35 | 0.53 |
| 22 | 5 (btn-2) | 103 | 78.6 | 8 (btn-1) | 4.0 | 9.00 | 0.49 |
| 23 | 10 (btn-4) | 72 | 83.3 | 6 (btn-1) | 4.0 | 8.05 | 0.41 |
| 24 | 2 (btn-1) | 57 | 82.5 | 3 (btn-2) | 3.0 | 6.00 | 0.47 |
| 25 | 6 (btn-2) | 40 | 77.5 | 4 (btn-3) | 4.0 | 5.50 | 0.58 |
| 26 | 1 (btn-4) | 36 | 86.1 | 4 (btn-1) | 3.0 | 5.50 | 0.42 |
| 27 | 7 (btn-3) | 24 | 45.8 | 10 (btn-1) | 4.0 | 5.00 | 0.25 |
| 28 | 4 (btn-1) | 18 | 44.4 | 2 (btn-3) | 4.0 | 5.65 | NA |
| 29 | 8 (btn-2) | 14 | 57.1 | 7 (btn-3) | 2.0 | 5.30 | NA |
| 30 | 3 (btn-3) | 10 | 80.0 | 1 (btn-2) | 2.5 | 4.30 | NA |
| Term 3 | |||||||
| 1 | 4 (btn-3) | 770 | 98.2 | 3 (btn-1) | 7.0 | 21.00 | 0.04 |
| 2 | 6 (btn-2) | 760 | 94.9 | 8 (btn-3) | 7.0 | 19.00 | 0.10 |
| 3 | 2 (btn-4) | 754 | 98.9 | 4 (btn-3) | 4.0 | 9.00 | 0.13 |
| 4 | 7 (btn-3) | 729 | 86.1 | 8 (btn-1) | 7.0 | 14.00 | 0.10 |
| 5 | 9 (btn-4) | 680 | 81.8 | 10 (btn-2) | 9.0 | 19.00 | -0.06 |
| 6 | 1 (btn-1) | 647 | 99.2 | 2 (btn-2) | 3.0 | 7.00 | 0.09 |
| 7 | 6 (btn-3) | 552 | 94.4 | 7 (btn-4) | 6.0 | 11.00 | 0.08 |
| 8 | 10 (btn-4) | 414 | 88.9 | 9 (btn-2) | 7.0 | 12.65 | 0.10 |
| 9 | 2 (btn-1) | 343 | 98.5 | 5 (btn-3) | 3.0 | 6.00 | 0.20 |
| 10 | 5 (btn-3) | 231 | 90.5 | 6 (btn-2) | 4.0 | 7.00 | 0.25 |
| 11 | 7 (btn-1) | 137 | 73.0 | 8 (btn-2) | 5.0 | 8.05 | 0.23 |
| 12 | 3 (btn-2) | 90 | 94.4 | 5 (btn-3) | 2.0 | 5.00 | 0.40 |
| 13 | 4 (btn-2) | 56 | 85.7 | 5 (btn-3) | 3.0 | 4.65 | 0.22 |
| 14 | 8 (btn-4) | 29 | 69.0 | 10 (btn-1) | 4.0 | 7.00 | 0.04 |
| 15 | 5 (btn-1) | 15 | 53.3 | 6 (btn-3) | 3.0 | 5.95 | NA |
| 16 | 10 (btn-3) | 10 | 70.0 | 2 (btn-2) | 2.0 | 7.80 | NA |
| 17 | 3 (btn-2) | 8 | 75.0 | 7 (btn-1) | 2.0 | 2.75 | NA |
| 18 | 7 (btn-4) | 4 | 50.0 | 9 (btn-2) | 2.5 | 2.95 | NA |
| 19 | 1 (btn-1) | 1 | 100.0 | β | 2.0 | 2.00 | NA |
| 20 | 6 (btn-4) | 1 | 100.0 | β | 6.0 | 6.00 | NA |
| 21 | 9 (btn-1) | 1 | 100.0 | β | 3.0 | 3.00 | NA |
| 22 | 5 (btn-2) | 1 | 0.0 | 2 (btn-3) | NA | NA | NA |
| 23 | 10 (btn-4) | 1 | 0.0 | 4 (btn-3) | NA | NA | NA |
| Question | Target (btn) | No. response | % Correct | Most common error | Median RT | 95th RT | Item discrim. |
|---|---|---|---|---|---|---|---|
| Term 1 | |||||||
| 1 | 5 (btn-1) | 1182 | 88.4 | 6 (btn-3) | 10.0 | 24.80 | 0.03 |
| 2 | 14 (btn-4) | 1127 | 70.2 | 13 (btn-3) | 16.0 | 45.00 | 0.05 |
| 3 | 9 (btn-1) | 1108 | 70.8 | 10 (btn-4) | 12.0 | 27.00 | 0.08 |
| 4 | 17 (btn-4) | 1062 | 61.9 | 20 (btn-3) | 18.0 | 44.00 | 0.04 |
| 5 | 11 (btn-2) | 939 | 66.3 | 13 (btn-4) | 13.0 | 27.00 | 0.11 |
| 6 | 16 (btn-3) | 775 | 66.1 | 19 (btn-4) | 15.0 | 30.00 | 0.15 |
| 7 | 12 (btn-1) | 650 | 60.2 | 13 (btn-4) | 12.0 | 22.00 | 0.13 |
| 8 | 1 (btn-4) | 617 | 98.2 | 3 (btn-2) | 4.0 | 9.00 | 0.00 |
| 9 | 6 (btn-2) | 500 | 72.0 | 7 (btn-3) | 7.0 | 14.00 | 0.06 |
| 10 | 19 (btn-3) | 324 | 56.5 | 20 (btn-1) | 11.0 | 22.00 | 0.23 |
| 11 | 15 (btn-2) | 236 | 49.2 | 17 (btn-4) | 5.5 | 14.00 | 0.29 |
| 12 | 3 (btn-1) | 220 | 90.9 | 6 (btn-3) | 4.0 | 9.00 | 0.10 |
| 13 | 20 (btn-3) | 183 | 68.9 | 17 (btn-2) | 3.0 | 9.75 | 0.29 |
| 14 | 7 (btn-3) | 152 | 61.2 | 10 (btn-1) | 4.0 | 9.80 | 0.30 |
| 15 | 4 (btn-1) | 149 | 69.1 | 5 (btn-2) | 4.0 | 9.00 | 0.24 |
| 16 | 18 (btn-3) | 126 | 42.9 | 20 (btn-2) | 4.0 | 15.00 | 0.38 |
| 17 | 2 (btn-3) | 120 | 90.0 | 4 (btn-4) | 3.0 | 6.65 | 0.18 |
| 18 | 13 (btn-3) | 105 | 43.8 | 16 (btn-2) | 3.0 | 9.50 | 0.22 |
| 19 | 10 (btn-2) | 95 | 56.8 | 11 (btn-4) | 3.0 | 9.00 | 0.38 |
| 20 | 9 (btn-4) | 86 | 29.1 | 10 (btn-3) | 4.0 | 10.80 | 0.43 |
| 21 | 12 (btn-2) | 79 | 40.5 | 13 (btn-3) | 3.0 | 8.00 | 0.26 |
| 22 | 8 (btn-4) | 70 | 34.3 | 10 (btn-2) | 3.0 | 7.55 | 0.24 |
| 23 | 11 (btn-3) | 63 | 46.0 | 15 (btn-2) | 2.0 | 7.40 | 0.30 |
| 24 | 20 (btn-2) | 55 | 54.5 | 13 (btn-3) | 2.0 | 12.85 | 0.33 |
| 25 | 1 (btn-4) | 51 | 90.2 | 4 (btn-2) | 2.0 | 6.00 | 0.12 |
| 26 | 7 (btn-2) | 52 | 38.5 | 8 (btn-3) | 2.0 | 6.05 | 0.40 |
| 27 | 5 (btn-1) | 46 | 47.8 | 3 (btn-2) | 2.5 | 7.00 | 0.27 |
| 28 | 14 (btn-1) | 41 | 17.1 | 18 (btn-3) | 2.0 | 4.70 | 0.05 |
| 29 | 17 (btn-4) | 37 | 18.9 | 15 (btn-3) | 2.0 | 7.40 | 0.06 |
| 30 | 8 (btn-4) | 31 | 25.8 | 9 (btn-3) | 3.0 | 7.60 | 0.17 |
| Term 3 | |||||||
| 1 | 5 (btn-1) | 649 | 92.1 | 6 (btn-3) | 7.0 | 18.00 | 0.03 |
| 2 | 14 (btn-4) | 633 | 80.7 | 18 (btn-2) | 12.0 | 31.00 | -0.08 |
| 3 | 9 (btn-1) | 608 | 80.3 | 10 (btn-4) | 9.0 | 20.00 | 0.03 |
| 4 | 17 (btn-4) | 474 | 71.1 | 20 (btn-3) | 13.0 | 24.00 | 0.15 |
| 5 | 11 (btn-2) | 346 | 78.0 | 13 (btn-4) | 9.0 | 15.00 | 0.19 |
| 6 | 16 (btn-3) | 173 | 64.2 | 19 (btn-4) | 8.0 | 14.00 | 0.27 |
| 7 | 12 (btn-1) | 118 | 47.5 | 14 (btn-2) | 6.5 | 10.75 | 0.33 |
| 8 | 1 (btn-4) | 98 | 96.9 | 4 (btn-1) | 3.0 | 6.00 | 0.12 |
| 9 | 6 (btn-2) | 71 | 66.2 | 7 (btn-3) | 4.0 | 7.70 | 0.21 |
| 10 | 19 (btn-3) | 48 | 56.2 | 20 (btn-1) | 4.0 | 6.70 | 0.34 |
| 11 | 15 (btn-2) | 34 | 29.4 | 11 (btn-3) | 3.0 | 7.00 | 0.09 |
| 12 | 3 (btn-1) | 28 | 85.7 | 6 (btn-3) | 3.0 | 5.85 | 0.16 |
| 13 | 20 (btn-3) | 18 | 61.1 | 17 (btn-2) | 3.0 | 6.00 | NA |
| 14 | 7 (btn-3) | 14 | 64.3 | 5 (btn-2) | 2.0 | 4.20 | NA |
| 15 | 4 (btn-1) | 9 | 66.7 | 5 (btn-2) | 3.0 | 7.75 | NA |
| 16 | 18 (btn-3) | 6 | 33.3 | 20 (btn-2) | 4.0 | 5.80 | NA |
| 17 | 2 (btn-3) | 3 | 100.0 | β | 2.0 | 5.60 | NA |
| 18 | 13 (btn-3) | 1 | 0.0 | 16 (btn-2) | NA | NA | NA |
| 19 | 10 (btn-2) | 3 | 33.3 | 7 (btn-3) | 2.0 | 2.00 | NA |
| 20 | 9 (btn-4) | 2 | 0.0 | 12 (btn-1) | NA | NA | NA |
| 21 | 12 (btn-2) | 1 | 100.0 | β | 2.0 | 2.00 | NA |
| 22 | 8 (btn-4) | 1 | 100.0 | β | 2.0 | 2.00 | NA |
| 23 | 11 (btn-3) | 1 | 100.0 | β | 2.0 | 2.00 | NA |
| 24 | 20 (btn-2) | 1 | 100.0 | β | 2.0 | 2.00 | NA |
This section shows how item difficulty varies with the target number (Stimuli).
The size of each dot represents the number of attempted responses for that item. The regression line is weighted to give more influence to items with higher response counts.
Within each tab, Term 1 and Term 3 are shown separately.
`geom_smooth()` using formula = 'y ~ x'
`geom_smooth()` using formula = 'y ~ x'Warning: Removed 4 rows containing missing values or values outside the scale range
(`geom_smooth()`).
`geom_smooth()` using formula = 'y ~ x'
`geom_smooth()` using formula = 'y ~ x'