Table 7 Categories in task-2 (SOC)
Number of subjects using category labels (N 1 = 8) | Average size of category (N 2 = 15) | Number of problems accounted for (N = N 1 × N 2 = 120) | Number of problems wrongly accounted for (N* = 120) | Number of problems correctly accounted for (N C = N − N*) | |
|---|---|---|---|---|---|
Balance of forces | 7 | 4.4 | 31 | 5 | 26 |
Second law | 7 | 3.6 | 25 | 1 | 24 |
Conservation of energy | 8 | 4.1 | 33 | 12 | 21 |
Linear accelerated motion | 3 | 3.3 | 10 | 2 | 8 |
Conservation of momentum | 3 | 1.3 | 4 | 1 | 3 |
Acceleration | 1 | 3 | 3 | 0 | 3 |
Springs | 1 | 3 | 3 | 0 | 3 |
Pulleys | 1 | 3 | 3 | 0 | 3 |
Simple harmonic motion and period | 2 | 1 | 2 | 0 | 2 |
String and tension | 1 | 2 | 2 | 0 | 1 |
Time | 1 | 2 | 2 | 0 | 2 |
Friction | 1 | 1 | 1 | 0 | 1 |
Pendulum | 1 | 1 | 1 | 0 | 1 |
Collision | 2 | 1 | 1 | 0 | 1 |