Changing the conception of magnetic fields around circular electric wire. (N=46)
| Analysis criteria | Details analysis criteria | Number of students (%) | Increase/Decrease(%p) | ||
|---|---|---|---|---|---|
| Pre | Post | ||||
| Direction(N→S) | Scientific | Direction (N→S) | 14(30.4) | 19(41.3) | +5(+10.9) |
| Non-scientific | No arrow | 10(21.7) | 8(37.8) | -2(-4.3) | |
| Opposite direction | 6(13.0) | 5(10.9) | -1(-2.1) | ||
| No answer | 16(34.8) | 14(30.4) | -2(-4.3) | ||
| Subtotal | 46(100.0) | 46(100.0) | |||
| Shape (Independent closed curve) | Scientific | Circular closed curve | 21(45.7) | 28(60.9) | +7(15.2) |
| Non-scientific | Opened curve or spiral | 9(19.6) | 4(8.7) | -5(10.9) | |
| No answer | 16(34.8) | 14(30.4) | -2(-4.3) | ||
| Subtotal | 46(100.0) | 46(100.0) | |||
| Number of magnetic field lines | Scientific | Two or more circles | 18(39.1) | 26(56.5) | +8(+17.4) |
| Non-scientific | Single circle | 12(26.1) | 6(13.0) | -6(-13.1) | |
| No answer | 16(34.8) | 14(30.4) | -2(-4.3) | ||
| Subtotal | 46(100.0) | 46(100.0) |