Table 1.
Gender ratio, prior GPA, number of other science courses taken, attendance, and withdrawals
| Four individual sections |
Combined treatment and control sections |
||||||
|---|---|---|---|---|---|---|---|
| Instructor 1 |
Instructor 2 |
Combined |
|||||
| Treatment | Control | Treatment | Control | Treatment | Control | Differencea | |
| Gender (% female) | 71.8 | 53.7 | 58 | 69 | 64.7 | 57.8 | |
| GPAb | 4.26 (0.05) | 3.80 (0.06) | 4.27 (0.05) | 4.20 (0.05) | 4.26 (0.04) | 4.02 (0.04) | P < 0.001 |
| Other science | 0.88 (0.06) | 1.11 (0.07) | 1.01 (0.06) | 1.03 (0.06) | 0.94 (0.04) | 1.07 (0.04) | P = 0.055 |
| Pretest (out of 15 pts) | 4.83 (0.13) | 4.85 (0.17) | 5.02 (0.13) | 4.55 (0.19) | 4.94 (0.13) | 4.66 (0.10) | P = 0.149 |
| Attendance (%) | 70.2 (3.04) | 46.0 (3.04) | 69.6 (1.81) | 59.1 (1.75) | 69.9 (1.74) | 52.6 (1.74) | P < 0.001 |
| Withdrawals (%) | 3.4 | 11.9 | 5.0 | 4.0 | 4.2 | 7.7 | |
Values are means with the SEMs in parentheses.
a P values are for the difference between combined Treatment and Control sections.
b GPA was divided into 5 categories: 1 = 0–1.6; 2 = 1.7–2.2; 3 = 2.3–2.8; 4 = 2.9–3.4; and 5 = 3.5–4.0.