Table 1. Correct answers in pre-tests and post-tests.

Group	Pre-test	Post-test	Improvement	Learning efficiency
1a (eBook), Simple	27.4% (25.4–29.4%)	92.9% (90.6–95.2%)	65.5% (63.0–67.9%)	0.89 (0.85–0.94)
1b (eCase), Simple	26.7% (24.7–28.6%)	94.3% (92.2–96.4%)	67.6% (64.7–70.5%)	0.88 (0.85–0.92)
2 (Case), Simple	27.6% (25.9–29.4%)	93.3% (91.4–95.3%)	65.7% (63.0–68.4%)	0.88 (0.84–0.92)
1a (eBook), Complex	33.7% (32.5–34.9%)	82.1% (77.9–86.3%)	48.4% (44.1–52.8%)	0.92 (0.76–1.1)
1b (eCase), Complex	33.3% (32.1–34.5%)	92.7% (91.2–94.2%)	59.4% (57.6–61.1%)	0.51 (0.45–0.56)
2 (Classroom), Complex	33.0% (31.6–34.4%)	91.9% (90.3–93.5%)	58.9% (56.8–61.0%)	0.59 (0.57–0.61)

Values are relative numbers of correct answers for each type of educational content in each group, with 95% confidence intervals in brackets. Learning efficiency is improvement in correct questions per minute of study. N = 21 in each group.