Table 4 Descriptive statistics of the behavioral variables (n = 2454)

1. Number of completed quizzes

800.4

160.3

2–973

2. Total access time (h)

21.2

11.6

0.01–109.48

3. Reviewing time

2.8

4.3

0–60

4. Score of completed quizzes

65.6

12.1

0–98

5. Anti-procrastination

0.27

0.14

0.03–0.84

6. Irregularity of study interval (days)

16.6

8.3

0–90

7. Pacing

742.5

166.7

2–973

8. Mid course point

3.3

1.0

0–4

9. Final course point

3.2

1.1

0–4