Table 1 Descriptive statistics and correlations (student-level).

1

1

2

0.821^**

1

3

−0.181^**

−0.155^**

1

4

0.070^**

0.102^**

−0.059^**

1

5

0.178^**

0.138^**

−0.195^**

0.074^**

1

6

−0.013

0.038^*

−0.166^**

0.150^**

0.035^*

1

7

0.137^**

0.082^**

0.110^**

−0.239^**

0.032^*

−0.182^**

1

8

0.130^**

0.101^**

−0.108^**

−0.027

0.216^**

−0.049^**

−0.015

1

9

0.102^**

0.080^**

−0.081^**

−0.021

0.190^**

−0.034^*

−0.009

0.582^**

1

10

0.051^**

0.043^**

0.000

0.002

0.096^**

−0.025

−0.007

0.323^**

0.291^**

1

N

4683

4628

4621

4590

4630

4590

4676

4216

4218

4204

Mean

3.874

3.882

8.652

2.610

3.400

3.750

0.503

4.558

4.382

6.452

S.D.

0.486

0.573

3.025

2.368

2.389

1.450

0.500

1.280

1.159

0.931

Skewness

−0.180

−0.207

0.045

2.146

0.252

0.501

−0.010

−0.549

−0.413

−0.821

Kurtosis

−0.147

−0.262

−0.252

4.363

−1.212

0.867

−2.001

0.319

0.286

9.413