Table II.

Mean scores and correlations between study variables.

		Mean (SD)	Range	t-value	P-value	Cohen’s d	1	2	3	4	5	6	7
1. Satisfaction with life	Total	21.56 (7.02)	5–35					.66**	−.52**	−.23**	.06*	.27**	−.10**
	Boys	22.89 (6.91)	5–35	−7.26	.000	.36
	Girls	20.41 (6.90)	5–35
2. Self-esteem	Total	28.16 (6.40)	10–40						−.55**	−.29**	.08**	.20**	−.01
	Boys	30.29 (6.18)	10–40	−13.13	.000	.65
	Girls	26.32 (6.00)	10–40
3. Loneliness	Total	2.77 (1.07)	1–5							.28**	−.01	−.22**	.06*
	Boys	2.20 (1.07)	1–5	10.95	.000	.53
	Girls	2.77 (1.07)	1–5
4. Bullying	Total	4.31 (1.77)	3–15								.03	−.13**	−.05*
	Boys	4.36 (1.93)	3–15	−.987	.324	.05
	Girls	4.27 (1.61)	3−15
5. Parents’ education	Total	5.94 (1.68)	2−10									.30**	−.08**
	Boys	5.94 (1.68)	2–10	.18	.857	.01
	Girls	5.95 (1.69)	2–10
6. Family economy	Total	4.01 (.98)	1–5										−.08**
	Boys	4.07 (.92)	1–5	−2.23	.026	.11
	Girls	3.96 (1.03)	1–5
7. Age	Total	17.02 (1.04)	15–21	.509	.610	0
	Boys	17.00 (1.14)	15–21
	Girls	17.03 (1.07)	15–21

Cohen’s d-effect sizes: small (0.20), medium (0.50) and large (>0.80).

^*p ⩽ .05; ^**p ⩽ .01.