Table 2.

Results of the multivariate model

	s	k	β	t	F(df1, df2)	σ2 level 3	σ2 level 2
Multivariate model	66	404			F(9,394) = 9.390***	0.018	0.006
Intercept			0.242	2.984**
Impact factor			0.009	0.725
Non-Western countries			0.077	3.910***
Longitudinal design			− 0.137	− 4.396***
Age at attachment measure			− 0.008	− 1.315
Female sample			0.113	3.668***
Insecure attachment			0.047	3.332***
Categorical measure attachment			0.005	0.126
Questionnaire attachment			0.197	3.902***
Child informant attachment			0.006	0.082

s number of independent studies, k number of effect sizes, F(df1, df2) omnibus test, σ²level 3 variance at the between-study level, σ²level 2 variance at the between effect size level

**p < .01; ***p < .001