The children who participated at all three test - sessions (N = 75) did not
differ from those who did not (N = 45) on income level or family
type, nor were there differences in
distribution of attachment between the two groups (3 - way attachment to mother χ (2) 2 = 2.54, ns; 3 - way attachment to father χ (2) 2 = 1.22, ns).