**3. Results**

#### *3.1. Single Effect of Breastfeeding or Active Bonding*

Of the 1267 participants with completed data, 77% exclusively breastfed their babies and 43.4% always talk to their babies while feeding. Mean (SD) scores, effect sizes (Cohen's *d*) and results of specific *t* test comparisons for the two pairs of comparison groups are given in Table 1. The children who were exclusively breastfed had significantly lower mean scores for somatic complaints and total internalizing problems. Active bonded children had significant lower scores across emotionally reactive, anxious/depressed, withdrawn syndromes and total internalizing problems.
