Bowlby believed that babies are generally formed one attachment to their primary caregiver, and that this attachment was special, in some way different from later attachments and that only after this attachment was established could a child from multiple attachments. This is not supported by Schaffer and Emerson (1964). As we have reported, they found most babies did attach to one person first. However, they also found that a significant minority appeared able to form multiple attachments at the same time. It is also unclear whether there is something unique about the first attachment. Studies of attachment to mother and father tend to show attachment to the mother is more important in predicting later behaviour (e.g. Suess et al., 1992). However, this could simply mean that attachment to the primary attachment figure is stronger than other attachments, not necessarily that it is different in quality.