Attachment research has traditionally focused on individual differences in global
patterns of attachment to important others. The current research instead focuses primarily
on within-person variability in attachments across relational partners. It was predicted
that within-person variability would be substantial, even among primary attachment
figures of mother, father, romantic partner, and best friend. The prediction was supported
in three studies. Furthermore, in line with self-determination theory, multilevel
modeling and regression analyses showed that, at the relationship level, individuals'
experience of fulfillment of the basic needs for autonomy, competence, and relatedness
positively predicted overall attachment security, model of self, and model of other.
Relations of both attachment and need satisfaction to well-being were also explored.