In his book called, “A Short Introduction to Attachment and Attachment Disorder”, Pearce defined attachment as a “term used to describe the dependency relationship a child develops towards his or her primary caregivers”.
He also included the following Attachment behavior that is formed during the early years:
Eye-to-eye gaze
Reaching
Smiling
Signalling or calling to
Holding,
Clinging or protesting separation
Seeking to be picked up
Pouting
Searching
Verbal Engagement/ Need Expression