How Insecure Attachment Impacts Development

There are different kinds of insecure attachments which include ambivalent attachment, avoidant attachment, and disorganized attachment.
Ambivalent attachment is when a child becomes upset when they get separated from his parent, which can mean the child doesn’t feel as if he or she can’t rely on the caregiver when the need arises.
Avoidant attachment stays away from his parents, those children to show avoidant attachment may have parents who are neglecting or abusing them. Disorganized attachment is when there isn’t a clear attachment between the child and the caregiver (Sincero, n.d.).

Reference:
Sincero. (n.d.). Bowlby Attachment Theory - Core emotional development in humans. Retrieved June 06, 2017, from https://explorable.com/bowlby-attachment-theory