This behavior was explained by Mary Ainsworth, a psychologist, using attachment theory. A strong, lasting link between two people is what is meant when we talk about attachment.
In order to evaluate the security of attachment in infants and young attachment children, Ainsworth and her colleagues conducted an experiment. This study looked at children's relationships with their primary caregivers, psychologist separation anxiety, and anxiety about strangers.
When a child is separated from the main caregiver, they go through a stage called separation anxiety where they feel anxious, such as fretfulness and wariness. When babies are beginning to build psychologist attachments, usually about 8 months old, and peaks between 14 and 18 months old, separation anxiety first manifests. When attachment youngsters feel secure in their home setting, anxiety of this kind gradually decreases in frequency and intensity.
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