User:ShermikaB/sandbox

According to the University of Pittsburgh based on the child, signs of stranger anxiety can differ from one to the other.

Signs of stranger anxiety
 * 1) In the presence of a stranger, some infant can abruptly go quiet and look at the stranger with fear.
 * 2) Certain emotions will increase in other children while in the presence of a stranger such as loud crying and fussiness.
 * 3) And others will have the tendency to bury themselves in their caregiver's arms or even place themselves away from the stranger by placing caregiver between themselves and the stranger.

Onset

Fearfulness within the sight of outsiders is thought to develop around 6 months of age. In fact, that fear of strangers increases throughout their first year of life. The beginning of stranger fear is accepted to be adaptive, offering parity to infant’s tendencies toward approach and exploration and adding to the developing attachment system. However, in extreme cases of stranger fear, this can be warning sign to the emergence of social anxiety.

Brooker, R. J., Buss, K. A., Lemery-Chalfant, K., Aksan, N., Davidson, R. J., & Goldsmith, H. H. (2013). The Development of Stranger Fear in Infancy and Toddlerhood: Normative Development, Individual Differences, Antecedents, and Outcomes. Developmental Science, 16(6), 864–878. http://doi.org/10.1111/desc.12058