Stranger anxiety develops soon after

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Stranger anxiety typically develops around 8-9 months of age, which is when infants begin to understand the concept of object permanence (that objects continue to exist even when they are out of sight). This realization can make infants more wary of unfamiliar people, as they may feel that the person could disappear and reappear unexpectedly. In contrast, conservation (understanding that the amount or quantity of something does not change just because its appearance or arrangement is altered) and egocentrism (difficulty understanding that others can have different perspectives or viewpoints) develop earlier, around ages 5-6 and 2-3, respectively, and do not directly influence stranger anxiety. Theory of mind, or the ability to understand that others have thoughts, feelings, and intentions that may differ from one's own, is also important for social development but typically emerges around age 4 and is not directly relevant to stranger anxiety.

Stranger Anxiety Develops Soon After