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Psychologists are interested in understanding how early social environments impact children’s behavior and cognition. Early social environments are comprised of social relationships; however, there have been relatively few tools available to quantify the depth and breadth of children’s social relationships. We harnessed the power of social networks to demonstrate that networks can be used to describe children’s early social environments. Descriptive data from American children aged 6 months–5 years (n = 280; 47% female, 56% White) demonstrates that network properties can be used to provide a quantitative analysis of children’s early social environments and highlights how these environments vary across development. Social network methodology will provide researchers with a comprehensive picture of children’s early social experiences and improve studies exploring individual differences.

Understanding others' perspectives and integrating this knowledge in social interactions is challenging for young children; even adults struggle with this skill. While young children show the capacity to understand what others can and cannot see under supportive laboratory conditions, more research is necessary to understand how children implement their perspective-taking (PT) skill during interactions and which socio-cognitive skills support their ability to do so. This preregistered study examined children's Level 1 visual PT in a real-time social interaction and tested whether social-cognitive skills (focusing on inhibition of imitation) predicted PT. Thirty-six 3-year-old children (mean age: 37.3 months) participated in a PT task and responded implicitly (via eye gaze) and explicitly (via toy choice) to situations where their communicative partner could see some objects but not others. Three-year-olds demonstrated sensitivity to another's perspective via implicit responses, but did not consistently take their partner's perspective into account in their actions when considering objects their partner could not see. Contrary to adult findings, children who struggled to inhibit imitating (those more affected by another's actions) demonstrated better PT, again when considering objects outside their partner's sight. Thus, 3-year-olds' sensitivity to others' perspectives was robust, while acting on PT knowledge may still be developing; further, children more affected by another's actions demonstrated improved PT skills.

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