Through in-home ethnographic observations of three multilingual immigrant families’ shared book reading, we identified recurring literacy practices in the home in which mothers, older siblings, and younger children participated during the reading. We found that families engaged in context-sensitive and cooperative shared reading practices, wherein decoding tended to be the focus. This practice—which we call transcultural decoding—involved multidirectional language socialization practices and occurred across languages, and older family members contributed both expertise and restrictive conceptions of reading. This work suggests the importance of (a) acknowledging the major focus on decoding during shared reading in families, and reconceptualizing that work as complex and nuanced, particularly across languages and cultures, and (b) considering siblings as cultural and linguistic mediators in family literacy practices.

We used structural equation modeling in the Early Childhood Longitudinal Study—Kindergarten Cohort (N = 17,020) to explore the influence of having an older sibling on kindergarten‐age focal children's cognitive self‐regulation. In model 1, we tested how having a sibling who is generally older than the focal child contributes to the focal child's working memory (WM) and cognitive flexibility (CF) upon entering kindergarten. In model 2, we assessed the contribution to the focal child's kindergarten WM and CF of having an older sibling in a non‐proximal age range (age 12–18) or not having siblings relative to having an older sibling in a proximal age range to the focal child (up to age 11). In model 3, we considered the contribution of having an older sister, an older brother, or both an older sister and an older brother of any age. Having an older sibling in general was associated with increased kindergarten WM, whereas having an older sister was related to increased WM and CF. Compared to having a proximal older sibling, having no siblings and having a non‐proximal older sibling were related to decreased WM and CF. Findings have implications for involving siblings in family interventions in early childhood.

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In order to identify culturally adaptive approaches to socialization of school readiness skills involving siblings in Latinx families, researchers investigated how Latinx older siblings interact with younger siblings in the context of shared reading to support social emotional skills in three Latinx immigrant families. Analyses revealed that older siblings demonstrated socialization practices such as using commands or questions and using social cues, which appeared to foster focal children's engagement. Older siblings also modeled connecting to prior knowledge, problem solving, negotiation of roles, and asking for and providing help, which seemed to enable children's autonomous social participation. Importantly, practices co-occurred with warm and responsive interaction styles. Findings inform how Latinx immigrant families socialize emotional skills to accomplish early literacy tasks using practices that may be culturally specific and aligned with parental socialization.