Diane N. Ruble’s research while affiliated with New York University and other places

Exposure to diverse peers can expand children's experiences and skillsets, and these positive effects linger beyond childhood. Yet, little is known about the ethnic/racial, gender, and age diversity in children's peer groups and how it may shift over time. Even less is known about these patterns among US nonwhite children. In the present study, we thus explored how diversity (with regard to ethnicity/race, gender, and age) in ethnically minoritized children's peer groups change from infancy through early childhood and tested whether the diversity of early peer groups remained stable across time. Over a 6‐year period we followed 234 children (ages 1–6; 115 girls) from three large ethnic/racial minority groups in the United States: African American, Dominican American, and Mexican American. With age, children's peer groups increased in ethnic/racial diversity but decreased in gender and age diversity. Moreover, children's early peer diversity (at/around age 2–4) positively predicted the diversity of their later peer groups (at/around age 6) across all three types of diversity. This study provides novel insights into how children's peer groups change and grow in early development, particularly focusing on children from backgrounds that have been historically underrepresented in psychological science.

Most U.S. children grow up with siblings. Theory and prior work suggest that older siblings are important sources of gender-related information and socialization. However, few studies have investigated the patterns of these associations longitudinally across early childhood. The present study examines the influence of sibling presence and gender composition on the trajectory of early gender-typed behavior and appearance in children from age 2 through 6 in a diverse sample of Dominican American (36%), African American (33%), and Mexican American (31%) mother-child dyads (N = 232; 112 girls, 120 boys) from low-income households in New York City (M = $20,459, SD = 14,632). Results found that children without older siblings spent more time playing with counterstereotypical toys and their mothers' reports indicated similar behavior over the past month (e.g., a girl playing with toy vehicles and balls; a boy playing with toy kitchen sets and dolls) than children with older siblings. Further, children with at least one other-gender sibling (e.g., a girl with an older brother) played more frequently with counterstereotypical toys compared with children with only same-gender siblings (e.g., a girl with only older sisters). Results on the relation between siblings and gender appearance were mixed. Older siblings may thus influence early trajectories of important gender domains (e.g., toy play), which can have various long-term implications for developing skills and interests. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

Gender segregation is ubiquitous and may lead to increased bias against other-gender peers. In this study, we examined whether individual differences in friendships with other-gender children reduce gender bias, and whether these patterns vary by gender or ethnicity. Using a 1-year longitudinal design (N = 408 second graders [Mage = 7.56 years] and fourth graders [Mage = 9.48 years]), we found that, across groups, gaining more other-gender friendships over the year led to (a) increased positive cognitive-based attitudes toward the other gender and (b) increased positive and decreased negative affect when with the other gender. We also tested the reverse pattern and found support for a bidirectional link. Girls and Latinx children often showed more gender bias than did boys and European American children. Implications for promoting positive relationships between girls and boys are discussed.

Many U.S. children spend a significant amount of time in center-based care prior to entering preschool. Previous theory and research would suggest center-based care settings offer important opportunities for gender socialization as children here are surrounded by multiple sources of gender-typing information (e.g. peers, adults, toys and activities). The present longitudinal study examined whether center-based care enrollment status influences level and timing of children's gender-typed behaviors (same-gender friendships, play and appearance), and knowledge (self-categorization and stereotyping) between the ages of 2–5. Participants were children and their mothers of low-income, urban backgrounds (N = 232; African American, Mexican American, and Dominican American). Overall, children enrolled in center-based care at ages 2 and 3 showed higher gender-typing patterns than children enrolled later or not at all. Associations were strongest for same-gender-friendships and gender-typed play, domains that might affect children's subsequent engagement in and learning of certain tasks, skillsets, and activities.

Children's gender-stereotypical dress and appearance might be one of the first representations of children's emerging sense of gender identity. Gender self-socialization theories posit that as children become more aware of gender categories, they become motivated to adhere to gender stereotypes, such as by expressing interest in dressing in feminine or masculine ways. Socialization theories predict that children's gender-typed appearance reflects parents' choices. For example, gender-traditional parents might dress their children in gender-stereotypical ways. At the same time, dressing in gender-stereotypical ways might contribute to children's growing awareness of gender categories. The current study investigated the factors associated with gender-typed appearance among 175 (87 girls, 88 boys) Mexican American, Dominican American, and African American 2-year-olds. We examined both child and parent contributions to early gender-typed appearance. To measure children's early conceptual understanding of gender categories, we assessed children's use and recognition of gender verbal labels. To examine the influence of parent socialization, we assessed mothers' gender-role attitudes. Children's gender-typed appearance was observed and coded during an assessment. Surprisingly, mothers' gender-role attitudes were not significantly associated with toddlers' gender-typed appearance. However, toddlers' gender labeling was associated with their gender-typed appearance, suggesting that self-socialization processes can be found as early as 24 months of age.

Academic socialization by low-income immigrant mothers from Mainland China was investigated in two studies. Immigrant Chinese mothers of first graders (n = 52; Mage = 38.69) in the United States (Study 1) and kindergartners (n = 86; Mage = 36.81) in Hong Kong (Study 2) tell stories that emphasized achieving the best grade through effort more than did African American (n = 39; Mage = 31.44) and native Hong Kong (n = 76; Mage = 36.64) mothers, respectively. The emphasis on achievement was associated with mothers' heightened discussion on discrimination (Study 1) and beliefs that education promotes upward mobility (Study 2), as well as children's expectations that a story protagonist would receive maternal criticism for being nonpersistent in learning (Study 2).

This study examined factors that predicted children's gender intergroup attitudes at age 5 and the implications of these attitudes for intergroup behavior. Ethnically diverse children from low-income backgrounds (N = 246; Mexican-, Chinese-, Dominican-, and African American) were assessed at ages 4 and 5. On average, children reported positive same-gender and negative other-gender attitudes. Positive same-gender attitudes were associated with knowledge of gender stereotypes. In contrast, positive other-gender attitudes were associated with flexibility in gender cognitions (stereotype flexibility, gender consistency). Other-gender attitudes predicted gender-biased behavior. These patterns were observed in all ethnic groups. These findings suggest that early learning about gender categories shape young children's gender attitudes and that these gender attitudes already have consequences for children's intergroup behavior at age 5.

The goal was to test a new dual identity perspective on gender identity by asking children (n = 467) in three grades (Mage = 5.7, 7.6, 9.5) to consider the relation of the self to both boys and girls. This change shifted the conceptualization of gender identity from one to two dimensions, provided insights into the meaning and measurement of gender identity, and allowed for revisiting ideas about the roles of gender identity in adjustment. Using a graphical measure to allow assessment of identity in young children and cluster analyses to determine types of identity, it was found that individual and developmental differences in how similar children feel to both genders, and these variations matter for many important personal and social outcomes.