The theoretical basis of the proposed study is drawn from an ecological-transactional (Lynch & Cicchetti, 1998) systems approach to development, which focuses on contexts, and correspondingly, overlays the gender affirmative model’s (GAM) transactional model of support (Keomeier & Ehrensaft, 2018) to reveal protection in the school ecology. Combining these two approaches provides unique insights into protective factors in the school ecology, distinct from developmental systems approaches driven by the minority stress model (Meyer, 2003), which are designed to highlight the multidimensional quality of risk (Eisenberg et al., 2019). The dissertation had two central aims: 1) to report on the development of the Gender Affirmative School Climate (GASC) scale, a self-report survey designed to capture high school climate specific to the domain of gender, and 2) to explore how gender affirmative school climate (GASC) relates to student self-esteem and school belongingness. Unique from risk factors approaches the central aims sought out to identify protective factors within a developmental system ecology of the high school context.In two pilot studies (N=12; N=758; trans = 413, non-trans = 344) and primary study (N=813; trans = 482, non-trans = 328) results for scale development provide evidence to validate assumptions that the proposed (GASC) construct captures what was intended, that is, school climate specific to the domain of gender. However, measurement invariance procedure showed that not all items operated equivalently across trans and non-trans groups, and confirmed that the proposed scale meets criteria for “weak measurement invariance”. High school students that reported more positive school climate reported lower self-esteem scores. Only one protective moderator was consistent with hypotheses: More feelings of similarity to peer group gender (boys) emerged as a protective factor for transgender identified high schoolers attenuating the negative relationship between perceptions of school climate and self-esteem. Latent measurement models for each gender group demonstrated that the school belongingness construct is highly related to the proposed (GASC) construct. This demonstrated domain overlap with “feelings of school belongingness” signals that the proposed scale showed good convergent validity. The results provide insight about ways high schools can be pro-active to promote a healthier school climate for transgender students.

Early childhood educators' beliefs and practices regarding race and gender were examined via two, mixed-methods studies. Study 1 assessed 341 early childhood educators' beliefs and classroom practices regarding race and gender via an online survey. Educators filled out a largely multiple-choice survey about topics such as colorblindness, sexism, and multicultural teaching practices. Study 2 involved a case study of two preschool teachers who were intentional about addressing racial and gender diversity via anti-bias education. Study 2 explored how early childhood teachers use anti-bias practices, how teachers discuss race and gender with young children, and teachers' experiences using anti-bias curricula. Study 2 involved semi-structured teacher interviews, naturalistic observations of teacher-child classroom interactions, audio-recorded book reading activities, and observations of the classroom environment (e.g., classroom toys, posters). Findings from both studies indicate that educators feel more comfortable and skilled at addressing gender than race in their classrooms. Findings also indicate that there are discrepancies between educators’ beliefs and classroom practices with regard to race, gender, and anti-bias practices. Implications for children's prejudice and stereotype development, as well as for teacher professional development, are addressed.

The overarching goal of this dissertation was to contribute to the field’s understanding of young children’s development of ethnic-racial identification. In particular, Study 1 presented the adaptation of three measures that are developmentally appropriate for assessing young children’s ethnic-racial attitudes, ethnic-racial centrality, and ethnic-racial knowledge, and tested the psychometric properties of each measure. Findings from Study 1 provided limited initial support for the construct validity and reliability of the measures; importantly, there were many differences in the descriptives and measurement properties based on the language in which children completed the measures. In addition to measurement of ethnic-racial identification, Study 2 used the measures developed in Study 1 and tested whether Mexican-origin mothers’ adaptive cultural characteristics (i.e., ERI affirmation, ethnic-racial centrality, and involvement in Mexican culture) when children were 3 years of age predicted greater cultural socialization efforts with children at 4 years of age and, in turn, children’s ethnic-racial identification (i.e., children’s ethnic-racial attitudes, ethnic-racial centrality, ethnic-racial knowledge, and identification as Mexican) at 5 years of age. Furthermore, children’s characteristics (i.e., gender and skin tone) were tested as moderators of these processes. Findings supported expected processes from mothers’ adaptive cultural characteristics to children’s ethnic-racial identification via mothers’ cultural socialization across boys and girls, however, relations varied by children’s skin tone. Findings highlight the important role of children’s individual characteristics in cultural socialization and young children’s developing ethnic-racial identification over time. Overall, given the paucity of studies that have examined ethnic-racial identification among young children, the results from Study 1 and Study 2 have the potential to stimulate growth of knowledge in this area.