Background: Adolescent alcohol use is a significant public health concern and rates of alcohol use are higher among American Indian (AI) adolescents than national samples of non-AI youth. A potential factor in understanding AI alcohol use is cultural identity, which can vary widely based on experiences of historical trauma. We used latent class analysis to examine cultural identity in AI and White adolescents and their alcohol use outcomes in relation to the latent class solutions. Methods:The samples included 3189 AI adolescents (M age = 14.76, 48.9% female) and 1579 White adolescents (M age = 15.56, 48.7% female) living on or near a reservation. Participants completed self-report measures of AI and White cultural identity affiliation, alcohol use, and alcohol-related problems. We examined (1) the best-fitting latent class solution with respect to American Indian (AI) and White cultural identity;(2) equivalence of the latent class solution; and (3) alcohol use outcomes across the optimal latent class solution.Results: Latent profile analyses indicated an optimal 3-class solution in both the AI and White samples, which differed by level of affiliation with AI and White cultural identity. While the optimal number of classes were similar across racial groups (configural profile similarity), the nature of the classes differed (structural profile dissimilarity). The three classes represented low overall scores on AI and White cultural identity (Marginalized), a mixture of high and low scores on AI and White cultural identity (Third Culture), and overall high scores on AI and White cultural identity (Bicultural).Alcohol-related problems predicted membership in the Third Culture class compared with the Marginalized class and the Bicultural class. Specifically, youth in the Third Culture class reported significantly fewer alcohol-related problems than youth in the Marginalized and Bicultural classes. Alcohol use did not predict latent class membership. Conclusions:The future-oriented nature of the Third Culture class may provide protection against adverse alcohol-related outcomes. Research is needed to test interventions that target greater future orientation and future plans to integrate culture into adolescents' lives.

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Background: North American Indigenous (NAI) communities have identified alcohol use as a primary health concern. Experiences of racial discrimination are associated with greater alcohol use, but findings are mixed regarding the role of culture in this relationship. The goal of the present study was to examine the role of culture in the association between racial discrimination and alcohol use. Methods: Across two studies (Study 1: N = 52; Study 2: N = 1743), NAI adolescents living on or near NAI reservations who reported recent alcohol use completed selfreport measures of racial discrimination, cultural affiliation, and alcohol use (e.g., frequency). Results: Bivariate correlations revealed a significant positive association between racial discrimination and alcohol use (Study 1: r = 0.31, p = 0.029; Study 2: r = 0.14, p < 0.001) but not between cultural affiliation and alcohol use. Racial discrimination and cultural affiliation were significantly positively correlated in Study 1 (r = 0.18, p < 0.001), but not in Study 2. Across both studies, the interactions between racial discrimination and cultural affiliation significantly predicted alcohol use in unadjusted models (Study 1: b = 0.70, SE = 0.32, p = 0.033, 95% CI [0.06, 1.33]; Study 2: b = 0.01, SE = 0.01, p = 0.041, 95% CI [0.001, 0.03]), such that the association between racial discrimination and alcohol use was stronger for adolescents reporting high (vs. low) levels of cultural affiliation. In adjusted models controlling for age and sex, the interaction between racial discrimination and cultural affiliation remained significant in Study 2 (b = 0.01, SE = 0.01, p = 0.0496, 95% CI [0.00002, 0.03]) but was no longer significant in Study 1. Conclusions: Findings speak to the need to reduce racial discrimination against NAI youth and to consider youths' different needs based on level of cultural affiliation to reduce subsequent alcohol consumption.

Bedtime procrastination is increasingly recognized as a widespread impediment to health-promoting sleep. Based on its potential malleability, bedtime procrastination is starting to be targeted for intervention using traditional health behavior models, but other cognitive and emotional factors that potentially modulate bedtime procrastination warrant more targeted intervention. The present research recruited college students (n = 93) with self-reported tendencies toward bedtime procrastination and low self-compassion early in the COVID-19 pandemic, and it examined a hybrid intervention model involving a single group meeting and home practices that focused on comprehensive sleep hygiene or intentional self-compassion practices, simultaneously leveraging social motivation and commitment. It also examined bedtime procrastination, sleep, emotion regulation, and procrastinatory cognitions. The study showed evidence for feasibility, acceptability, reduced bedtime procrastination, improved sleep, and moderated mediation whereby the relationship between increased self-compassion and decreased bedtime procrastination was mediated by improved emotion regulation for those with elevated reductions in procrastinatory cognition. Predictors of bedtime procrastination reduction and other relevant sequelae differed between self-compassion and sleep hygiene virtual trainings. Thus, the present research expands and synthesizes a burgeoning literature, suggesting that integrating effective elements into acceptable interventions may help reverse a cycle of self-criticism, emotion dysregulation, bedtime procrastination, and sleep-related difficulties for many who might benefit.

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