Barbara J. McMorris

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OBJECTIVE Adverse childhood experiences are associated with significant functional impairment and life lost in adolescence and adulthood. This study identified relationships between multiple types of adverse events and distinct categories of adolescent violence perpetration. METHODS Data are from 136 549 students in the 6th, 9th, and 12th grades who(More)
OBJECTIVE This study examined the effects of leaving home and going to college on changes in the frequency of alcohol use, heavy episodic drinking, and marijuana use shortly after leaving high school. We also examined how protective factors in late adolescence predict post-high school substance use and moderate the effects of leaving home and going to(More)
OBJECTIVE To identify factors distinguishing adolescents across 3 groups: no self-harm, nonsuicidal self-injury (NSSI) only, and NSSI and suicide attempt (NSSI + SA). METHODS Data were from the 2007 Minnesota Student Survey. The sample included 61,330 students in grades 9 and 12. Logistic regression analysis determined factors that best distinguished(More)
This study investigated internalizing and externalizing symptoms as potential mediators of the relationship between perceived discrimination and early substance abuse among 195 American Indian 5 through 8 graders from three reservations that share a common culture (e.g., language, spiritual beliefs, and traditional practices) in the upper Midwest. The(More)
American Indian adults are thought to experience significant depressive symptoms at rates several times higher than adults in the general population, yet we know very little about factors associated with depressive symptoms among this under studied group. Many researchers have argued that depressive symptoms are associated with conflicts between American(More)
We elaborate the relationship between work hours and alcohol use during the transition from adolescence to adulthood. Both hours of employment and drinking may be products of weak bonds to school and family. Alternatively, work may exert an independent effect on alcohol use by exposing adolescents to opportunities and associates that facilitate drinking.(More)
PURPOSE To identify risk and protective factors associated with thinking about or attempting suicide among youth involved in verbal and social bullying. METHODS We analyzed data on 130,908 students in the sixth, ninth, and twelfth grades responding to the 2010 Minnesota Student Survey. Among students involved in frequent bullying (once a week or more(More)
OBJECTIVE Harm-minimization policies suggest that alcohol use is a part of normal adolescent development and that parents should supervise their children's use to encourage responsible drinking. Zero-tolerance policies suggest that all underage alcohol use should be discouraged. This article compared hypotheses derived from harm-minimization and(More)
OBJECTIVE Substance abuse remains one of the major threats to adolescent health in Western cultures. The study aim was to ascertain the extent of association between pubertal development and early adolescent substance use. METHODS The design was a cross-sectional survey of 10- to 15-year-old subjects in the states of Washington, United States, and(More)
BACKGROUND Adolescence is a key life period for the development of depression. Predicting the development of depression in adolescence through detecting specific early symptoms may aid in the development of timely screening and intervention programmes. METHODS We administered the Short Mood and Feelings Questionnaire (SMFQ) to 5769 American and Australian(More)