This review examines theoretical and empirical literature on children's reactions to three types of violence--child maltreatment, community violence, and interparental violence. In addition to describing internalizing and externalizing problems associated with exposure to violence, this review identifies ways that violence can disrupt typical developmental trajectories through psychobiological effects, post-traumatic stress disorder (PTSD), cognitive consequences, and peer problems. Methodological challenges in this literature include high rates of co-occurrence among types of violence exposure, co-occurrence of violence with other serious life adversities, heterogeneity in the frequency, severity, age of onset, and chronicity of exposure, and difficulties in making causal inferences. A developmental psychopathology perspective focuses attention on how violence may have different effects at different ages and may compromise children's abilities to face normal developmental challenges. Emphasis is placed on the variability of children's reactions to violence, on outcomes that go beyond diagnosable disorders, and on variables that mediate and moderate children's reactions to violence.

Coparenting is examined as an explanatory link between marital conflict and parent-child relations in 2-parent families. Data were collected from 3 samples (pilot sample, n = 220 mothers; preadolescent sample, n = 75 couples; preschool sample, n = 172 couples) by using the Coparenting Questionnaire (G. Margolin, 1992b) to assess parents' perceptions of one another on 3 dimensions--cooperation, triangulation, and conflict. Main effects for child's age and for parents' gender were found for cooperation, and an interaction between parent and child gender was found for triangulation. Regression analyses were consistent with a model of coparenting mediating the relationship between marital conflict and parenting. Discussion addresses the theoretical and clinical importance of viewing coparenting as conceptually separate from other family processes.

In the history of science, technical advances often precede periods of rapid accumulation of knowledge. Within the past three decades, discoveries that enabled the noninvasive measurement of the psychobiology of stress (in saliva) have added new dimensions to the study of health and human development. This widespread enthusiasm has led to somewhat of a renaissance in behavioral science. At the cutting edge, the focus is on testing innovative theoretical models of individual differences in behavior as a function of multilevel biosocial processes in the context of everyday life. Several new studies have generated renewed interest in salivary alpha-amylase (sAA) as a surrogate marker of the autonomic/sympathetic nervous system component of the psychobiology of stress. This article reviews sAA's properties and functions; presents illustrative findings relating sAA to stress and the physiology of stress, behavior, cognitive function, and health; and provides practical information regarding specimen collection and assay. The overarching intent is to accelerate the learning curve such that investigators avoid potential pitfalls associated with integrating this unique salivary analyte into the next generation of biobehavioral research.

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