Lead exposure and child maltreatment as models for how to conceptualize early-in-life risk factors for violence

Although rates of violent crime have been on the decline in the United States for the past two decades, young people—and particularly young men—continue to commit and fall victim to alarmingly high rates of violence. Effective prevention requires data on what the determinants of violence are and when in the life course they emerge. The goal of this review was to identify early-in-life risk factors for violence and to describe (a) who is most affected and (b) effect mechanisms. I focus on abuse and neglect and exposure to lead as risk factors for violence that disproportionately affect young children and that are likely to have causal effects on development. I conclude with future directions for research and intervention.     

A developmental origins perspective on the emergence of violent behavior in males with prenatal substance exposure

Children with prenatal substance exposure are at increased risk for externalizing behavior problems and violence. However, the contribution of early life experiences for placing these individuals at risk is not well understood. Utilizing a sample of 1,388 children with prenatal substance exposure from the Maternal Lifestyle Study, we attempt to shed light on these contributing factors by examining the impact of infant temperament, maternal sensitivity, and early life stress on the expression of violent behavior at ages 12 through 14 years. Males may be more at risk for increases in violent behavior in early adolescence through a number of early life experiences, such as variability in responses to maternal flexibility and engagement related to individual differences in temperament, as well as exposure to early adversity. Comparing two prevailing developmental theoretical frameworks, deficit models and differential susceptibility, we aim to understand the developmental origins of violent behavior in males by identifying children who may be most susceptible to early caregiving experiences.     

Early-life risk for domestic violence perpetration: Implications for practice and policy

Research on risks and causes of domestic violence is hampered by a policy framework that not only does not fund but in some cases suppresses inquiry into those causes. This discussion, then, will be placed in the context of those policy frameworks that hamper and distort inquiry. This includes an overview of ideological, political, and historical issues that have shaped those frameworks. Related explanatory theories and theories of practice are summarized. The article will examine known early-life risk factors for those disorders and behaviors associated with domestic violence perpetration. Particular emphasis will be placed on maltreatment and attachment/bonding processes. Framed in broad perspectives of psychosocial theory, risk factors from related literature sources (e.g. general violence and criminality) will be included where risk profiles are substantially similar.     

The early biopsychosocial development of boys and the origins of violence in males

We apply a biopsychosocial approach to introduce early-in-life experiences that explain a significant part of the male preponderance in the perpetration of violence. Early caregiver abuse and neglect, father absence, and exposure to family and neighborhood violence exacerbate boys’ greater risk for aggressive behavior and increase the probability of carrying out violent acts later in life. We examine the development of the psychological self and explore conditions that encourage physical aggression, focusing on the impact on the infant and toddler's emergent mental representation of self, others, and self–other relationships. Boys’ slower developmental timetable in the first years of life may enhance their vulnerability for disorganization in emergent neurobiological networks mediating organization of socioemotional relationships. Emergent attachment and activation relationship systems may differentially affect risk and resilience in boys and girls, particularly in single-parent families. Evidence has suggested that the dramatic increase in single-parent families is especially linked to corresponding increases in behavioral undercontrol, antisocial behavior, and the emergence of violence in boys.