The Dichotomy of Threat and Deprivation as Subtypes of Childhood Maltreatment: Differential Functional Connectivity Patterns of Threat and Reward Circuits in an Adult Trauma Sample.

BACKGROUND: Childhood maltreatment is associated with reduced activation of the nucleus accumbens, a central region in the reward network, and overactivity in the amygdala, a key region in threat processing. However, the long-lasting impact of these associations in the context of later-life stress is not well understood. The current study explored the association between childhood threat and deprivation and functional connectivity of threat and reward regions in an adult trauma sample. METHODS: Trauma survivors (N = 169; mean age [SD] = 32.2 [10.3] years; female = 55.6%) were recruited from a level I trauma center. Two weeks after injury, participants completed the Childhood Trauma Questionnaire (measuring experiences of threat and deprivation) and underwent resting-state functional magnetic resonance imaging. Seed-to-voxel analyses evaluated the effect of childhood threat and deprivation on amygdala and nucleus accumbens resting-state connectivity. RESULTS: Higher levels of threat were associated with increased connectivity between the right nucleus accumbens with temporal fusiform gyrus/parahippocampal gyrus and the left amygdala and the precuneus (false discovery rate-corrected p < .05). After controlling for posttraumatic symptoms 2 weeks posttrauma and lifetime trauma exposure, only the nucleus accumbens findings survived. There were no significant relationships between experiences of childhood deprivation and amygdala or nucleus accumbens connectivity. CONCLUSIONS: Experiences of threat are associated with increased nucleus accumbens and amygdala connectivity, which may reflect a preparedness to detect salient and visual stimuli. This may also reflect a propensity toward dysregulated reward processing. Overall, these results suggest that childhood threat may be contributing to aberrant neural baseline reward and threat sensitivity later in life in an adult trauma sample.

The Chivalrous Bystander: The Role of Gender-Based Beliefs and Empathy on Bystander Behavior and Perceived Barriers to Intervention.

Despite substantial evidence demonstrating a relation between gender-based beliefs and violence against women, there has been little research examining whether sexist attitudes are related to prosocial bystander behavior. Understanding psychosocial influences on bystanders' behavior could inform bystander training programs on college campuses, and so the current study examined the unique and joint effects of three gender-based attitudes (rape myth acceptance, hostile sexism, and benevolent sexism) and empathy in predicting bystander behavior and perceived barriers to intervention in situations that undergraduates (N = 500; 70% female; Mage = 18.86 years) had experienced in the prior year. Benevolent sexism was the only gender-based attitude consistently associated with bystander behavior and perceived barriers. After accounting for participant empathy, benevolent sexism uniquely predicted less intervention in post-assault situations, greater perceived barriers in pre- and post-assault situations, and greater Failure to Perceive Responsibility and Skill Deficit barriers across situations. Associations between gender-based attitudes and bystander behavior also differed for men and women, with rape myth acceptance predicting greater Failure to Perceive Responsibility barriers and benevolent sexism predicting greater Skill Deficit barriers for women but not men. These results suggest that existing bystander education programs can be improved by explicitly addressing benevolent sexist beliefs and promoting empathy for victims of assault.