Inside the mindful moment: The effects of brief mindfulness practice on large-scale network organization and intimate partner aggression.

Mindfulness can produce neuroplastic changes that support adaptive cognitive and emotional functioning. Recently interest in single-exercise mindfulness instruction has grown considerably because of the advent of mobile health technology. Accordingly, the current study sought to extend neural models of mindfulness by investigating transient states of mindfulness during single-dose exposure to focused attention meditation. Specifically, we examined the ability of a brief mindfulness induction to attenuate intimate partner aggression via adaptive changes to intrinsic functional brain networks. We employed a dual-regression approach to examine a large-scale functional network organization in 50 intimate partner dyads (total n = 100) while they received either mindfulness (n = 50) or relaxation (n = 50) instruction. Mindfulness instruction reduced coherence within the Default Mode Network and increased functional connectivity within the Frontoparietal Control and Salience Networks. Additionally, mindfulness decoupled primary visual and attention-linked networks. Yet, this induction was unable to elicit changes in subsequent intimate partner aggression, and such aggression was broadly unassociated with any of our network indices. These findings suggest that minimal doses of focused attention-based mindfulness can promote transient changes in large-scale brain networks that have uncertain implications for aggressive behavior.

Neural mechanisms of intergroup exclusion and retaliatory aggression.

Aggression occurs frequently and severely between rival groups. Although there has been much study into the psychological and socio-ecological determinants of intergroup aggression, the neuroscience of this phenomenon remains incomplete. To examine the neural correlates of aggression directed at outgroup (versus ingroup) targets, we recruited 35 healthy young male participants who were current or former students of the same university. While undergoing functional MRI, participants completed an aggression task against both an ingroup and an outgroup opponent in which their opponents repeatedly provoked them at varying levels and then participants could retaliate. Participants were then socially included and then excluded by two outgroup members and then completed the same aggression task against the same two opponents. Both before and after outgroup exclusion, aggression toward outgroup members was positively associated with activity in the ventral striatum during decisions about how aggressive to be toward their outgroup opponent. Aggression toward outgroup members was also linked to greater post-exclusion activity in the rostral and dorsal medial prefrontal cortex during provocation from their outgroup opponent. These altered patterns of brain activity suggest that frontostriatal mechanisms may play a significant role in motivating aggression toward outgroup members.

Measurement Invariance and Item Response Theory Analysis of the Taylor Aggression Paradigm.

The Taylor Aggression Paradigm (TAP) is a widely used laboratory aggression task, yet item response theory analyses of this task are nonexistent. To estimate these aspects of the TAP, we combined data from nine laboratory studies that employed the 25-trial version of the TAP (combined N = 1,856). One- and four-factor solutions for the TAP data exhibited evidence of measurement invariance across gender (men vs. women) and experimental provocation (negative vs. positive social feedback), as well as negligible instances of differential item functioning. As such, psychometric properties of the TAP were invariant across binary representations of gender and experimental provocation. Furthermore, trials following low and high provocation were the least informative and those following moderate provocation were the most informative. Scoring approaches to the TAP may benefit from giving greater weight to trials following moderate provocation. Overall, we find great utility in applying item response theory approaches to behavioral laboratory tasks.

Neural mechanisms of intimate partner aggression.

People sometimes hurt those they profess to love; yet our understanding of intimate partner aggression (IPA) and its causes remains incomplete. We examined brain activity using functional magnetic resonance imaging (fMRI) in an ethnically and racially diverse sample of 50 female-male, monogamous romantic couples as they completed an aggression task against their intimate partner, a close friend, and a different-sex stranger. Laboratory and real-world IPA were uniquely associated with altered activity within and connectivity between cortical midline structures that subserve social cognition and the computation of value. Men's IPA most corresponded to lower posterior cingulate reactivity during provocation and women's IPA most corresponded to lower ventromedial prefrontal cortex activity during IPA itself. Actor-partner independence modeling suggested women's IPA may correspond to their male partner's neural reactivity to provocation. Broadly, these findings highlight the importance of self-regulatory functions of the medial cortex and away from effortful inhibition subserved by dorsolateral cortices.

What makes a "successful" psychopath? Longitudinal trajectories of offenders' antisocial behavior and impulse control as a function of psychopathy.

Psychopathy is a considerable risk factor for violent behavior. However, many psychopathic individuals refrain from antisocial and criminal acts. The mechanisms underlying the formation of this "successful" phenotype are uncertain. We tested a compensatory model of "successful" psychopathy, which posits that relatively "successful" psychopathic individuals develop greater conscientious traits that serve to inhibit their heightened antisocial impulses. To test this model, we examined the 7-year longitudinal Research on Pathways to Desistance study of 1,354 adjudicated adolescents. Higher initial psychopathy was associated with steeper increases in general inhibitory control and the inhibition of aggression over time. This effect was magnified among "successful" offenders (i.e., those who reoffended less). These findings support our compensatory model, suggesting that psychopathic individuals who develop greater self-regulatory control over their antisocial impulses become relatively more "successful" than their less regulated counterparts. Moreover, our results speak of the importance of the five-factor model for understanding psychopathy and the crucial role of conscientiousness in the form that psychopathic individuals take. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

Construct Validation of Experimental Manipulations in Social Psychology: Current Practices and Recommendations for the Future.

Experimental manipulations in social psychology must exhibit construct validity by influencing their intended psychological constructs. Yet how do experimenters in social psychology attempt to establish the construct validity of their manipulations? Following a preregistered plan, we coded 348 experimental manipulations from the 2017 issues of the Journal of Personality and Social Psychology. Representing a reliance on "on-the-fly" experimentation, the vast majority of these manipulations were created ad hoc for a given study and were not previously validated before implementation. A minority of manipulations had their construct validity evaluated by pilot testing before implementation or via a manipulation check. Of the manipulation checks administered, most were face valid, single-item self-reports, and only a few met criteria for "true" validation. In aggregate, roughly two fifths of manipulations relied solely on face validity. To the extent that they are representative of the field, these results suggest that best practices for validating manipulations are not commonplace-a potential contributor to replicability issues. These issues can be remedied by validating manipulations before implementation using validated manipulation checks, standardizing manipulation protocols, estimating the size and duration of manipulations' effects, and estimating each manipulation's effects on multiple constructs within the target nomological network.

An investigation of the relationship between psychopathy and greater gray matter density in lateral prefrontal cortex.

Psychopathic traits predispose individuals toward antisocial behavior. Such antagonistic acts often result in "unsuccessful" outcomes such as incarceration. What mechanisms allow some people with relatively high levels of psychopathic traits to live "successful", unincarcerated lives, in spite of their antisocial tendencies? Using neuroimaging, we investigated the possibility that "successful" psychopathic individuals exhibited greater development of neural structures that promote "successful" self-regulation, focusing on the ventrolateral prefrontal cortex (VLPFC). Across two structural magnetic resonance imaging studies of "successful" participants (Study 1: N = 80 individuals in long-term romantic relationships; Study 2: N = 64 undergraduates), we observed that gray matter density in the left and right VLPFC was positively associated with psychopathic traits. These preliminary results support a compensatory model of psychopathy, in which "successful" psychopathic individuals develop inhibitory mechanisms to compensate for their antisocial tendencies. Traditional models of psychopathy that emphasize deficits may be aided by such compensatory models that identify surfeits in neural and psychological processes.