Jean Decety

Studies have documented associations between traumatic brain injury (TBI) and mental disorders. The relationship between psychopathic personality and TBI remains poorly understood, though both are associated with similar characteristics (e.g., low empathy, aggression, disturbances in social/moral behavior). Yet, it is not clear whether assessment of psychopathic features is influenced by presence versus absence of TBI, and which aspects of TBI may be associated with psychopathic traits. This study examined the psychopathy-TBI association in justice-involved women (N = 341) with structural equation modeling. We tested if measurement invariance of psychopathic traits was evident among those with versus without TBI and which TBI variables (number, severity, age at first TBI) predicted psychopathic features in conjunction with symptoms of psychopathology, IQ, and age. Results provided evidence of …

This study explores how providing assisted dying services affects the psychological distress of practitioners. It investigates the influence of professional norms that endorse such services within their field. Study 1 included veterinarians (N = 137, 75.2% female, Mage = 43.1 years, SDage = 12.7 years), and Study 2 health practitioner students (N = 386, 71.0% female, Mage = 21.0 years, SDage = 14.4 years). In both studies, participants indicated their degree of psychological distress following exposure to scenarios depicting assisted dying services that were relevant to their respective situations. In Study 1, we found that higher willingness to perform animal euthanasia was associated with lower distress, as were supportive norms. In Study 2, a negative association between a greater willingness to perform euthanasia and lower psychological distress occurred only when the provision of such services was …

Affect-sharing, the ability to vicariously feel another person's emotions, is the primary component of empathy that is typically thought to rely on the observer's capacity to feel the emotions of others. However, external signals, such as the target's physical characteristics, have been demonstrated to influence affect-sharing in the neuroscientific literature that speaks to the underappreciated role of external factors in eliciting affect-sharing. We consider factors that influence affect-sharing, including physical cues, emotional cues, situational factors, and observer-target relationships, as well as the neural circuits involved in these processes. Our review reveals that, while neural network activation is primarily responsible for processing affect-sharing, external factors also co-activate a top-down cognitive processing network to modulate the conscious process of affect-sharing. From this knowledge, an integrative framework of …

Individuals with acute and chronic traumatic brain injury (TBI) are associated with unique white matter (WM) structural abnormalities, including fractional anisotropy (FA) differences. Our research group previously used FA as a feature in a linear support vector machine (SVM) pattern classifier, observing high classification between individuals with and without acute TBI (i.e., an area under the curve [AUC] value of 75.50%). However, it is not known whether FA could similarly classify between individuals with and without history of chronic TBI. Here, we attempted to replicate our previous work with a new sample, investigating whether FA could similarly classify between incarcerated men with (n = 80) and without (n = 80) self-reported history of chronic TBI. Additionally, given limitations associated with FA, including underestimation of FA values in WM tracts containing crossing fibers, we extended upon our previous …

Veterinarian work may take an emotional toll on practitioners and their mental health, potentially driving premature exit from the profession. Performing animal euthanasia is frequently identified as a potential risk factor for sustainable mental health. Yet, research has demonstrated mixed results between euthanasia performance and detrimental mental health outcomes, suggesting the potential for factors that moderate this association. In this three‐wave longitudinal survey study, including 110 currently practicing veterinarians (88% female), we examined whether the type of empathy experienced by these practitioners plays a role in the association between performing animal euthanasia and career sustainability. Two types of empathy, cognitive empathy (i.e., understanding the affective experience of another) and emotional empathy (i.e., experiencing another's emotional state) were assessed. Job disengagement …

Prior work has documented considerable diversity among health practitioners regarding their support for voluntary assisted dying (VAD). We examined whether their attitudes are characterised by different combinations of personal support, normative support by other health practitioners, and whether they are predisposed to vicariously experience others’ emotions (i.e., empathy). We also examined whether these profiles experienced different mental health outcomes (i.e., burnout and posttraumatic stress) in relation to VAD. To test this, 104 Australian health practitioners were surveyed after VAD was legalised in Victoria, Australia in 2019. Results indicated that practitioners’ attitudes were characterised by three profiles: 1) strong personal and normative support (strong VAD supporters), 2) moderate personal and normative support (moderate VAD supporters), and 3) lower personal and normative support …

The Islamist group ISIS has been particularly successful at recruiting Westerners as terrorists. A hypothesized explanation is their simultaneous use of two types of propaganda: Heroic narratives, emphasizing individual glory, alongside Social narratives, which emphasize oppression against Islamic communities. Functional MRI was used to measure brain responses to short ISIS propaganda videos distributed online. 4 Heroic and 4 Social videos were shown in the MRI scanner. Brain activity in reward circuitry (particularly ventral striatum), and in mentalizing regions such as dorsomedial prefrontal cortex (dmPFC), has been shown previously to predict preferences and persuasion respectively. Here, persuasiveness was measured using post-scan predictions of recruitment effectiveness. Inter-subject correlation (ISC) analyses were used to measure commonality of brain activity time courses across individuals. ISCs in ventral striatum predicted rated persuasiveness for Heroic videos, while ISCs in mentalizing and default networks, especially in dmPFC, predicted rated persuasiveness for Social videos. Other recent work has examined interactions between reward and mentalizing networks for persuasion in general, but the observed dissociation as a function of stimulus type is novel. These results provide evidence about neural mechanisms by which propaganda persuades prospective targets, while also supporting the hypothesized distinction between Heroic and Social narratives for ISIS propaganda.

ObjectifsCet essai théorique, à travers une perspective interdisciplinaire naturaliste qui intègre les sciences biologiques et les sciences sociales, tente d’expliquer pourquoi les croyances associées à des valeurs morales peuvent conduire au dogmatisme, à des attitudes et des opinions intolérantes et parfois motiver des actions collectives violentes.MéthodeL’article s’appuie sur une analyse intégrative et sélective de la littérature empirique portant sur 138 articles (78 % d’entre eux publiés au cours des huit dernières années) en anthropologie, neuroscience, psychologie cognitive et sociale, sciences politiques et sociologie pour expliquer pourquoi et comment le processus de moralisation augmente fortement la force des croyances et des attitudes – en certitude et importance – ce qui, à son tour, motive l’engagement social et induit un extrémisme attitudinal quelle que soit l’appartenance idéologique, politique ou …