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Neuropsychiatric Disease and Treatment 2024Despite numerous studies investigating personality disorder (PD) and childhood maltreatment (CM) characteristics in individuals with schizophrenia (SZ), there remains a...
INTRODUCTION
Despite numerous studies investigating personality disorder (PD) and childhood maltreatment (CM) characteristics in individuals with schizophrenia (SZ), there remains a scarcity of research focusing on sex differences in PD and CM within large samples of SZ patients.
METHODS
A total of 592 participants (257 males, 335 females) were consecutively sampled from patients diagnosed with SZ at the psychiatric and psycho-counseling clinics at Shanghai Mental Health Center. PDs were assessed using a self-reported personality diagnostic questionnaire and a structured clinical interview, while CMs were evaluated using the Chinese version of the Child Trauma Questionnaire Short Form.
RESULTS
Male patients exhibited a prominent self-reported trait of antisocial PD (=1.972, =0.049), while female patients demonstrated a notable emphasis on histrionic PD traits (=-2.057, =0.040). Structured interviews for PD diagnoses further indicated a higher comorbidity of schizotypal (=4.805, =0.028) and schizoid (=6.957, =0.008) PDs among male patients compared to female patients. Additionally, male patients reported a higher degree (=2.957, =0.003) and proportion (=5.277, =0.022) of experiences of physical abuse in their self-reported CM. Logistic regression analyses highlight distinct factors: higher antisocial PD traits and physical abuse are associated with male patients, while histrionic PD traits and emotional abuse are associated with female patients.
DISCUSSION
These findings underscore the importance of recognizing and addressing sex-specific manifestations of personality pathology and the nuanced impact of CM in the clinical management of individuals with SZ. The study advocates for tailored interventions that consider the distinct needs associated with sex differences in both personality traits and CM experiences among SZ patients.
PubMed: 38741581
DOI: 10.2147/NDT.S462346 -
Scientific Reports May 2024Maladaptive personality traits, such as 'dark personalities' are found to result in a diverse set of negative outcomes, including paraphilic interests and associated...
Maladaptive personality traits, such as 'dark personalities' are found to result in a diverse set of negative outcomes, including paraphilic interests and associated (illegal) behaviors. It is however unclear how these are exactly related, and if related, if then only those individuals higher on dark personality traits and higher impulsivity engage in paraphilic behaviors. In the current study, 50 participants were recruited to investigate the relationship between Dark Tetrad personality traits (i.e., narcissism, psychopathy, Machiavellianism and everyday sadism), paraphilic interests (arousal and behavior) and the moderating role of impulsivity. Personality and paraphilic interests were investigated through self-report questionnaires. Impulsivity was measured both through self-reported dysfunctional impulsivity and the P3 event related potential using electroencephalography during the Go/No-Go task (i.e. response inhibition). The results showed that there was a positive association between psychopathy, sadism and paraphilic interests. Whereas everyday sadism was associated with paraphilic (self-reported) arousal, psychopathy was associated with paraphilic behavior. Although P3 amplitude was not associated with paraphilic interests, self-reported dysfunctional impulsivity was associated with paraphilic behavior specifically. However, there was no moderating role of dysfunctional impulsivity and response inhibition (P3) in the relationship between psychopathy and paraphilic behavior. Findings indicate that the relation between specific dark personalities and paraphilic interests may be more complex than initially thought. Nevertheless, risk assessment and intervention approaches for paraphilia and related behavior both may benefit from incorporating Dark Tetrad and impulsivity measurements.
Topics: Humans; Impulsive Behavior; Male; Electroencephalography; Female; Adult; Antisocial Personality Disorder; Machiavellianism; Narcissism; Young Adult; Sadism; Personality; Paraphilic Disorders; Self Report
PubMed: 38740864
DOI: 10.1038/s41598-024-61214-z -
Journal of Neuropsychology May 2024Moral identity is an important moral variable which has positive moral functions, such as contributing to prosocial behaviours, reducing antisocial behaviours, and...
Moral identity is an important moral variable which has positive moral functions, such as contributing to prosocial behaviours, reducing antisocial behaviours, and resisting the risk factors of antisocial behaviours. However, little is known about the neural correlates of moral identity and the neural basis of the effect of moral identity on the risk factors of antisocial behaviours, including moral disengagement. In this study, we explored these issues in 142 college students by estimating the regional homogeneity (ReHo) through resting-state functional magnetic resonance imaging (fMRI). The whole-brain correlation analyses found that higher internalized moral identity was correlated with higher ReHo in the precuneus. Furthermore, the ReHo in the precuneus was negatively correlated with moral disengagement, suggesting positive moral functions of the neural mechanisms of moral identity. These findings deepen our understanding of individual differences in moral identity and provide inspiration for the education of moral identity and the intervention for moral disengagement from the perspective of the brain.
PubMed: 38738605
DOI: 10.1111/jnp.12371 -
Development and Psychopathology May 2024Substance use disorders among juveniles are a major public health concern and are often intertwined with other psychosocial risk factors including antisocial behavior....
Substance use disorders among juveniles are a major public health concern and are often intertwined with other psychosocial risk factors including antisocial behavior. Identifying etiological risks and mechanisms promoting substance use disorders remains a high priority for informing more focused interventions in high-risk populations. The present study examined brain gray matter structure in relation to substance use severity among = 152 high-risk, incarcerated boys (aged 14-20). Substance use severity was positively associated with gray matter volume across several frontal/striatal brain regions including amygdala, pallidum, putamen, insula, and orbitofrontal cortex. Effects were apparent when using voxel-based-morphometric analysis, as well as in whole-brain, data-driven, network-based approaches (source-based morphometry). These findings support the hypothesis that elevated gray matter volume in striatal reward circuits may be an endogenous marker for vulnerability to severe substance use behaviors among youth.
PubMed: 38738358
DOI: 10.1017/S0954579424000804 -
Biological Psychology Jul 2024This study examined the empathic processing of individuals with psychopathic traits and healthy controls in response to pain, applying affective perspective-taking (Self...
This study examined the empathic processing of individuals with psychopathic traits and healthy controls in response to pain, applying affective perspective-taking (Self vs. Other). Twenty subjects with high psychopathic traits and twenty control subjects performed pain judgment tasks in the study. During the tasks, late positive potentials (LPPs) of the participants were measured to assess emotional processing in reaction to visual stimuli depicting painful or non-painful situations. In early LPP time stage (500-700 ms), the control group and the psychopathic trait group exhibited comparable levels of empathic processing regarding pain. However, in late LPP time window (700-1100 ms), the control group showed a greater LPP amplitude to Pain stimuli than No-pain stimuli, whereas the psychopathic trait group exhibited non-significant amplitude differences between Pain and No-pain stimuli. These findings imply that individuals with high psychopathic traits may swiftly terminate the processing and encounter difficulties in reappraising distress cues, especially in the late stage, providing psychophysiological support for distinctive empathic processing with temporal aspects.
Topics: Humans; Male; Young Adult; Judgment; Electroencephalography; Empathy; Pain; Adult; Antisocial Personality Disorder; Female; Evoked Potentials; Photic Stimulation; Reaction Time
PubMed: 38723762
DOI: 10.1016/j.biopsycho.2024.108810 -
PloS One 2024Psychopathy is a severe personality disorder marked by a wide range of emotional deficits, including a lack of empathy, emotion dysregulation, and alexithymia. Previous...
Psychopathy is a severe personality disorder marked by a wide range of emotional deficits, including a lack of empathy, emotion dysregulation, and alexithymia. Previous research has largely examined these emotional impairments in isolation, ignoring their influence on each other. Thus, we examined the concurrent interrelationship between emotional impairments in psychopathy, with a particular focus on the mediating role of alexithymia. Using path analyses with cross-sectional data from a community sample (N = 315) and a forensic sample (N = 50), our results yielded a statistically significant mediating effect of alexithymia on the relationship between psychopathy and empathy (community and forensic) and between psychopathy and emotion dysregulation (community). Moreover, replacing psychopathy with its three dimensions (i.e., meanness, disinhibition, and boldness) in the community sample revealed that boldness may function as an adaptive trait, with lower levels of alexithymia counteracting deficits in empathy and emotion dysregulation. Overall, our findings indicate that psychopathic individuals' limited understanding of their own emotions contributes to their lack of empathy and emotion dysregulation. This underscores the potential benefits of improving emotional awareness in the treatment of individuals with psychopathy.
Topics: Humans; Affective Symptoms; Empathy; Male; Adult; Female; Antisocial Personality Disorder; Cross-Sectional Studies; Middle Aged; Emotions; Emotional Regulation; Young Adult
PubMed: 38718018
DOI: 10.1371/journal.pone.0301085 -
Military Psychology : the Official... May 2024Military conscription is a legal obligation in many countries. Different psychiatric disorders may result in exemptions from compulsory military service. The study...
Military conscription is a legal obligation in many countries. Different psychiatric disorders may result in exemptions from compulsory military service. The study aimed to compare psychiatric diagnoses, and demographic and clinical characteristics of individuals exempted from conscription between the call-up and military service groups. The study analyzed exemption reports based on psychiatric evaluations conducted between 2016 and 2020 at a regional military hospital in Türkiye. Exemptions from conscription at the call-up stage and during military service were compared regarding sociodemographic characteristics, clinical information, and psychiatric diagnoses. The study included 1225 exemption reports. The most common psychiatric diagnoses were intellectual disability and adjustment disorder. The exemption at the call-up group showed higher rates of psychiatric disability reports, intellectual disability, antisocial personality disorder, and depressive disorders. In contrast, the exemption during military service group had a higher history of substance use and prevalence of adjustment disorder. At the call-up, intellectual disability, antisocial personality disorder, and psychiatric medication predicted exemption. Adjustment disorder was the predictive factor for exemption during military service The study delineated crucial clinical and psychiatric distinctions among those exempted from conscription during call-up versus military service. Awareness of exemptions during military service can significantly contribute to improving the roll call examination during the call-up. The findings emphasize the need for targeted assessments and strategies for managing psychiatric disorders in the military context.
PubMed: 38695751
DOI: 10.1080/08995605.2024.2347814 -
BMC Psychiatry May 2024Adverse childhood events (ACEs), psychopathy, and self-harming behaviours are prevalent among individuals in the forensic psychiatry system. While existing literature...
BACKGROUND
Adverse childhood events (ACEs), psychopathy, and self-harming behaviours are prevalent among individuals in the forensic psychiatry system. While existing literature suggests that ACEs, self-harm, and psychopathy are interrelated, little is known about the interplay of psychopathic traits in this relationship. The present study aimed to determine the mediating role of psychopathy in the relationship between ACEs and self-harming behaviours in forensic patients.
METHODS
This was a retrospective study of patients under the Ontario Review Board (ORB) between 2014 and 2015. In the analysis, we included patients with complete data on ACEs, self-harming behaviours, and a Psychopathy Checklist-Revised (PCL-R) score - a measure of psychopathic traits and their severity conducted during the reporting period. Mediation analysis was based on the Baron and Kenny approach, and sensitivity analysis was performed based on the types of ACEs.
RESULTS
The sample population (n = 593) was made up of adults, with a mean age of 41.21 (± 12.35) years and were predominantly males (92.37%). While there was a partial mediating effect of psychopathy on the relationship between ACEs and incidents of self-harming behaviours in the past year, the mediation was complete in the relationship between ACEs and a lifetime history of self-harming behaviours. Following sensitivity analysis based on the types of ACE, the mediating effects were more attributed to specific ACEs, especially having experienced child abuse or having an incarcerated household member before 18 years.
CONCLUSION
Among forensic patients in Ontario, psychopathy mediates the relationship between experiencing ACEs and engaging in self-harming behaviours. Effective intervention to mitigate self-harming behaviours in this population should consider the potential role of psychopathy, especially among individuals who have experienced ACEs involving a history of child abuse and a family who was incarcerated.
Topics: Humans; Male; Self-Injurious Behavior; Female; Ontario; Adult; Retrospective Studies; Adverse Childhood Experiences; Middle Aged; Antisocial Personality Disorder; Forensic Psychiatry; Child
PubMed: 38693475
DOI: 10.1186/s12888-024-05771-7 -
Personality Neuroscience 2024Psychiatric illnesses form spectra rather than categories, with symptoms varying continuously across individuals, i.e., there is no clear break between health and...
Psychiatric illnesses form spectra rather than categories, with symptoms varying continuously across individuals, i.e., there is no clear break between health and disorder. Dimensional measures of behaviour and brain activity are promising targets for studying biological mechanisms that are common across disorders. Here, we assessed the extent to which neural measures of the sensitivity of the three biological systems in the reinforcement sensitivity theory (RST) could account for individual differences in a latent general factor estimated from symptom counts across externalising disorders (EXTs). RST explanatory power was pitted against reduced P300, a reliable indicator of externalising per previous research. We assessed 206 participants for DSM-5 EXTs (antisocial personality disorder, conduct disorder, attention-deficit/hyperactivity disorder, intermittent explosive disorder symptoms, alcohol use disorder, and cannabis use disorder). Of the final sample, 49% met diagnostic criteria for at least one of the EXTs. Electroencephalographic measures of the sensitivities of the behavioural activation system (BAS), the fight/flight/freeze system, and the behavioural inhibition system (BIS), as well as P300 were extracted from the gold bar-lemon and stop-signal tasks. As predicted, we found that low neural BIS sensitivity and low P300 were uniquely and negatively associated with our latent factor of externalising. Contrary to prediction, neural BAS/"dopamine" sensitivity was not associated with externalising. Our results provide empirical support for low BIS sensitivity and P300 as neural mechanisms common to disorders within the externalising spectrum; but, given the low N involved, future studies should seek to assess the replicability of our findings and, in particular, the differential involvement of the three RST systems.
PubMed: 38689856
DOI: 10.1017/pen.2023.11 -
Scientific Reports Apr 2024This study aimed to develop the Global Assessment of Active Trolling and Passive Bystanderism (GAATPB) scale and investigate the influence of personality traits on...
This study aimed to develop the Global Assessment of Active Trolling and Passive Bystanderism (GAATPB) scale and investigate the influence of personality traits on trolling behaviors. Focusing on the Dark Tetrad (DT) traits and agreeableness, the present study examined their associations and predictive utility on active trolling and passive bystanderism. Participants were recruited from social networking sites (SNSs), and eligibility criteria included active SNS usage and engagement in online interactions. A total of 797 healthy adult students participated in the study, with data from 300 used for the initial exploratory factor analysis (EFA) and the remaining 497 (M = 22.25 years, SD = 3.37) for the subsequent analyses. Results indicated a significant correlation between DT traits and agreeableness across both active trolling and passive bystanderism, revealing a shared personality profile. Hierarchical multiple regression analyses showed that narcissism, Machiavellianism, and trait sadism were predictors of active trolling, with psychopathy being the strongest predictor. However, psychopathy did not emerge as a predictor for passive bystanderism. The study also highlighted that DT traits mediated the relationship between lower agreeableness and overall trolling behavior, suggesting that trolling manifests from lower agreeableness through the instigation of callous-unemotional, manipulative, and self-centered traits inherent in DT.
Topics: Humans; Male; Female; Adult; Young Adult; Antisocial Personality Disorder; Personality; Machiavellianism; Adolescent; Narcissism; Students
PubMed: 38688968
DOI: 10.1038/s41598-024-60203-6