Oxytocin moderates the association between testosterone-cortisol ratio and trustworthiness: A randomized placebo-controlled study.

Oxytocin has been proposed to enhance feelings of trust, however, these findings have been difficult to replicate. Environmental or hormonal factors might influence this association. We studied whether oxytocin moderates the association between the testosterone-cortisol ratio, which is associated with risk taking behavior and aggression, and trustworthiness, while controlling for the general level of trust.

Endocrine markers of puberty timing and antisocial behaviour in girls and boys.

Background: Early puberty is associated with higher than average risk of antisocial behaviour, both in girls and boys. Most studies of such association, however, have focused on psychosocial mediating and moderating factors. Few refer to coterminous hormonal measures.

Intranasal administration of oxytocin decreases task-related aggressive responses in healthy young males.

Aggression and distrust are often challenging problems in mental health treatment. Converging evidence reveals that oxytocin increases trust in social interactions and decreases fear of social betrayal. However, oxytocin has also been associated with protective behavior and, as such, might increase defensive aggressive reactions.

Oxytocin, vasopressin and trust: Associations with aggressive behavior in healthy young males.

Oxytocin enhances trust during social interactions and reduces the tendency for social betrayal. Animal studies have revealed that oxytocin is also an important factor in the establishment and regulation of aggression, for which social interaction is a critical precondition. In humans, however, the effects of oxytocin appear more nuanced and influenced by social context and personality traits.

Further Evidence for Reliability and Validity of the Triarchic Psychopathy Measure in a Forensic Sample and a Community Sample.

Psychopathy is often described as a constellation of personality characteristics encompassing features such as impulsivity and antisociality, and a lack of empathy and guilt. Although the use of self-reports to assess psychopathy is still debated, there are distinct advantages to such measures and recent research suggests that they may not be as problematic as previously thought. This study further examined the reliability and validity of the Triarchic Psychopathy Measure (TriPM) in a community sample ( = 496) and forensic psychiatric patient sample ( = 217).

The evaluation stage of the Hoeven Outcome Monitor (HOM): Towards an evidence based groundwork in forensic mental health.

This study examined if a macro-, meso-, and micro outcome measurement instrument that constitutes the evaluation stage of a Dutch forensic psychiatric outcome monitor, the Hoeven Outcome Monitor (HOM), can provide a first step towards a more evidence based groundwork in forensic mental health. General, serious, very serious, special, and tbs meriting recidivism during treatment, after treatment, and overall were charted for forensic psychiatric patients discharged from a Dutch forensic psychiatric centre between 1999 and 2008 (N=164). Re-conviction data were obtained from the official Criminal Records System, and the mean follow-up time was 116.

Methodological development of the Hoeven Outcome Monitor (HOM): A first step towards a more evidence based medicine in forensic mental health.

To comply with the need for a more evidence based risk assessment and management in forensic mental health, an outcome monitor is being developed in the Dutch forensic psychiatric centre Van der Hoeven Kliniek in Utrecht, the Hoeven Outcome Monitor (HOM). Conform evidence based medicine (EBM) guidelines, the HOM is subdivided into three consecutive stages, (1) the evaluation stage, (2) the aetiology stage and (3) the implementation stage. In this article an account is provided for the design of the evaluation stage.

Positive symptoms, substance use, and psychopathic traits as predictors of aggression in persons with a schizophrenia disorder.

It is still not clear what the unique contribution of particular psychopathological factors is in explaining aggression in schizophrenia. The current study examined whether persecutory ideations, psychopathy and substance use are associated with different measures of aggressive behavior. We expected that persecutory ideations are associated with reactive aggression, and psychopathic traits are more associated with proactive aggression of inpatients.

A hormonal approach to anti-social behaviour.

Background: Altered levels of cortisol and testosterone have previously been associated with anti-social personality disorder (ASPD) and psychopathy, but there is some conflicting evidence as to how characteristic these findings are.

Aim: To test the hypothesis that diurnal fluctuations in cortisol and/or testosterone will differentiate ASPD and psychopathy among male forensic psychiatric inpatients and distinguish both groups from healthy men not in treatment.

Methods: One hundred and sixty-six men participated: 81 patients with ASPD, 42 of whom had a Psychopathy Checklist-Revised (PCL-R) score of 26 or more and 39 with a score of 25 or less, 51 forensic hospital employees and 34 general population men.

Interpreting Child Sexual Abuse: Empathy and Offense-Supportive Cognitions among Child Sex Offenders.

Researchers have suggested that child sex offenders hold distorted views on social interactions with children. Misinterpreting children's behavior and intentions could lead to sexually abusive behavior toward children. It is further suggested that the interpretation process is influenced by offenders' offense-supportive cognitions and levels of empathy.

The four-factor model of the Psychopathy Checklist--Revised: validation in a Dutch forensic inpatient sample.

In The Netherlands, the Ministry of Security and Justice requires the assessment of the Psychopathy Checklist-Revised (PCL-R; Hare, 1991; Hare, 2003) in all forensic psychiatric inpatients. To examine the four-factor structure of the Psychopathy Checklist-Revised, confirmatory factor analysis (CFA) was conducted using a Dutch sample of forensic psychiatric inpatients (N=411) and the results indicated acceptable fit. Also, using multiple group CFA, the four-factor model provided an acceptable fit in both patients with a personality disorder and patients with a psychotic disorder, and there was reasonably good evidence of measurement invariance between these two subgroups.

Interpreting child sexual abuse: the impact of victim response.

There is little empirical knowledge about whether the interpretation process of child sex offenders is offense-supportive in nature and contributes to the offending process. Vignettes were developed to compare child sex offenders' and nonoffenders' interpretations of child molestation incidents after ambiguous and nonambiguous victim responses. Results showed that child sex offenders' (N = 60) interpretations did not differ from nonoffenders' (N = 40) interpretations.

Are Child Abusers Sexually Attracted to Submissiveness? Assessment of Sex-Related Cognition With the Implicit Association Test.

Child sexual abuse is associated with social anxiety, low self-esteem, and intimacy deficits. This, in combination with the core belief of a dangerous world, might suggest that child abusers are sexually attracted to submissiveness. The Implicit Association Test (IAT) was used to examine this hypothesis.

Anti-social personality characteristics and psychotic symptoms: Two pathways associated with offending in schizophrenia.

Background: Several research groups have shown that people with schizophrenia who offend do not form a homogenous group. A three-group model claimed by Hodgins proposes distinguishing between people who start offending before the onset of psychosis (early starters), after psychosis onset but at age 34 years or under (late starters) and after psychosis onset but at age 35 years or older (late first offenders).

Aims: This study aimed to test the hypotheses (1) that the personality of early starters and non-psychotic offenders would be similar, but different from either late-starter group; (2) that the late-starter groups would be more likely to have positive psychotic symptoms than non-criminal patients with schizophrenia; and (3) that symptom types would differentiate the psychotic groups.

The startle paradigm in a forensic psychiatric setting: elucidating psychopathy.

Background: Most people who meet the diagnostic criteria for anti-social personality disorder (ASPD) do not meet the criteria for psychopathy. A differentiating feature is affective-interpersonal style. Eye blink startle reflex paradigms have been used to study affect.

Revenge: An Analysis of Its Psychological Underpinnings.

An overview of the literature and theories concerning revenge is presented in this study. The aim is to clarify the boundaries between a healthy and pathological way of dealing with revenge to improve diagnostics, with regard to both theory and clinical practice. Revenge is an intrapersonal phenomenon and the extent to which people need revenge has a certain degree of stability.

The role of ideational distress in the relation between persecutory ideations and reactive aggression.

Background: People with schizophrenia are more likely to be violent than the people without it. Feeling driven to act on persecutory delusions may be one explanation for this, but it remains unclear why some should act on such delusions but some not. Acquisition of data from people who are very ill is problematic.

Delusional distress partly explains the relation between persecutory ideations and inpatient aggression on the ward.

Previous research showed that there is an association between persecutory delusions and inpatient aggression. However, it is not clear why some persons act upon their delusions with aggression. Research showed that persons with persecutory delusions have higher levels of delusional distress resulting from these delusions.

Explaining the relationship between insecure attachment and partner abuse: the role of personality characteristics.

Studies have found that male batterers are more often insecurely attached as compared with nonbatterers. However, it is still not clear how insecure attachment is related to domestic violence. Many studies compared batterers and nonbatterers regarding pathological personality characteristics that are related to attachment (e.

Young serious and vulnerable offenders in the Netherlands: a cohort follow-up study after completion of a PIJ (detention) order.

Background: About 150-200 'Placement in an Institution for Juveniles Orders' (PIJ orders) are imposed each year in the Netherlands. Many of the young people under these orders have mental disorders or 'threatened psychological development' and are thought to be at high risk of recidivism. There are no previous studies of the range of judicial, correctional or psychiatric contacts after the PIJ order, but this could extend understanding of any links between post-treatment psychological development of these young offenders and their reoffending or desistence from it.