ABSTRACT
Conduct problems (CP) in childhood and adolescence have a significant impact on the individual, family, and community. To improve treatment for CP, there is a need to improve the understanding of the developmental pathways leading to CP in boys and girls. Prior research has linked the child's fearlessness and callous-unemotional (CU) traits, as well as experiences of parental warmth and punitive parenting, to CP. However, few studies have tested the interplay of these factors in contributing to future CP development. The present study aimed to test the InterFear model, which suggests that fearlessness in early childhood leads to CP through an indirect pathway involving low positive parenting, high negative/punitive parenting, and callous-unemotional (CU) traits. The sample included 2467 Spanish children (48.1% girls; Mage = 4.25; SD = 0.91), followed up across a five-year period. Besides a direct association between fearlessness in early childhood and future CP, the results found an indirect pathway whereby fearlessness reduces positive parenting and increases punitive parenting, which contributes to the development of CU traits and sets the stage for CP in later childhood. The specific indirect effect from fearlessness to CP via CU traits accounted for most of the variance, suggesting the existence of a temperamental pathway independent of parental variables. Further, two additional indirect pathways, exclusive of fearlessness, were identified, which started with low parental warmth and positive parenting, leading to CP via CU traits. These findings support the InterFear model, demonstrating multiple pathways to CP with the involvement of fearlessness, parenting practices, and CU traits. This model might play a pivotal role in the development of targeted prevention and intervention strategies for CP.
ABSTRACT
The current study examined the psychometric properties of the Proposed Specifiers for Conduct Disorder (PSCD) in a sample of school-attending adolescent Belgian youth (N = 599; M age = 16.51 years, SD = 1.27). Given the recent interest in the PSCD-Short Version (PSCD-SV), this study focused on the 13-item variant of the PSCD. Study findings showed that the PSCD-SV had a hierarchical four-factor structure including the components of grandiose-manipulative (GM), callous-unemotional (CU), daring-impulsive (DI), and conduct disorder (CD). These interrelated factors were found to be internally consistent. The study also showed that the PSCD-SV total score was positively and significantly related to an alternate measure of psychopathy. Further, the study revealed the PSCD-SV was meaningfully related to the five-factor personality domains (i.e., extraversion, conscientiousness, agreeableness) as well as peer functioning and prosocial behavior. Bivariate correlations demonstrated that the dimensions differed in their associations with external correlates (e.g., peer functioning). Regression analyses showed that the GM, CU, and CD components of the PSCD-SV were uniquely associated to externalizing difficulties, whereas only the GM and CU components of the PSCD-SV were associated with low prosocial behaviors. These findings shed light on the conceptual and developmental models for the consideration of psychopathy and conduct problems. The use of the broader psychopathy condition as well as its underpinning dimensions may have important implications for assessment, treatment, and diagnostic manuals. The implications of the current study are further discussed.
Subject(s)
Conduct Disorder , Humans , Adolescent , Conduct Disorder/diagnosis , Conduct Disorder/psychology , Self Report , Belgium , Antisocial Personality Disorder/diagnosis , PersonalityABSTRACT
OBJECTIVE: To better describe and treat children with conduct problems (CP), grandiose-manipulative and daring-impulsive traits are proposed for subtyping CP, instead of using only a callous-unemotional specifier. However, the acclaimed benefits of having multiple specifiers for CP remain largely untested and therefore highly speculative. To fill this gap, this study tested longitudinal relations between these 3 specifiers and developmental outcomes in childhood and adolescence, independent of early childhood CP. METHOD: Longitudinal data from 2 community studies were used. Teacher ratings were used to measure CP and the specifiers in 3- to 5-year-olds from Sweden (n = 2,064) and Spain (n = 2,055). Developmental outcomes were assessed by multiple informants (ie, teachers, parents, and children) 1 to 8 years later. RESULTS: Early childhood CP were predictive of all outcomes. Callous-unemotional traits predicted low levels of social competence and prosocial behavior, independent of CP (and age, sex, and socioeconomic status). Grandiose-manipulative and daring-impulsive traits were predictive of aggression and violent delinquency, respectively, independent of CP, but also of higher levels of prosocial behavior or social competence. CONCLUSION: The 3 specifiers are predictive of different outcomes, independent of CP, which is thought to form the basis for developing specifiers for CP. Findings tentatively challenge the centrality of callous-unemotional traits for subtyping CP, but it is premature to conclude that grandiose-manipulative and daring-impulsive specifiers are needed in future revisions of DSM and ICD. Efforts to systematically evaluate the utility of these specifiers should be welcomed to inform ongoing debates on this matter.
Subject(s)
Conduct Disorder , Problem Behavior , Child , Adolescent , Humans , Child, Preschool , Antisocial Personality Disorder/psychology , Prognosis , Conduct Disorder/diagnosis , Conduct Disorder/psychology , Aggression , EmotionsABSTRACT
The Proposed Specifier for Conduct Disorder (PSCD) was developed to measure the broad psychopathy construct with grandiose-manipulative, callous-unemotional, daring-impulsive, and conduct disorder subscales. This study tested the psychometric properties of Persian parent-and-child self-report PSCD versions with 974 parents (86% mothers) and children/adolescents (46.5% boys) dyads. Results showed that with some modifications the proposed hierarchical four-factor structure for both PSCDs was confirmed and was found to be invariant across gender. Across versions, all PSCD scores were internally consistent and demonstrated expected correlations with parent-reported externalizing problems, anxiety/depression, and poor school performance, supporting the PSCDs scores' validity. This study also is the first to examine and establish acceptable to excellent parent-child agreement of PSCD scores. Finally, all PSCD child-report scores offered small though significant incremental validity over their corresponding PSCD parent-version scores in predicting parent-reported conduct problems and proactive aggression. Findings indicated that both Persian PSCDs may hold promise for assessing psychopathy components in Iranian school-attending adolescents and generating additional research on this topic.
Subject(s)
Conduct Disorder , Male , Female , Humans , Adolescent , Conduct Disorder/diagnosis , Conduct Disorder/psychology , Self Report , Iran , Antisocial Personality Disorder , Parents , Reproducibility of ResultsABSTRACT
Parental practices are associated with psychopathic traits across several developmental stages. However, the majority of available studies focused mainly on the affective dimension of psychopathy, namely callous-unemotional traits, disregarding the grandiose-deceitful and impulsivity-need for stimulation dimensions. The current study examines the distinct associations between all three dimensions with parental practices (parental involvement, poor monitoring, inconsistent discipline, and corporal punishment) after considering the effect of conduct problems (CPs) and sex in a Greek-Cypriot primary school sample (N = 792, Mage = 6.93, SD = 0.72) and a Dutch clinical-referred sample (N = 217, Mage = 9.55, SD = 1.79) of children. In the community sample, hierarchical multiple regression analysis revealed that parents of children with high levels of callous-unemotional traits were more likely to engage in inconsistent discipline but less in positive parental practices. In contrast, high levels of impulsivity-need for stimulation were related to inconsistent discipline. In the clinical sample, callous-unemotional traits were associated with less parental involvement and grandiose-deceitful dimension with high levels of inconsistent discipline. These findings suggest that the three psychopathy dimensions have unique relations with parental practices above and beyond CPs, proposing that parental practices may be influenced more strongly by psychopathic traits than by antisocial behavior.
Subject(s)
Conduct Disorder , Problem Behavior , Child , Humans , Greece , Conduct Disorder/psychology , Antisocial Personality Disorder/psychology , ParentsABSTRACT
Different scoring methods have been proposed to identify adolescents with high levels of callous-unemotional (CU) traits as measured by the Inventory of Callous-Unemotional traits (ICU). This is the first study to scrutinize the usefulness of the normative, empirical, and DSM-5 with Limited Prosocial Emotions (LPE) scoring methods in criminal justice-involved girls (N = 192). Girls (Mage = 15.74) completed the ICU and other self-report questionnaires. A diagnostic interview was used to determine the presence of conduct disorder (CD) and other psychiatric disorders. Official arrest and rearrest data were also collected. The three scoring methods designated girls with (versus without) CU traits who scored higher on various indices of past and future antisocial behavior, exhibited higher rates of (childhood-onset) CD and higher levels of psychopathic traits, and displayed lower levels of agreeableness and conscientiousness. It was only when the normative and empirical scoring methods were applied that girls with CU traits had higher rates of substance use disorders and were less anxious, depressed, and/or neurotic. In a subsample of girls with CD (N = 119), the three scoring methods captured a more severely antisocial subgroup. Other expected group differences emerged, though mainly when the normative scoring method was used. Results provided support for the clinical utility of the three scoring methods but also showed that the normative scoring method most aligns with theoretical expectations. Research is warranted to explore if this normative scoring method serves as a better categorically-defined specifier for CD than the specifier that is incorporated in the DSM-5.
Subject(s)
Conduct Disorder , Female , Humans , Adolescent , Child , Conduct Disorder/diagnosis , Conduct Disorder/psychology , Research Design , Emotions , Antisocial Personality Disorder/diagnosis , Antisocial Personality Disorder/psychologyABSTRACT
The Proposed Specifiers for Conduct Disorder (PSCD) scale was developed to advance the study of child and adolescent psychopathy, especially as it relates to conduct disorder. This study is the first to test the factor structure, measurement invariance, internal consistency, and validity of the Persian PSCD self-report version in a gender-mixed sample of 1,506 school-attending 11 to 18 years old youth (M age = 15.23; SD = 1.83; 49.60% boys). Confirmatory factor analysis supported the proposed four-factor hierarchical structure of the PSCD, though with 19 items loaded on grandiose-manipulative, callous-unemotional, daring-impulsive, and conduct disorder components. This factor structure was also invariant across gender. The PSCD total and four components scores were internally consistent and exhibited the expected relations with proactive aggression, externalizing problems, anxiety and depression, and poor school performance, supporting the PSCD scores' convergent, discriminant, and criteria validity. The findings indicated that with some modifications, the Persian PSCD might hold promise for assessing psychopathy components in Iranian school-attending adolescents and may spark additional research in a variety of settings.
Subject(s)
Conduct Disorder , Male , Child , Humans , Adolescent , Female , Conduct Disorder/diagnosis , Conduct Disorder/psychology , Self Report , Iran , Antisocial Personality Disorder/psychology , Aggression/psychology , Reproducibility of ResultsABSTRACT
This study introduces and illustrates the potential of an integrated multi-omics approach in investigating the underlying biology of complex traits such as childhood aggressive behavior. In 645 twins (cases = 42%), we trained single- and integrative multi-omics models to identify biomarkers for subclinical aggression and investigated the connections among these biomarkers. Our data comprised transmitted and two non-transmitted polygenic scores (PGSs) for 15 traits, 78,772 CpGs, and 90 metabolites. The single-omics models selected 31 PGSs, 1614 CpGs, and 90 metabolites, and the multi-omics model comprised 44 PGSs, 746 CpGs, and 90 metabolites. The predictive accuracy for these models in the test (N = 277, cases = 42%) and independent clinical data (N = 142, cases = 45%) ranged from 43 to 57%. We observed strong connections between DNA methylation, amino acids, and parental non-transmitted PGSs for ADHD, Autism Spectrum Disorder, intelligence, smoking initiation, and self-reported health. Aggression-related omics traits link to known and novel risk factors, including inflammation, carcinogens, and smoking.
Subject(s)
Autism Spectrum Disorder , Multiomics , Humans , Cognition , Biomarkers , AggressionABSTRACT
This is the first study to test the psychometric properties of the self-report version of the Proposed Specifiers for Conduct Disorder (PSCD) in detained youth. The PSCD is a measure of the broad psychopathy construct, with grandiose-manipulative, callous-unemotional, daring-impulsive, and conduct disorder (CD) components. Participants (227 males) completed the PSCD along with other measures, including a diagnostic interview to assess Diagnostic and Statistical Manual of Mental Disorders (5th ed.; DSM-5) CD. Results support the PSCD's proposed hierarchical four-factor structure. Correlations with an alternate measure of psychopathy and symptoms of CD support the convergent validity of PSCD scores. PSCD scores showed positive associations with criterion variables of emotional and regulatory functioning, aggression, substance use, and school problems. Finally, PSCD scores were unrelated to anxiety and depression, supporting the PSCD's discriminant validity. Findings indicate that the PSCD is a promising measure for assessing psychopathic traits in detained male adolescents, though its incremental validity is in need of further scrutiny.
Subject(s)
Conduct Disorder , Humans , Male , Adolescent , Conduct Disorder/diagnosis , Conduct Disorder/psychology , Self Report , Belgium , Antisocial Personality Disorder/diagnosis , Antisocial Personality Disorder/psychology , AggressionABSTRACT
This study investigated whether drug dealing juvenile offenders in Belgium differ from non-drug dealers in levels of violent and non-violent offending behaviors, aggression, substance use, and mental health needs. The current study examined data from 226 16- to 17-year-old male juvenile offenders. Information relating to drug dealing, substance use, and mental health needs were collected through self-report questionnaires. A structured diagnostic interview was used to collect information about past violent and non-violent behaviors. Chi-square tests and multivariate analysis of variance compared non-dealers and dealers and explored if hard-drug dealers and soft-drug dealers differed from each other. Relative to non-drug dealers, drug dealers engaged in more violent offending behaviors, exhibited higher levels of aggression, substance use and oppositional defiant problems, and displayed lower levels of anxiety. Soft- and hard-drug dealers did not differ from each other. To conclude, detained drug dealers are characterized by severe antisocial behavior.
Subject(s)
Criminals , Juvenile Delinquency , Substance-Related Disorders , Humans , Male , Adolescent , Criminals/psychology , Belgium/epidemiology , Mental Health , Jails , Violence , Aggression , Substance-Related Disorders/epidemiology , Juvenile Delinquency/psychologyABSTRACT
To maximize the benefits of prevention and treatment efforts the psychopathy construct has been extended downward in age. Despite advances in the study of psychopathy in adolescence it remains unknown if adolescents with psychopathic traits engage in treatment. To fill this knowledge gap, the relationship between psychopathy and treatment engagement was scrutinized in 261 criminal justice-involved male adolescents (ages 16-17 years). Psychopathic traits were measured by means of a well-established self-report questionnaire (Youth Psychopathic traits Inventory; YPI), whereas treatment engagement was measured using a self-report questionnaire consisting of readiness to change, bond with staff, collaboration on goals/tasks, and therapeutic engagement dimensions. Network analysis was used to detect the most robust relations between ten YPI subscales or the three YPI components and the four treatment engagement dimensions. Findings indicated that the YPI subscales (e.g., remorselessness) rather than the YPI components (e.g., callous-unemotional) might help to understand the complex relationship between psychopathic traits and treatment engagement. Disaggregating all the dimensions across its subscales can help us to identify which specific feature of psychopathy is related to treatment engagement and should be the first focus of intervention.
Subject(s)
Antisocial Personality Disorder , Criminal Law , Adolescent , Humans , Male , Personality Inventory , Cross-Sectional Studies , Antisocial Personality Disorder/epidemiology , Surveys and QuestionnairesABSTRACT
Dvoskin et al. (2022) offered a cautionary comment on an article published in the Journal of Personality Disorders (López-Romero et al., 2021). This comment was focused on the scientific and policy grounds of our study, and cautioned against the use of the "putative psychopathic personality" label for applied purposes. While we agree with most of their concerns and cautions, we aim to provide additional clarification on the raised concerns, noting that the purpose of our study is purely exploratory, and that its findings are not intended for applied purposes. We do expect that our study and this commentary will further clarify the importance of examining psychopathic personality from a developmental perspective, opening new ways of discussion regarding how to best conceptualize and study a construct that, while waiting for additional longitudinal research, has been shown as relevant in identifying a group of children and adolescents at increased risk for maladjustment.
Subject(s)
Antisocial Personality Disorder , Personality Disorders , Adolescent , Child , Child, Preschool , HumansABSTRACT
Despite growing interest in strength-based rehabilitation frameworks, relevant internal/external resources that are likely to facilitate the rehabilitation of detained female adolescents (DFA) have been understudied. This study aims to fill this gap by studying the role of young women's personal resilience and interpersonal support in building fulfilling and prosocial lives 4 years after youth detention, thereby examining the strength-based good lives model (GLM). Forty-nine former DFA (Mage = 20.75) completed questionnaires about resilience, support, Quality of Life (QoL), and offending. Hierarchical multiple regression analyses showed that young women with more resilience displayed higher QoL and less offending, while more support was associated with higher QoL only. The relationship between resilience and QoL/offending did not depend upon the level of support. Overall, our results support the applicability of the GLM to former DFA, showing evidence for the importance of both internal and external resources in building fulfilling and prosocial lives.
Subject(s)
Quality of Life , Resilience, Psychological , Adolescent , Adult , Female , Humans , Social Support , Surveys and Questionnaires , Young AdultABSTRACT
Detained female adolescents constitute a vulnerable, challenging, and understudied minority. Interventions for DFA are still dominated by risk management approaches with less focus on strength-based approaches such as the Good Lives Model (GLM). This study explored the functionality of DFA's behaviour prior to and four years after release from detention, using the GLM as the guiding theoretical framework. A theory-driven thematic analysis was conducted of 30 in-depth interviews with former DFA (Mage = 20.80), exploring the fulfilment of their basic human needs (e.g., relatedness, independence) before and after detention. Before detention, the young women experienced multiple problems trying to fulfil multiple human needs, often contributing to poor balance in their lives and their antisocial behaviour. Although external and internal obstacles to fulfilling human needs were still present at follow-up, important improvements were noted, e.g., in the scope of their human needs and the resources available to fulfil their needs. The findings provide additional insights into the issues experienced by young women in detention and indicate there are opportunities to assist these young women, through the development of appropriate resources and capacities which provide them with appropriate means for fulfilling their needs and moving towards a personally meaningful and prosocial life.
Subject(s)
Prisoners , Qualitative Research , Adolescent , Adult , Female , Humans , Young AdultABSTRACT
The self-report version of the Antisocial Process Screening Device (APSD) is a commonly used tool for assessing psychopathic traits in youth. This is the first study designed to examine the factor structure, internal consistency, and convergent validity of the Persian APSD-SR in a sample of 675 school-attending youth in Iran (46% girls; M age = 16.35). Confirmatory factor analysis supported a modified three-factor model, with items loading on narcissism, callous-unemotional, and impulsivity dimensions, which was invariant across gender. Notwithstanding that the internal consistency of some APSD scores was unsatisfactory, the APSD total and dimension scores showed the expected relations with external correlates (e.g., conduct problems, aggression, and low prosocial behavior), supporting the validity of the interpretation of the APSD scores. The findings showed that the APSD is a useful tool for assessing psychopathic traits in Iranian adolescents and may spark research on adolescent psychopathy in mental health and forensic settings.
ABSTRACT
The idea that very young children can manifest a constellation of personality traits that looks like psychopathy has rarely been explored. To fill this void, data from 2,247 children, aged 3-6 years (M = 4.25; SD = 0.91), from the Estudio Longitudinal para una Infancia Saludable (ELISA) were utilized. Parents and teachers completed questionnaires at baseline and at 1-year follow-up. Using three parent-rated psychopathy dimensions as indicators, the authors conducted latent profile analysis and arrived at five latent classes: Control (39.2%), Impulsive-Need for Stimulation (34.8%), Grandiose-Deceitful (16.5%), Callous-Unemotional (6.2%), and Putative Psychopathic Personality (PP, 3.3%). Children in the PP class, overall, engaged in higher levels of concurrent, future, and stable conduct problems and reactive and proactive aggression, and lower levels of prosocial behavior, as rated by parents or teachers. Findings also revealed meaningful differences between the remaining four classes. Person-oriented analyses seem to offer a fruitful avenue to identify 3-to 6-year-olds who exhibit a putative psychopathic personality and are at risk for future maladjustment.
Subject(s)
Conduct Disorder , Problem Behavior , Aggression , Antisocial Personality Disorder/diagnosis , Child , Child, Preschool , Conduct Disorder/diagnosis , Humans , Impulsive Behavior , Surveys and QuestionnairesABSTRACT
DNA methylation profiles of aggressive behavior may capture lifetime cumulative effects of genetic, stochastic, and environmental influences associated with aggression. Here, we report the first large meta-analysis of epigenome-wide association studies (EWAS) of aggressive behavior (N = 15,324 participants). In peripheral blood samples of 14,434 participants from 18 cohorts with mean ages ranging from 7 to 68 years, 13 methylation sites were significantly associated with aggression (alpha = 1.2 × 10-7; Bonferroni correction). In cord blood samples of 2425 children from five cohorts with aggression assessed at mean ages ranging from 4 to 7 years, 83% of these sites showed the same direction of association with childhood aggression (r = 0.74, p = 0.006) but no epigenome-wide significant sites were found. Top-sites (48 at a false discovery rate of 5% in the peripheral blood meta-analysis or in a combined meta-analysis of peripheral blood and cord blood) have been associated with chemical exposures, smoking, cognition, metabolic traits, and genetic variation (mQTLs). Three genes whose expression levels were associated with top-sites were previously linked to schizophrenia and general risk tolerance. At six CpGs, DNA methylation variation in blood mirrors variation in the brain. On average 44% (range = 3-82%) of the aggression-methylation association was explained by current and former smoking and BMI. These findings point at loci that are sensitive to chemical exposures with potential implications for neuronal functions. We hope these results to be a starting point for studies leading to applications as peripheral biomarkers and to reveal causal relationships with aggression and related traits.
Subject(s)
DNA Methylation , Epigenome , Adolescent , Adult , Aged , Aggression , Child , Child, Preschool , CpG Islands/genetics , DNA Methylation/genetics , Epigenesis, Genetic/genetics , Genome-Wide Association Study , Humans , Longevity , Middle Aged , Young AdultABSTRACT
BACKGROUND: Reflecting evidence on Callous-Unemotional (CU) traits (e.g., lack of empathy and guilt, shallow affect), the DSM-5 added a categorical CU-based specifier for Conduct Disorder (CD), labeled 'with Limited Prosocial Emotions' (LPE). Theory and prior work suggest that CD youths with and without LPE will likely differ in neural processing of negative socioemotional content. This proposition, however, is mainly derived from studies employing related, yet distinct, operationalizations of CU traits (e.g., dimensional measure/median split/top quartile), thus precluding direct examination of LPE-specific neurocognitive deficits. METHODS: Employing a DSM-5 informed LPE proxy, neural processing of recognizing and resonating negative socioemotional content (angry and fearful faces) was therefore examined here among CD offenders with LPE (CD/LPE+; N = 19), relative to CD offenders without LPE (CD/LPE-; N = 31) and healthy controls (HC; N = 31). RESULTS: Relative to HC and CD/LPE- youths and according to a linearly increasing trend (CD/LPE- < HC < CD/LPE+), CD/LPE+ youths exhibited hyperactivity within dorsolateral, dorsomedial, and ventromedial prefrontal regions during both emotion recognition and resonance. During emotion resonance, CD/LPE+ youths additionally showed increased activity within the posterior cingulate and precuneal cortices in comparison to HC and CD/LPE- youths, which again followed a linearly increasing trend (CD/LPE- < HC < CD/LPE+). These effects moreover seemed specific to the LPE specifier, when compared to a commonly employed method for CU-based grouping in CD (i.e., median split on CU scores). CONCLUSIONS: These data cautiously suggest that CD/LPE+ youths may exhibit an over-reliance on cortical neurocognitive systems when explicitly processing negative socioemotional information, which could have adverse downstream effects on relevant socioemotional functions. The findings thus seem to provide novel, yet preliminary, clues on the neurocognitive profile of CD/LPE+, and additionally highlight the potential scientific utility of the LPE specifier.
Subject(s)
Brain/diagnostic imaging , Conduct Disorder/diagnostic imaging , Criminals , Emotions/physiology , Adolescent , Conduct Disorder/psychology , Empathy/physiology , Fear/psychology , Humans , Magnetic Resonance Imaging , MaleABSTRACT
OBJECTIVE: A limited prosocial emotions (LPE) subtype of conduct disorder (CD) has been added to the DSM-5. Empirical studies on this categorically defined subtype are scarce, and existing work is predominantly cross-sectional. Hypotheses surrounding the LPE subtype that relate to comorbidity, prognosis, and developmental antecedents, and overlap with psychopathic personality, have received no or little scrutiny. METHOD: These knowledge gaps were addressed in a community sample of 1,839 children 8 to 10 years of age who were enrolled in the study in early childhood (age 3-5 years) and were followed up in early adolescence (age 11-13 years). Parents and teachers completed questionnaires that tap theoretically and clinically relevant features. RESULTS: Children with the LPE subtype exhibited more CD symptoms and comorbid problems, including fearlessness, and symptoms of oppositional defiant disorder and attention-deficit/hyperactivity disorder. These children were also at higher risk for future CD symptoms at the 3-year follow-up. Additionally, fearlessness, callous-unemotional traits, interpersonal traits, and harsh parenting assessed in early childhood were identified as developmental antecedents of the LPE subtype. Findings tentatively suggest that the LPE subtype is a heterogeneous group differentiated on other psychopathic personality traits. CONCLUSION: The LPE subtype appears to identify a troubled, etiologically distinct group of children with conduct problems who are at heightened risk for future maladjustment. Findings can inform the underlying mechanisms related to the LPE subtype, and can lead to the development and improvement of prevention and intervention programs for children with conduct problems.