Antisocial Youth Research Articles

Low Maternal Warmth Mediates the Relationship Between Emotional Neglect and Callous-Unemotional Traits Among Male Juvenile Offenders

Callous-unemotional traits (CU) are thought to be the developmental precursor to adult psychopathy, and identify antisocial youth at risk for persistent, aggressive conduct problems. Accumulating research supports the importance of parenting factors in the development of CU traits. The overlapping but distinct constructs, parental neglect and low warmth, are both associated with CU/psychopathic traits; however, research is yet to examine the relative contribution of these constructs. The purpose of the present study was to examine the unique contributions of parental neglect and low warmth to CU traits among 227 incarcerated male juvenile offenders (M = 15.73, SD = 1.27 years). Results indicated that low levels of maternal warmth were more strongly associated with CU traits than emotional and physical neglect. Maternal warmth also significantly mediated the association between emotional neglect and CU traits. Findings from this cross-sectional study suggest that parental neglect influences CU traits at least partly through experiences with unresponsive and emotionally “cold” parenting. The findings also support a movement within the field towards addressing parental warmth as a treatment target for antisocial youth with CU traits.

The sociological imagination revisited: lessons from America’s Safest City

In America’s Safest City, Simon Singer embraces the sociological imagination to situate juveniles’ personal troubles within the context of middle-class affluence and modernity. In so doing, he departs from the standard research paradigm that seeks to explain delinquency by using secondary data sets that contain limited measures of theoretical constructs identified by reigning perspectives. Singer’s decision has resulted in a rich analysis that is replete with criminological lessons about the nature of delinquency. Four such lessons are presented here, which include: (1) a lower-class bias has clouded thinking about crime; (2) the reaction to crime differs across classes; (3) parents matter in producing adolescence-limited antisocial youths; and (4) suburban delinquency may be a precursor to white-collar crime.

Aggressive Male Juvenile Offenders with Callous-Unemotional Traits Show Aberrant Attentional Orienting to Distress Cues.

Antisocial youth with callous-unemotional (CU) traits exhibit a pattern of severe and persistent conduct problems and deficits in emotional processing that parallels adults with psychopathy. Aberrant emotional attention, particularly among individuals high on aggression, constitutes one such deficit; however, its robustness across race/ethnicity requires further investigation given findings that the psychopathy construct manifests differently across race (Sullivan and Kosson 2006), and emotional attention is susceptible to the influence of adverse environmental factors such as violence exposure that is more common among ethnic minority youth (Kimonis et al. in Development and Psychopathology, 20, 569-589, 2008b). Also, the development of a comprehensive measure of CU traits, the Inventory of Callous-Unemotional Traits (ICU), has identified specific CU dimensions (Uncaring, Callous, Unemotional) that are yet to be investigated in relation to emotional attention deficits. Thus, the purpose of the present study was to examine whether aggressive boys high on total CU traits and specific ICU dimensions show deficits in attentional orienting to negative stimuli on a dot-probe task that are consistent across race/ethnicity. Results from a predominately Latino sample of incarcerated male adolescents (N=156) showed that aggression moderated the association between CU traits and facilitation to distress stimuli. That is, aggressive boys high on CU traits or the Uncaring dimension showed deficient attentional orienting; a finding that was consistent across racial/ethnic minority groups. Results are consistent with prior research suggesting that the combination of high CU traits and aggression defines a unique subgroup of antisocial individuals that more closely fits with the construct of psychopathy than the presence of CU traits alone.

Gender Differences in the Influence of Parenting on Youth Antisocial Behavior through Deviant Peers.

The aim of this study was to assess gender differences in direct and indirect effects of parental knowledge, family support, family conflict, and deviant peers on violent and nonviolent antisocial behavior among youngsters. The total sample was composed of 584 young people, 274 males and 310 females, aged 14 to 20 from High Schools of Galicia (NW Spain). The variables were assessed with different scales of the protocol Valoración del Riesgo en Adolescentes Infractores [Juvenile Offender's Risk Assessment]. Several structural equation models were conducted to clarify the relationships between these variables for males and females. The results showed a better fit for the mediated model. Significant direct effects were found for parental knowledge (β = -.35, p < .01, males; β = -.16, p < .05, females) and parental support (β = .26, p < .05, males) on nonviolent behavior. Significant direct effects were also found for parental knowledge (β = -.36, p < .05, males; β = -.42, p < .05, females) and parental support (β = .32, p < .05, males; β = .24, p < .05, females) on violent behavior. Not significant direct effects were found for family conflict. Moreover, significant indirect effects through deviant peers were found for knowledge (β = -.23, p < .01, males; β = -.21, p < .01, females), support (β = .20, p < .05, males; β = .21, p < .05, females), and conflict (β = .28, p < .01, males; β = .26, p < .05, females) on nonviolent behavior, as well as for knowledge (β = -.20, p < .01, males; β = -.10, p < .01, females), support (β = .18, p < .01, males; β = .10, p < .01, females), and conflict (β = .24, p < .05, males; β = .12, p < .01, females) on violent behavior. Thus, significant gender differences were found, specifically in the direct effects of family support on nonviolent antisocial behavior. The implications of these results for prevention of antisocial behaviors in youth based on gender differences are discussed.

Two Faces of Parental Support: Risk and Protection for Antisocial Youth Depending on Parental Knowledge

Research has suggested that warm and supportive relationships are indispensable to facilitate parent-child communication which, in turn, enables parental knowledge. Thus, the aim of this study was to analyse the direct and indirect effects of parental support and parental knowledge on juvenile antisocial behaviours (i.e., substance abuse, nonviolent antisocial behaviour, and violent behaviour) taking into account gender differences. The sample was composed of 876 Spanish young people: 584 from the community aged 14 to 19, 46.9 % males, and 292 from juvenile centres aged 14 to 22, 91.1 % males. Several scales from the protocol of Valoracion del Riesgo en Adolescentes Infractores [Juvenile Offender’s Risk Assessment] were used to measure the variables. Results of structural equation modelling indicate that parental knowledge is significantly and negatively related to the antisocial behaviours in both community and institutionalized subsamples both in males and females. On the other hand, although the parental support appears to show positive or not significant direct effects on antisocial behaviours, results indicate the existence of significant and strong mediation effects through parental knowledge. Thus, parental support is significantly and negatively related to all antisocial behaviours, in both subsamples and in both gender, only through the increasing of parental knowledge. These findings seem to suggest that high levels of parental support may only be effective to reduce juvenile antisocial behaviours through increasing levels of parental knowledge.

How Do Family-Focused Prevention Programs Work? A Review of Mediating Mechanisms Associated with Reductions in Youth Antisocial Behaviors.

The development and evaluation of family-focused preventive interventions has grown significantly in recent decades, but the degree to which these interventions produce anticipated improvements in the family environment, and the extent to which such changes are associated with reductions in youth antisocial behaviors (ASB), is unclear. This article seeks to answer these questions by reviewing evidence from tests of mediation conducted in evaluations of family-focused interventions. Interventions are drawn from family-focused interventions rated as Model Plus, Model, or Promising on the Blueprints for Healthy Youth Development Web site ( http://www.colorado.edu/cspv/blueprints/ ) based on evidence of their effectiveness in reducing child externalizing behaviors, substance use, and/or delinquency. Of the 19 such interventions listed on Blueprints, seven programs (37%) were evaluated using mediation analyses which met study criteria. Two-thirds (67%) of these analyses indicated significant improvements in the targeted family processes for intervention versus control group participants. Over half (62%) of all tests of mediation were statistically significant and indicated that improvements in the family environment were associated with reductions in ASB. The results support prior theoretical and empirical literature identifying the family as an important context for preventing ASB and promoting healthy youth development. The findings also provide information that can be used to refine current family-focused interventions in order to increase their efficiency and potency, and to develop new interventions in order to expand the number and types of families who can benefit from such services.

The clinical usefulness of the DSM-5 specifier for conduct disorder outside of a research context.

The Diagnostic and Statistical Manual of Mental Disorders, fifth edition (DSM-5) specifier 'with Limited Prosocial Emotions' (LPE) is expected to provide information about impairment of adolescents with conduct disorder (CD) and to designate a severe subgroup of antisocial youths. This study is the first to scrutinize the clinical usefulness of this LPE specifier outside of a research context. Standardized questionnaires and diagnostic interviews were administered to 380 detained boys as part of a clinical protocol. Boys with CD that met criteria for the LPE specifier did not significantly differ from CD boys without LPE on any of the variables of interest. When using a CD diagnosis by itself (that is, without linking it to the LPE specifier) boys with CD were significantly more psychiatrically disturbed, rule-breaking, reactively and proactively aggressive, and reported more violent and nonviolent offenses than boys without CD. These differences were also revealed while using the LPE specifier by itself (that is, without linking it to a CD diagnosis). Additional analyses, nevertheless, showed that the magnitude of the group differences was strong when using a CD diagnosis by itself, but weak to moderate when using the LPE specifier by itself, or when incorporating the LPE specifier into a diagnosis of CD as recommended by the DSM-5. Altogether, this study suggests that incorporating the LPE specifier into CD is of restricted usefulness to discriminate between detained boys with varying levels of psychiatric problems and antisocial behavior. Interestingly, a CD diagnosis by itself seems the most clinically useful measure to identify a troubled group of detained boys. (PsycINFO Database Record

Social Conduct Scale (SCS): a psychometric investigation

The social conduct of an individual comprises all the interpersonal behaviors that he or she exhibits in the social contexts he or she is exposed to. The Social Conduct Scale (SCS) is a self-report instrument developed to provide researchers and clinicians with information on prosocial, antisocial and oppositional-defiant tendencies of Portuguese-speaking children and adolescents. In the present study, we conducted an analysis of the criterion validity of the SCS by comparing the scores obtained from a large population-based sample (N = 1,172) against an offender (N = 129), a scholar (N = 31), and a clinic-referred (N = 24) sample of adolescents with marked previous conduct problems. As expected, antisocial youths had significantly higher means on antisocial behaviors and lower means on prosocial tendencies when compared to the population-based sample. Overall, findings supported the hypothesized criterion validity of the SCS. The instrument might play a role as a helpful resource for researchers, clinicians and practitioners interested in assessing the social conduct of Brazilian children and adolescents.

Language impairments among youth offenders: A systematic review

Low levels of verbal intelligence have long been associated with risk for early onset antisocial behavior, however considerably less is known about the deficits in specific language skills that may characterize antisocial youth. Youth offenders represent a particularly high priority group for research into such deficits, as the juvenile justice system involves a range of high-stakes situations that rely upon the application of language skills. Our aim was to conduct a systematic review of the evidence currently available regarding the discrete language skills of youth offenders, spanning structural, pragmatic, expressive and receptive language domains. Seventeen studies meeting search criteria were identified, 16 of which reported on independent samples. Findings from these studies provide considerable evidence that youth offenders perform poorly on language measures relative to age matched peers. Study results are examined in relation to three key questions: (1) How strong is the association between language impairments and youth offending? (2) Are some language skills or modalities more impaired than others in youth offender populations; and (3) What biopsychosocial factors have been shown to influence the relationship between language impairments and youth offending? Implications for policy and practice are discussed, along with directions for future research.

Limitations of Extending Juvenile Psychopathy Research Assessment Tools and Methods to Forensic Settings

Psychopathic or psychopathic-like characteristics in youths have been studied extensively over the past two decades across community, clinic-referred and adjudicated samples [1-4]. Frick and White [2] asserted that a review of the literature provides “compelling evidence” of an association between psychopathic traits and severe conduct problems, violence, aggression, and delinquency across samples of youths. In more recent years specific dimensions of psychopathy, especially callous-unemotional (CU) traits, which reflect affective features of psychopathy, have become the focus of numerous studies [5]. An accumulation of empirical evidence strongly suggests that youths with high levels of CU traits represent a subgroup of antisocial youth who display more severe and persistent aggression and violence, especially including both instrumental and reactive aggression, and a general lack of empathy and guilt [1-4,6-7]. A recent comprehensive review of the literature by Frick, et al. [4] on the role of CU traits in understanding severe conduct problems included 269 studies published after 1990, 191 of which were published in 2007 or later. The review concluded that the research seems to indicate that “... children and adolescents with severe conduct problems and elevated CU traits show distinct genetic, cognitive, emotional, biological, environmental, and personality characteristics that seem to implicate different etiological factors underlying their behavior problems relative to other youths with severe conduct problems”. Measures of CU traits have shown stability across childhood and adolescence at levels that are comparable to those reported for other problem areas studied in child and adolescent psychopathology [8]; and see Frick, et al. [3] for a review. Still, despite finding moderate stability of psychopathy from early adolescence into young adulthood, Lynam, et al. [8] also found that “most individuals identified as psychopaths at age 13 will not receive such a diagnosis at age 24”. Additionally, decreases in CU traits for some youths, and decreases associated with family based interventions in particular, suggest that such traits are malleable and may be positively altered in association with certain features of the child’s psychosocial environment [2,9].

Patterns of Inhalant Use among Incarcerated Youth.

Inhalant use is especially prevalent among antisocial youth and can have serious health consequences. However, the extant literature has not investigated how use of various inhalants may co-occur among incarcerated youth. This study begins to address this gap in the literature by using latent class analyses to form distinct typologies of inhalant use. Study participants were residents (N = 723) of 27 Missouri Division of Youth Services facilities. Interviews assessed psychiatric symptoms, antisocial traits, delinquency, trauma, suicidality, and substance use behaviors. The mean age of the mostly male, ethnically diverse sample was 15.5 (S.D. = 1.2) years old. The study revealed the following classes of inhalant use: (1) severe polyinhalant use; (2) moderate polyinhalant use; (3) gas and permanent marker use; and (4) low-use. Compared to the low-use class, members of the severe polyinhalant use class had experienced more than double the rate of head injuries, the highest rates of traumatic experiences, and the highest rates of mental illness diagnoses. The gas and markers class had the highest rate of reporting hearing voices, followed by the severe polyinhalant use class, and the moderate polyinhalant use class. Results of this study underscore the need to address the high rate of head injuries and mental health diagnoses that contribute to severe polyinhalant use.

Therapist perception of treatment outcome: Evaluating treatment outcomes among youth with antisocial behavior problems.

Effective evaluation of treatment requires the use of measurement tools producing reliable scores that can be used to make valid decisions about the outcomes of interest. Therapist-rated treatment outcome scores that are obtained within the context of empirically supported treatments (ESTs) could provide clinicians and researchers with data that are easily accessible and complimentary to existing instrumentation. We examined the psychometric properties of scores from the Therapist Perception of Treatment Outcome: Youth Antisocial Behavior (TPTO:YAB), an instrument developed to assess therapist judgments of treatment success among families participating in an EST, Multisystemic Therapy (MST), for youth with antisocial behavior problems. Data were drawn from a longitudinal study of MST. The initial 20-item TPTO:YAB was completed by therapists of 111 families at midtreatment and 163 families at treatment termination. Rasch model dimensionality analyses provided evidence for 2 dimensions reflecting youth- and caregiver-related aspects of treatment outcome, although a bifactor analyses suggested that these dimensions reflected a single more general construct. Rasch analyses were also used to assess item and rating scale characteristics and refine the number of items. These analyses suggested items performed similarly across time and that scores reflect treatment outcome in similar ways at mid and posttreatment. Multilevel and zero-order analyses provided evidence for the validity of TPTO:YAB scores. TPTO:YAB scores were moderately correlated with scores of youth and caregiver behaviors targeted in treatment, adding support to its use as a treatment outcome measurement instrument.

Rumble: Prevalence and Correlates of Group Fighting among Adolescents in the United States.

Objective. Group fighting is portrayed as a piece of Americana among delinquent youth, but the behavior produces significant multifaceted negative consequences. The current study examines the heterogeneity and correlates of group fighting using national-level data. Method. Employing data from the National Survey on Drug Use and Health between 2002 and 2013 (n = 216,852), we examine links between group fighting and temperamental, parental, and academic factors as well as other externalizing behaviors (i.e., violence, crime, substance use). Results. The prevalence of group fighting in the United States is 14.8% with 11.33% reporting 1–2 group fights and 3.46% reporting 3+ group fights. A clear severity gradient in school functioning and academic performance, sensation seeking, parental disengagement, violence and delinquency, and substance use disorders is seen in the normative, episodic, and repeat offender groups. Conclusions. Youths who participate in 3+ group fights display the exceptionality and severity of other serious/chronic/habitual antisocial youth which suggests that group fighting should be considered a significant indicator of developing criminality.

Is multidimensional treatment foster care (MTFC) more effective than treatment as usual in a three-year follow-up? Results from MTFC in a Swedish setting

This study examines three-year post-baseline outcomes for a randomized controlled trial of Swedish antisocial youths who received either multidimensional treatment foster care (MTFC) or treatment as usual (TAU). Several studies in our literature review indicated that MTFC intervention is preferred to the alternative (TAU) in the USA during follow-up. Two studies (one conducted in the UK and one in Sweden) have shown indications of a washout effect between the intervention alternatives during follow-up. However, this study showed few but positive significant outcomes at follow-up for the MTFC programme in comparison to TAU. Juveniles who participated in MTFC spent fewer days in locked settings and had committed fewer violent crimes, according to the social case records. Two key features of the MTFC programme certainly merit use in general social service—namely, reducing exposure to deviant peers and increasing school participation.

Childhood- versus adolescent-onset antisocial youth with conduct disorder: psychiatric illness, neuropsychological and psychosocial function.

ObjectiveThe present study investigates whether youths with childhood-onset antisocial behavior have higher rates of psychiatric illness, neuropsychological and psychosocial dysfunction than youths who engage in antisocial behavior for the first time in adolescence. Prior studies have generally focused on single domains of function in heterogeneous samples. The present study also examined the extent to which adolescent-onset antisocial behavior can be considered normative, an assumption of Moffitt’s dual taxonomy model.MethodForty-three subjects (34 males, 9 females, mean age = 15.31, age range 12–21) with a diagnosis of conduct disorder (CD) were recruited through Headspace Services and the Juvenile Justice Community Centre. We compared childhood-onset antisocial youths (n = 23) with adolescent-onset antisocial youths (n = 20) with a conduct disorder, across a battery of psychiatric, neuropsychological and psychosocial measures. Neuropsychological function of both groups was also compared with normative scores from control samples.ResultsThe childhood-onset group displayed deficits in verbal learning and memory, higher rates of psychosis, childhood maltreatment and more serious violent behavior, all effects associated with a large effect size. Both groups had impaired executive function, falling within the extremely low range (severely impaired).ConclusionsChildhood-onset CD displayed greater cognitive impairment, more psychiatric symptoms and committed more serious violent offences. The finding of severe executive impairment in both childhood- and adolescent-onset groupings challenges the assumption that adolescent-onset antisocial behavior is a normative process.

Alpha-amylase reactivity in relation to psychopathic traits in adults

Recent investigations of the psychobiology of stress in antisocial youth have benefited from a multi-system measurement model. The inclusion of salivary alpha-amylase (sAA), a surrogate marker of autonomic/sympathetic nervous system (ANS) activity, in addition to salivary cortisol, a biomarker of the hypothalamic-pituitary-adrenal (HPA) axis functioning, has helped define a more complete picture of individual differences and potential dysfunction in the stress response system of these individuals. To the authors' knowledge, no studies have examined sAA in relation to antisocial behavior in adults or in relation to psychopathic traits specifically. In the present study, we examined sAA, in addition to salivary cortisol, in a relatively large sample (n=158) of adult males (M age=36.81, range=22-67 years; 44% African-American, 34% Caucasian, 16% Hispanic) recruited from temporary employment agencies with varying levels of psychopathic traits. Males scoring highest in psychopathy were found to have attenuated sAA reactivity to social stress compared to those scoring lower in psychopathy. No differential relationships with the different factors of psychopathy were observed. In contrast to studies of antisocial youth, there were no interactions between sAA and cortisol levels in relation to psychopathy, but there was a significant interaction between pre-stressor levels of sAA and cortisol. Findings reveal potential regulatory deficits in the fast-acting, 'fight or flight', component of the stress response in adult males with psychopathic traits, as well as abnormalities in how this system may interact with the HPA axis.

Evidence-based preventive intervention for preadolescent aggressive children: One-year outcomes following randomization to group versus individual delivery.

Some research suggests that group interventions with antisocial youth may, on occasion, have iatrogenic effects. This is the first study to test the effects of group versus individual delivery of evidence-based intervention for aggressive children. Three hundred sixty fourth-grade children were randomly assigned by school to group coping power (GCP) or individual coping power (ICP). Longitudinal assessments of teacher and parent reports of behavior (Behavior Assessment System for Children [BASC]; Peer Affiliation and Social Acceptance [PASA]) were collected from baseline through a 1-year follow-up. Growth curve analyses revealed that children in both conditions reduced teacher- and parent-reported externalizing behavior problems and internalizing behavior problems by the end of the 1-year follow-up. However, the degree of improvement in teacher-reported outcomes was significantly greater for children receiving an individual version of the program. In addition, children's baseline level of inhibitory control moderated intervention effects, showing children with low initial levels of inhibitory control to respond poorly in teacher-rated outcomes to group interventions compared to those delivered individually. This study suggests overall benefits to children for either group or individual delivery of the Coping Power program under high-fidelity conditions; however, for children with low levels of initial self-regulation, individualized interventions will likely yield the most significant reduction in externalizing behavior in the school setting in preadolescence.

Assessment of the Affective Dimensions of Psychopathy with the Danish version of the Inventory of Callous-Unemotional Traits among Incarcerated Boys: A study of Reliability, Criterion Validity, and Construct Validity

Abstract Background: Callous-unemotional (CU) traits have been found to index an important subgroup of antisocial youth who are at high risk for developing psychopathic personality pathology, and for becoming severe and persistent offenders. On the basis of such research findings, the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, have included a “with limited prosocial emotions” specifier in the diagnostic criteria for conduct disorder to designate a subtype with high levels of CU traits. This creates the need for psychometrically sound measures for the assessment of these traits. The self-report questionnaire Inventory of Callous-Unemotional Traits (ICU) was designed to provide an efficient, reliable, and valid measure of CU traits among youth populations. Method: Eighty Danish adolescent boys between the ages of 15 to 18 years in secure institutions were assessed concurrently with the ICU, the Psychopathy Checklist: Youth Version (PCL:YV), self-report measures of aggression and empathy, and ratings of psychosocial problems. Approximately nine days later, the ICU was readministered in a subset of the sample (n = 40) to examine test-retest reliability. Results: Internal consistency was satisfactory, and test-retest reliability was excellent. Concurrent validity associations with the PCL:YV ranged from moderate to high. The ICU displayed excellent discriminative validity for identifying persons who displayed high levels of psychopathic traits. CU traits were also found to be associated with psychosocial impairments, aggression, and reduced empathy. Conclusions: Overall, these findings support the reliability; construct validity, and criterion validity of the ICU.

Using self-reported callous-unemotional traits to cross-nationally assess the DSM-5 'With Limited Prosocial Emotions' specifier.

The presence of callous-unemotional (CU) traits designates an important subgroup of antisocial youth at risk for severe, persistent, and impairing conduct problems. As a result, the fifth revision of the Diagnostic and Statistical Manual includes a specifier for youth meeting diagnostic criteria for Conduct Disorder who show elevated CU traits. The current study evaluated the DSM-5 criteria using Item Response Theory (IRT) analyses and evaluated two methods for using a self-report measure of CU traits to make this diagnosis. The sample included 2257 adolescent (M age = 15.64, SD = 1.69 years) boys (53%) and girls (47%) from community and incarcerated settings in the United States and the European countries of Belgium, Germany, and Cyprus. IRT analyses suggested that four- or eight-item sets from the self-report measure (comparable to the symptoms used by the DSM-5 specifier) provided good model fit, suggesting that they assess a single underlying CU construct. Further, the most stringent method of scoring the self-report scale (i.e. taking only the most extreme responses) to approximate symptom presence provided the best discrimination in IRT analyses, showed reasonable prevalence rates of the specifier, and designated community adolescents who were highly antisocial, whereas the less stringent method best discriminated detained youth. Refined self-report scales developed on the basis of IRT findings provided good assessments of most of the symptoms used in the DSM-5 criteria. These scales may be used as one component of a multimethod assessment of the 'With Limited Prosocial Emotions' specifier for Conduct Disorder.

Assessing Callous-Unemotional Traits in a Spanish Sample of Institutionalized Youths: The Inventory of Callous-Unemotional Traits

Callous and unemotional traits (CU), considered as the hallmark of the construct of psychopathy, have shown their relevance in designating a specific subgroup of youths with a distinctive pattern of severe conduct problems and antisocial behavior. In order to improve the existing measures, the Inventory of Callous Unemotional traits (ICU) was developed to provide a reliable and valid measure of CU traits in youth populations. The present study aims to validate the Spanish self-reported version of the ICU in a sample of 324 institutionalized youths. Firstly, the factor structure of the ICU was tested in order to identify distinctive dimensions of CU traits. Secondly, the association of the ICU with other measures of personality and psychopathic traits, as well as with a set of external behavioral and psychosocial variables, was examined. Finally, the usefulness of CU traits measured through the ICU to designate a distinctive subgroup of antisocial youths was also investigated. After some scale refinement, results confirm the validity of the ICU as a reliable and efficient measure of CU traits in youth samples, provide some evidence as regards the dimensionality of the construct, and support its relevance in identifying a specific subgroup of youths showing a pattern of serious behavioral and psychosocial disadjustment.