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International Journal of Mental Health and Addiction

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01-06-2020 | Original Article

Adolescent Cannabis Use and Conduct Problems: the Mediating Influence of Callous-Unemotional Traits

Authors: Samuel W. Hawes, Ileana Pacheco-Colón, J. Megan Ross, Raul Gonzalez

Published in: International Journal of Mental Health and Addiction | Issue 3/2020

Abstract

Cannabis use has been linked to an increased risk of engaging in conduct problem behaviors. However, little existing research has considered intervening processes and shared risk factors that may contribute to this association. The current investigation examines whether callous-unemotional traits, which have shown associations with adolescent cannabis use and conduct problem development, may exhibit a mediating influence on this relationship. Using a longitudinal cohort of youth (n = 390) at increased risk for escalating in their use of cannabis, we found that baseline cannabis use (age ~ 15) was associated with higher levels of trait-like conduct problems (ages ~ 16 and 17), even after controlling for important autoregressive and cross-lagged effects, along with a number of other shared risk factors (e.g., co-occurring substance use, age, sex). Findings also revealed that callous-unemotional traits partially mediated this relationship, with the hypothesized model accounting for approximately one third of the report [ variance in the conduct problem outcome (R² = .34). These results indicate that callous-unemotional traits may play an important intermediary role in the association between cannabis use and the development of problem behaviors.

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All study analyses were also re-run, excluding study covariates. For this model, all significant effects remained and the overall portion of variance explained in the conduct problem outcome (R² = .34) was similar to that found in the covariate model. The results are provided in Table S1.

Achenbach, T. M. (1991). Manual for the youth self-report and 1991 profile. Burlington: University of Vermont, Department of Psychiatry.

Ansell, E. B., Laws, H. B., Roche, M. J., & Sinha, R. (2015). Effects of marijuana use on impulsivity and hostility in daily life. Drug and Alcohol Dependence, 148, 136–142.PubMedCrossRef

Bechtold, J., Simpson, T., White, H. R., & Pardini, D. (2015). Chronic adolescent marijuana use as a risk factor for physical and mental health problems in young adult men. Psychology of Addictive Behaviors, 29(3), 552–563.PubMedPubMedCentralCrossRef

Bennett, T., Holloway, K., & Farrington, D. (2008). The statistical association between drug misuse and crime: a meta-analysis. Aggression and Violent Behavior, 13(2), 107–118.CrossRef

Bhattacharyya, S., Fusar-Poli, P., Borgwardt, S., Martin-Santos, R., Crippa, J. A., Atakan, Z., et al. (2009). Opposite neural effects of the main psychoactive ingredients of cannabis on the neural substrate for psychosis. Schizophrenia Bulletin, 35, 163–163.CrossRef

Bhattacharyya, S., Morrison, P. D., Fusar-Poli, P., Martin-Santos, R., Borgwardt, S., Winton-Brown, T., et al. (2010). Opposite effects of Δ-9-tetrahydrocannabinol and cannabidiol on human brain function and psychopathology. Neuropsychopharmacology, 35(3), 764–774.PubMedCrossRef

Blair, R. J., Budhani, S., Colledge, E., & Scott, S. (2005). Deafness to fear in boys with psychopathic tendencies. Journal of Child Psychology and Psychiatry, 46(3), 327–336.PubMedCrossRef

Bossong, M. G., van Hell, H. H., Jager, G., Kahn, R. S., Ramsey, N. F., & Jansma, J. M. (2013). The endocannabinoid system and emotional processing: a pharmacological fMRI study with∆ 9-tetrahydrocannabinol. European Neuropsychopharmacology, 23(12), 1687–1697.PubMedCrossRef

Brook, J. S., Zhang, C. S., & Brook, D. W. (2011). Antisocial behavior at age 37: developmental trajectories of marijuana use extending from adolescence to adulthood. American Journal on Addictions, 20(6), 509–515. https://doi.org/10.1111/j.1521-0391.2011.00179.x.CrossRefPubMed

Brook, J. S., Lee, J. Y., Finch, S. J., & Brook, D. W. (2014). Developmental trajectories of marijuana use from adolescence to adulthood: relationship with using weapons including guns. Aggressive Behavior, 40(3), 229–237.PubMedCrossRef

Busemeyer, J. R., & Jones, L. E. (1983). Analysis of multiplicative combination rules when the causal variables are measured with error. Psychological Bulletin, 93(3), 549–562.CrossRef

Byrd, A. L., Kahn, R. E., & Pardini, D. A. (2012a). A validation of the inventory of callous-unemotional traits in a community sample of young adult males. Journal of Psychopathology and Behavioral Assessment, 35, 1–15.

Byrd, A. L., Loeber, R., & Pardini, D. A. (2012b). Understanding desisting and persisting forms of delinquency: the unique contributions of disruptive behavior disorders and interpersonal callousness. Journal of Child Psychology and Psychiatry, 53(4), 371–380. https://doi.org/10.1111/j.1469-7610.2011.02504.x.CrossRefPubMed

Byrd, A. L., Hawes, S. W., Loeber, R., & Pardini, D. A. (2016). Interpersonal callousness from childhood to adolescence: developmental trajectories and early risk factors. Journal of Clinical Child and Adolescent Psychology, 47, 1–16.

Clark, D. B., Thatcher, D. L., & Tapert, S. F. (2008). Alcohol, psychological dysregulation, and adolescent brain development. Alcoholism, Clinical and Experimental Research, 32(3), 375–385. https://doi.org/10.1111/j.1530-0277.2007.00601.x.CrossRefPubMed

Crane, N. A., Schuster, R. M., Fusar-Poli, P., & Gonzalez, R. (2013). Effects of cannabis on neurocognitive functioning: recent advances, neurodevelopmental influences, and sex differences. Neuropsychology Review, 23(2), 117–137.PubMedCrossRef

Dolan, M., & Fullam, R. (2006). Face affect recognition deficits in personality-disordered offenders: association with psychopathy. Psychological Medicine, 36(11), 1563–1569. https://doi.org/10.1017/S0033291706008634.CrossRefPubMed

Elliott, D. S. (2013). Crime prevention and intervention over the life course. In Handbook of life-course criminology (pp. 297-315). New York: Springer.

Enders, C. K., & Bandalos, D. L. (2001). The relative performance of full information maximum likelihood estimation for missing data in structural equation models. Structural Equation Modeling, 8(3), 430–457.CrossRef

Fairchild, G., Stobbe, Y., van Goozen, S. H. M., Calder, A. J., & Goodyer, I. M. (2010). Facial expression recognition, fear conditioning, and startle modulation in female subjects with conduct disorder. Biological Psychiatry, 68(3), 272–279. https://doi.org/10.1016/j.biopsych.2010.02.019.CrossRefPubMedPubMedCentral

Fanti, K. A., Frick, P. J., & Georgiou, S. (2009). Linking callous-unemotional traits to instrumental and non-instrumental forms of aggression. Journal of Psychopathology and Behavioral Assessment, 31(4), 285–298.CrossRef

Finger, E. C., Marsh, A. A., Blair, K. S., Reid, M. E., Sims, C., Ng, P., et al. (2011). Disrupted reinforcement signaling in the orbitofrontal cortex and caudate in youths with conduct disorder or oppositional defiant disorder and a high level of psychopathic traits. American Journal of Psychiatry, 168(2), 152–162. https://doi.org/10.1176/appi.ajp.2010.10010129.CrossRefPubMed

Flory, K., Lynam, D., Milich, R., Leukefeld, C., & Clayton, R. (2004). Early adolescent through young adult alcohol and marijuana use trajectories: early predictors, young adult outcomes, and predictive utility. Development and Psychopathology, 16(1), 193–213.PubMedCrossRef

Fontaine, N. M. G., McCrory, E. J. P., Boivin, M., Moffitt, T. E., & Viding, E. (2011). Predictors and outcomes of joint trajectories of callous–unemotional traits and conduct problems in childhood. Journal of Abnormal Psychology, 120(3), 730–742.PubMedCrossRef

Frick, P. J. (2004). The inventory of callous-unemotional traits. Unpublished rating scale.

Frick, P. J., & Dickens, C. (2006). Current perspectives on conduct disorder. Current Psychiatry Reports, 8(1), 59–72.PubMedCrossRef

Frick, P. J., & Hare, R. D. (2001). Antisocial process screening device technical manual. Toronto: Multi-Health Systems.

Frick, P. J., & White, S. F. (2008). Research review: the importance of callous-unemotional traits for developmental models of aggressive and antisocial behavior. Journal of Child Psychology and Psychiatry, 49(4), 359–375. https://doi.org/10.1111/j.1469-7610.2007.01862.x.CrossRefPubMed

Fusar-Poli, P., Crippa, J. A., Bhattacharyya, S., Borgwardt, S. J., Allen, P., Martin-Santos, R., et al. (2009). Distinct effects of delta 9-tetrahydrocannabinol and cannabidiol on neural activation during emotional processing. Archives of General Psychiatry, 66(1), 95–105.PubMedCrossRef

Gonzalez, R., Schuster, R. M., Mermelstein, R. J., Vassileva, J., Martin, E. M., & Diviak, K. R. (2012). Performance of young adult cannabis users on neurocognitive measures of impulsive behavior and their relationship to symptoms of cannabis use disorders. Journal of Clinical and Experimental Neuropsychology, 34(9), 962–976.PubMedPubMedCentralCrossRef

Gotham, H. J., Sher, K. J., & Wood, P. K. (2003). Alcohol involvement and developmental task completion during young adulthood. Journal of Studies on Alcohol, 64(1), 32–42.PubMedCrossRef

Green, K. M., Doherty, E. E., Stuart, E. A., & Ensminger, M. E. (2010). Does heavy adolescent marijuana use lead to criminal involvement in adulthood? Evidence from a multiwave longitudinal study of urban African Americans. Drug and Alcohol Dependence, 112(1), 117–125.PubMedPubMedCentralCrossRef

Gruber, S. A., Rogowska, J., & Yurgelun-Todd, D. A. (2009). Altered affective response in marijuana smokers: an FMRI study. Drug and Alcohol Dependence, 105(1–2), 139–153. https://doi.org/10.1016/j.drugalcdep.2009.06.019.CrossRefPubMedPubMedCentral

Hawes, S. W., Byrd, A. L., Henderson, C. E., Gazda, R. L., Burke, J. D., Loeber, R., & Pardini, D. A. (2014). Refining the parent-reported inventory of callous–unemotional traits in boys with conduct problems. Psychological Assessment, 26(1), 256–266.PubMedCrossRef

Hawes, S. W., Crane, C. A., Henderson, C. E., Mulvey, E. P., Schubert, C. A., & Pardini, D. A. (2015). Codevelopment of psychopathic features and alcohol use during emerging adulthood: disaggregating between-and within-person change. Journal of Abnormal Psychology, 124(3), 729–739.PubMedPubMedCentralCrossRef

Hawes, S. W., Byrd, A. L., Waller, R., Lynam, D. R., & Pardini, D. A. (2017). Late childhood interpersonal callousness and conduct problem trajectories interact to predict adult psychopathy. Journal of Child Psychology and Psychiatry, 58(1), 55–63.PubMedCrossRef

Herkenham, M., Lynn, A. B., Little, M. D., Johnson, M. R., Melvin, L. S., De Costa, B. R., & Rice, K. C. (1990). Cannabinoid receptor localization in brain. Proceedings of the National Academy of Sciences, 87(5), 1932–1936.CrossRef

Hillege, S., Das, J., & de Ruiter, C. (2010). The Youth Psychopathic traits Inventory: psychometric properties and its relation to substance use and interpersonal style in a Dutch sample of non-referred adolescents. Journal of Adolescence, 33(1), 83–91.PubMedCrossRef

Hindocha, C., Wollenberg, O., Carter Leno, V., Alvarez, B. O., Curran, H. V., & Freeman, T. P. (2014). Emotional processing deficits in chronic cannabis use: a replication and extension. Journal of Psychopharmacology, 28(5), 466–471.PubMedCrossRef

Hodgins, D. C., & Holub, A. (2015). Components of impulsivity in gambling disorder. International Journal of Mental Health and Addiction, 13(6), 699–711.PubMedPubMedCentralCrossRef

Johnston, L. D., O'Malley, P. M., Bachman, J. G., & Schulenberg, J. E. (2011). Monitoring the future national survey results on drug use, 1975–2010. Volume I: secondary school students. Retrieved from Ann Arbor: Institute for Social Research:

Katona, I., Rancz, E. A., Acsady, L., Ledent, C., Mackie, K., Hajos, N., & Freund, T. F. (2001). Distribution of CB1 cannabinoid receptors in the amygdala and their role in the control of GABAergic transmission. Journal of Neuroscience, 21(23), 9506–9518.PubMedCrossRef

Kenny, D. A., & Judd, C. M. (1984). Estimating the nonlinear and interactive effects of latent variables. Psychological Bulletin, 96(1), 201–210.CrossRef

Kimonis, E. R., Frick, P. J., Skeem, J. L., Marsee, M. A., Cruise, K., Munoz, L. C., et al. (2008). Assessing callous-unemotional traits in adolescent offenders: validation of the Inventory of Callous-Unemotional Traits. International Journal of Law and Psychiatry, 31(3), 241–252. https://doi.org/10.1016/j.ijlp.2008.04.002.CrossRefPubMed

Kimonis, E. R., Tatar II, J. R., & Cauffman, E. (2012). Substance-related disorders among juvenile offenders: what role do psychopathic traits play? Psychology of Addictive Behaviors, 26(2), 212–225.PubMedPubMedCentralCrossRef

Lane, S. D., Cherek, D. R., Tcheremissine, O. V., Lieving, L. M., & Pietras, C. J. (2005). Acute marijuana effects on human risk taking. Neuropsychopharmacology, 30(4), 800–809.PubMedCrossRef

Laviolette, S. R., & Grace, A. A. (2006). Cannabinoids potentiate emotional learning plasticity in neurons of the medial prefrontal cortex through basolateral amygdala inputs. The Journal of Neuroscience, 26(24), 6458–6468.PubMedPubMedCentralCrossRef

Little, T. D., Bovaird, J. A., & Widaman, K. F. (2006). On the merits of orthogonalizing powered and product terms: implications for modeling interactions among latent variables. Structural Equation Modeling, 13(4), 497–519.CrossRef

Loeber, R., Farrington, D. P., Stouthamer-Loeber, M., & Van Kammen, W. B. (1998). Multiple risk factors for multiproblem boys: co-occurrence of delinquency, substance use, attention deficit, conduct problems, physical aggression, covert behavior, depressed mood, and shy/withdrawn behavior. In R. Jessor (Ed.),New perspectives on adolescent risk behavior (pp. 90-149). New York, US: Cambridge University Press

Malgady, R. G., Rogler, L. H., & Tryon, W. W. (1992). Issues of validity in the Diagnostic Interview Schedule. Journal of Psychiatric Research, 26(1), 59–67.PubMedCrossRef

Malone, S. M., Taylor, J., Marmorstein, N. R., McGue, M., & Iacono, W. G. (2004). Genetic and environmental influences on antisocial behavior and alcohol dependence from adolescence to early adulthood. Development and Psychopathology, 16(4), 943–966.PubMedCrossRef

Marsh, A. A., & Cardinale, E. M. (2012). When psychopathy impairs moral judgments: neural responses during judgments about causing fear. Social Cognitive and Affective Neuroscience, Advance online publication. https://doi.org/10.1093/scan/nss1097.

Marsh, A. A., Finger, E. C., Mitchell, D. G., Reid, M. E., Sims, C., Kosson, D. S., et al. (2008). Reduced amygdala response to fearful expressions in children and adolescents with callous-unemotional traits and disruptive behavior disorders. American Journal of Psychiatry, 165(6), 712–720. https://doi.org/10.1176/appi.ajp.2007.07071145.CrossRefPubMed

Moffitt, T. E., Caspi, A., Harrington, H., & Milne, B. J. (2002). Males on the life-course-persistent and adolescence-limited antisocial pathways: follow-up at age 26 years. Development and Psychopathology, 14(1), 179–207.PubMedCrossRef

Muthén, B. O., & Asparouhov, T. (2015). Causal effects in mediation modeling: an introduction with applications to latent variables. Structural Equation Modeling: A Multidisciplinary Journal, 22(1), 12–23.CrossRef

Muthén, L. K., & Muthén, B. O. (1998-2012). Mplus user’s guide (Seventh ed.). Los Angeles: Muthén & Muthén.

Norström, T., & Rossow, I. (2014). Cannabis use and violence: is there a link? Scandinavian Journal of Public Health, 42(4), 358–363.PubMedCrossRef

Oldehinkel, A. J., Hartman, C. A., Ferdinand, R. F., Verhulst, F. C., & Ormel, J. (2007). Effortful control as modifier of the association between negative emotionality and adolescents’ mental health problems. Development and Psychopathology, 19, 523–539.PubMedCrossRef

Pace, U., Zappulla, C., Guzzo, G., Di Maggio, R., Laudani, C., & Cacioppo, M. (2014). Internet addiction, temperament, and the moderator role of family emotional involvement. International Journal of Mental Health and Addiction, 12(1), 52–63.CrossRef

Pacula, R. L., Kilmer, B., Wagenaar, A. C., Chaloupka, F. J., & Caulkins, J. P. (2014). Developing public health regulations for marijuana: lessons from alcohol and tobacco. American Journal of Public Health, 104(6), 1021–1028.PubMedPubMedCentralCrossRef

Pardini, D., Bechtold, J., Loeber, R., & White, H. (2015). Developmental trajectories of marijuana use among men examining linkages with criminal behavior and psychopathic features into the mid-30s. Journal of Research in Crime and Delinquency, 52(6), 797–828.PubMedCrossRef

Passanisi, A., & Pace, U. (2017). The unique and common contributions of impulsivity and decision-making strategies among young adult Italian regular gamblers. Personality and Individual Differences, 105, 24–29.CrossRef

Passarotti, A., Crane, N. A., Hedeker, D., & Mermelstein, R. J. (2015). Longitudinal trajectories of marijuana use from adolescence to young adulthood. Addictive Behaviors, 45, 301–308.PubMedPubMedCentralCrossRef

Pechorro, P., Hawes, S. W., Gonçalves, R. A., & Ray, J. V. (2017). Psychometric properties of the inventory of callous-unemotional traits short version (ICU-12) among detained female juvenile offenders and community youths. Psychology, Crime & Law, 23(3):221-239.

Platt, B., Kamboj, S., Morgan, C. J., & Curran, H. V. (2010). Processing dynamic facial affect in frequent cannabis-users: evidence of deficits in the speed of identifying emotional expressions. Drug and Alcohol Dependence, 112(1), 27–32.PubMedCrossRef

Preacher, K. J., & Hayes, A. F. (2008). Asymptotic and resampling strategies for assessing and comparing indirect effects in multiple mediator models. Behavior Research Methods, 40(3), 879–891.PubMedCrossRef

Preacher, K. J., & Kelley, K. (2011). Effect size measures for mediation models: quantitative strategies for communicating indirect effects. Psychological Methods, 16(2), 93–115.PubMedCrossRef

Raftery, A. E. (1995). Bayesian model selection in social research. Sociological Methodology, 25, 111–164.CrossRef

Rippeth, J. D., Heaton, R. K., Carey, C. L., Marcotte, T. D., Moore, D. J., Gonzalez, R., et al. (2004). Methamphetamine dependence increases risk of neuropsychological impairment in HIV infected persons. Journal of the International Neuropsychological Society, 10(1), 1–14.PubMedCrossRef

Rothbart, M. K., Ellis, L. K., Rueda, M. R., & Posner, M. I. (2003). Developing mechanisms of temperamental effortful control. Journal of Personality, 71(6), 1113–1143.PubMedCrossRef

Rubino, T., Realini, N., Braida, D., Guidi, S., Capurro, V., Vigano, D., et al. (2009). Changes in hippocampal morphology and neuroplasticity induced by adolescent THC treatment are associated with cognitive impairment in adulthood. Hippocampus, 19(8), 763–772.PubMedCrossRef

Schneider, M., & Koch, M. (2003). Chronic pubertal, but not adult chronic cannabinoid treatment impairs sensorimotor gating, recognition memory, and the performance in a progressive ratio task in adult rats. Neuropsychopharmacology, 28, 1760–1769.PubMedCrossRef

Schoeler, T., Theobald, D., Pingault, J.-B., Farrington, D. P., Jennings, W. G., Piquero, A. R., Coid, J. W., & Bhattacharyya, S. (2016). Continuity of cannabis use and violent offending over the life course. Psychological Medicine, 46(8), 1663–1677.PubMedCrossRef

Shaffer, D., Fisher, P., Lucas, C. P., Dulcan, M. K., & Schwab-Stone, M. E. (2000). NIMH diagnostic interview schedule for children version IV (NIMH DISC-IV): description, differences from previous versions, and reliability of some common diagnoses. Journal of the American Academy of Child and Adolescent Psychiatry, 39(1), 28–38.PubMedCrossRef

Sobell, L. C., Kwan, E., & Sobell, M. B. (1995). Reliability of a drug history questionnaire (DHQ). Addictive Behaviors, 20(2), 233–241.PubMedCrossRef

Spear, L. (2010). The behavioral neuroscience of adolescence. New York: W.W. Norton & Company

Squeglia, L. M., Jacobus, J., & Tapert, S. F. (2009). The influence of substance use on adolescent brain development. Clinical EEG and Neuroscience, 40(1), 31–38.PubMedPubMedCentralCrossRef

Steinberg, L. (2005). Cognitive and affective development in adolescence. Trends in Cognitive Sciences, 9(2), 69–74.PubMedCrossRef

Tucker, D. M., Luu, P., & Derryberry, D. (2005). Love hurts: the evolution of empathic concern through the encephalization of nociceptive capacity. Development and Psychopathology, 17(3), 699–713.PubMedCrossRef

Viding, E. M., Sebastian, C. L., Dadds, M. R., Lockwood, P. L., Cecil, C. A. M., De Brito, S. A., & McCrory, E. J. P. (2012). Amygdala response to preattentive masked fear in children with conduct problems: the role of callous-unemotional traits. American Journal of Psychiatry, 169, 1109–1116.PubMedCrossRef

Volkow, N. D., Baler, R. D., Compton, W. M., & Weiss, S. R. (2014). Adverse health effects of marijuana use. New England Journal of Medicine, 370(23), 2219–2227.PubMedCrossRef

Waller, R., Wright, A. G., Shaw, D. S., Gardner, F., Dishion, T. J., Wilson, M. N., & Hyde, L. W. (2015). Factor structure and construct validity of the parent-reported inventory of callous-unemotional traits among high-risk 9-year-olds. Assessment, 22(5), 561–580.PubMedCrossRef

White, S. F., Marsh, A. A., Fowler, K. A., Schechter, J. C., Adalio, C., Pope, K., et al. (2012). Reduced amygdala response in youths with disruptive behavior disorders and psychopathic traits: decreased emotional response versus increased top-down attention to nonemotional features. American Journal of Psychiatry, 169(7), 750–758. https://doi.org/10.1176/appi.ajp.2012.11081270.CrossRefPubMed

White, H. R., Bechtold, J., Loeber, R., & Pardini, D. (2015). Divergent marijuana trajectories among men: socioeconomic, relationship, and life satisfaction outcomes in the mid-30s. Drug and Alcohol Dependence, 156, 62–69.PubMedPubMedCentralCrossRef

Wilkinson, S., Waller, R., & Viding, E. (2015). Practitioner review: involving young people with callous unemotional traits in treatment—does it work? A systematic review. Journal of Child Psychology and Psychiatry, 57(5), 552–565.PubMedCrossRef

World Medical Association (2008). Declaration of Helsinki: ethical principle for medical research involving human subjects. Seoul: 59th WMA General Assembly.

Zeman, J., Cassano, M., Perry-Parrish, C., & Stegall, S. (2006). Emotion regulation in children and adolescents. Journal of Developmental and Behavioral Pediatrics, 27(2), 155–168.PubMedCrossRef

Title: Adolescent Cannabis Use and Conduct Problems: the Mediating Influence of Callous-Unemotional Traits
Authors: Samuel W. Hawes
Ileana Pacheco-Colón
J. Megan Ross
Raul Gonzalez
Publication date: 01-06-2020
Publisher: Springer US
Published in: International Journal of Mental Health and Addiction / Issue 3/2020
Print ISSN: 1557-1874
Electronic ISSN: 1557-1882
DOI: https://doi.org/10.1007/s11469-018-9958-9

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Adolescent Cannabis Use and Conduct Problems: the Mediating Influence of Callous-Unemotional Traits

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