Best Practices for Using Median Splits, Artificial Categorization, and their Continuous Alternatives

Methodologists have long discussed the costs and benefits of using medians or other cut points to artificially turn continuous variables into categorical variables. The current paper attempts to provide a perspective on this literature that will be of practical use to experimental psychopathologists. After discussing the reasons that clinical researchers might use artificial categorization, we summarize the arguments both for and against this procedure. We then provide a number of specific suggestions related to the use of artificial categorization, including our thoughts on when researchers should use artificial categories, how their use can be justified, what continuous alternatives are available, and how the continuous alternatives should be used

Cumulative stress in childhood is associated with blunted reward-related brain activity in adulthood

Early life stress (ELS) is strongly associated with negative outcomes in adulthood, including reduced motivation and increased negative mood. The mechanisms mediating these relations, however, are poorly understood. We examined the relation between exposure to ELS and reward-related brain activity, which is known to predict motivation and mood, at age 26, in a sample followed since kindergarten with annual assessments. Using functional neuroimaging, we assayed individual differences in the activity of the ventral striatum (VS) during the processing of monetary rewards associated with a simple card-guessing task, in a sample of 72 male participants. We examined associations between a cumulative measure of ELS exposure and VS activity in adulthood. We found that greater levels of cumulative stress during childhood and adolescence predicted lower reward-related VS activity in adulthood. Extending this general developmental pattern, we found that exposure to stress early in development (between kindergarten and grade 3) was significantly associated with variability in adult VS activity. Our results provide an important demonstration that cumulative life stress, especially during this childhood period, is associated with blunted reward-related VS activity in adulthood. These differences suggest neurobiological pathways through which a history of ELS may contribute to reduced motivation and increased negative mood

Predictors and outcomes associated with the growth curves of self-efficacy beliefs in regard to anger and sadness regulation during adolescence: a longitudinal cross-cultural study

IntroductionThis longitudinal study examined unique and joint effects of parenting and negative emotionality in predicting the growth curves of adolescents’ self-efficacy beliefs about regulating two discrete negative emotions (anger and sadness) and the association of these growth curves with later maladjustment (i.e., internalizing and externalizing problems).MethodsParticipants were 285 children (T1: Mage = 10.57, SD = 0.68; 53.3% girls) and their parents (mothers N = 286; fathers N = 276) from Colombia and Italy. Parental warmth, harsh parenting, and internalizing and externalizing problems were measured in late childhood at T1, whereas early adolescents’ anger and sadness were measured at T2 (T2: Mage = 12.10, SD = 1.09). Adolescent self-efficacy beliefs about anger and sadness regulation were measured at five time-points from T2 to T6 (T6: Mage = 18.45, SD = 0.71), and internalizing and externalizing problems were measured again at T6.ResultsMulti-group latent growth curve models (with country as the grouping variable) demonstrated that in both countries there was on average a linear increase in self-efficacy about anger regulation and no change or variation in self-efficacy about sadness regulation. In both countries, for self-efficacy about anger regulation (a) T1 harsh parenting and T1 externalizing problems were negatively associated with the intercept, (b) T2 anger was negatively associated with the slope, and (c) the intercept and the slope were associated with lower T6 internalizing and externalizing problems, controlling for T1 problems. For self-efficacy about sadness regulation, (a) T1 internalizing problems were negatively associated with the intercept only in Italy, (b) T2 sadness was negatively associated with the intercept only in Colombia, and (c) the intercept negatively predicted T6 internalizing problems.DiscussionThis study advances knowledge of the normative development of self-efficacy beliefs about anger and sadness regulation during adolescence across two countries, highlighting the predictive value of pre-existing family and individual characteristics on this development and prediction by the development of self-efficacy beliefs on later adjustment

Risk and Outcomes: Are Adolescents Charged with Sex Offenses Different from Other Adolescent Offenders?

Juveniles who have committed sexual offenses are subject to specialized treatment and policies based on their assumed unique dangerousness, despite contradictory evidence. Limited information is available regarding risk factors and their relationships to outcomes in this population. The comparative frequency and predictive utility of empirically supported risk factors for general delinquency were examined using data from the Pathways to Desistance study. Adolescent males who committed sexual offenses (n = 127) were compared to adolescent males who committed non-sexual offenses (n = 1021). At the start of the study, the sample ranged in age from 14 to 18 (M = 16.00, SD = 1.12) and self-identified as primarily African American (44 %), Latino (29 %), or White (25 %). Outcomes were measured over 7 years and included general and sexual recidivism, involvement in school and work, and positive relationships with peers and adults. The results indicated a few small differences in the presence of risk factors and their relationship to outcomes, with many similarities. Juveniles who have committed sexual offenses had equivalent general recidivism but higher sexual recidivism, though this rate was low (7.87 %, or 10 of the 127 adolescents who had committed sexual offenses). New clinical and policy approaches may be needed given the similarities between groups

A novel homozygous variant in the SPG7 gene presenting with childhood optic nerve atrophy

Purpose To describe a case of hereditary spastic ataxia (HSP) presenting with childhood optic nerve atrophy and report a novel homozygous variant in the SPG7 gene. Observations A 57-year-old man suffering from progressive optic nerve atrophy since childhood eventually underwent genetic testing. A targeted whole exome gene sequencing panel for optic neuropathy identified a novel homozygous variant in the SPG7 gene, c.2T > G, p.(Met?), which likely abolished production of paraplegin, an inner mitochondrial membrane protein. Subsequent neurologic examination revealed subtle signs of spastic paraplegia and ataxia in keeping with the genetic diagnosis of SPG7. Conclusion and importance Spastic paraplegia 7 (SPG7) is an autosomal recessive form of the neurodegenerative disorder HSP. Pure HSP is characterized by spastic paraparesis in the lower limbs, whereas complicated HSP presents additional neurological manifestations. This case report adds to the evidence that SPG7 can present with childhood optic nerve atrophy, preceding the characteristic SPG7 manifestations. SPG7 should be considered in the workup of suspected hereditary optic neuropathy

Cumulative stress in childhood is associated with blunted reward-related brain activity in adulthood

Early life stress (ELS) is strongly associated with negative outcomes in adulthood, including reduced motivation and increased negative mood. The mechanisms mediating these relations, however, are poorly understood. We examined the relation between exposure to ELS and reward-related brain activity, which is known to predict motivation and mood, at age 26, in a sample followed since kindergarten with annual assessments. Using functional neuroimaging, we assayed individual differences in the activity of the ventral striatum (VS) during the processing of monetary rewards associated with a simple card-guessing task, in a sample of 72 male participants. We examined associations between a cumulative measure of ELS exposure and VS activity in adulthood. We found that greater levels of cumulative stress during childhood and adolescence predicted lower reward-related VS activity in adulthood. Extending this general developmental pattern, we found that exposure to stress early in development (between kindergarten and grade 3) was significantly associated with variability in adult VS activity. Our results provide an important demonstration that cumulative life stress, especially during this childhood period, is associated with blunted reward-related VS activity in adulthood. These differences suggest neurobiological pathways through which a history of ELS may contribute to reduced motivation and increased negative mood

Psychopathic Traits in Adolescence: The Importance of Examining Components in Face Processing, Voice Processing, and Emotional Skill

© 2018, Springer Science+Business Media, LLC, part of Springer Nature. This study examined relations among interpersonal, affective, and impulsive-irresponsible psychopathic traits, emotional capacities, and recidivism rates in 144 detained adolescents. Emotional skill was conceptualized using a range of constructs, including face and voice processing, emotional intelligence, and self-reported cognitive and affective empathy. In addition, the relation between these concepts and recidivism three years after the initial assessment was examined. Results indicated that interpersonal traits were positively associated with better facial identification of fearful faces, whereas affective traits were associated with worse facial identification of sad and happy faces as well as angry voices. Impulsive-irresponsible traits were associated with reduced emotional intelligence. Differential predictive utility of the three psychopathic traits dimensions was also evidenced. Findings highlight the need to consider the broad concept of psychopathy, but also its underlying dimensions

Corrigendum to "Parents' and early adolescents' self-efficacy about anger regulation and early adolescents' internalizing and externalizing problems: A longitudinal study in three countries" [Journal of Adolescence 64 (2018) 124-135]

The authors regret that the following errors were present in the above-mentioned article. Page 126 2.1. Sample 1st line “Participants were recruited from the longitudinal blinded for review Study (e.g., blinded for review).” Should read: “Participants were recruited from the longitudinal Study entitled Parenting Across Cultures (e.g., Lansford et al., 2014).” Page 127 2.1. Sample 8th line “Over 81% of mothers, 77% of fathers, and 81% of children from the initial sample (see Blinded). Study provided data at T1.” Should read: “Over 81% of mothers, 77% of fathers, and 81% of children from the initial sample of Parenting across Cultures Study provided data at T1.” Page 129 2.3.2. Early adolescents' self-efficacy beliefs about anger regulation (T2) 7th line “We examined youths' answers about how well they could deal with their anger in the three out of six vignettes (1=not at all well – 5=very well) that had the highest factor loadings in a confirmatory factor analysis conducted with this same sample (Blinded for review).” Should read: “We examined youths' answers about how well they could deal with their anger in the three out of six vignettes (1=not at all well – 5=very well) that had the highest factor loadings in a confirmatory factor analysis conducted with this same sample (Di Giunta et al., 2017).” Page 135 References 41st line The following reference is missing from the reference section: Lansford, J. E., Sharma, C., Malone, P. S., Woodlief, D., Dodge, K. A., Oburu, P., … & Tirado, L. M. U. (2014). Corporal punishment, maternal warmth, and child adjustment: A longitudinal study in eight countries. Journal of Clinical Child & Adolescent Psychology, 43(4), 670–685. The authors would like to apologise for any inconvenience caused

Parents' and early adolescents' self-efficacy about anger regulation and early adolescents' internalizing and externalizing problems. A longitudinal study in three countries

The present study examines whether early adolescents' self-efficacy beliefs about anger regulation mediate the relation between parents' self-efficacy beliefs about anger regulation and early adolescents' internalizing and externalizing problems. Participants were 534 early adolescents (T1: M age = 10.89, SD =.70; 50% female), their mothers (n = 534), and their fathers (n = 431). Families were drawn from Colombia, Italy, and the USA. Follow-up data were obtained two (T2) and three (T3) years later. At T1 and T3, parents' self-efficacy beliefs were self-reported and internalizing and externalizing problems were assessed via mothers', fathers', and early adolescents' reports. At T2, early adolescents' self-efficacy beliefs were self-reported Within the overall sample, mothers with higher self-efficacy beliefs about anger regulation had children with similar beliefs. Early adolescents' low self-efficacy beliefs were associated with higher internalizing and externalizing problems