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Although low prosocial behavior (LPB) items have been incorporated into youth measures of callousness, it remains unclear from current factor analytic findings whether callous traits and LPB are best operationalized as a common construct, or distinct dimensions. Using data from a population-representative birth cohort (N = 5,463), this study compared 4 latent factor structures for interpersonal callousness (IC; 6 items) and LPB (5 items) at age 13: (a) unidimensional; (b) two-factor; (c) higher-order (with 2 subfactors); and (d) bifactor (1 general and 2 specific residual factors). Alternative models distinguishing positively and negatively worded items were tested for comparative purposes. To assess the external validity of the factors that emerged from the best-fitting model, associations with early parenting styles and psychiatric comorbidities were examined. A bifactor model, achieving invariance for males and females, offered the best fit for these data. However, additional bifactor-specific indices suggested that the specific IC factor did not offer a unique contribution to the total variance over and above the general factor (IC/LPB). Of the remaining factors, IC/LPB was associated with higher levels of harsh parenting, externalizing and internalizing disorder, and social-cognitive difficulties, and lower levels of warm parenting. The LPB factor, meanwhile, was associated with greater social-cognitive difficulties and externalizing disorder, and lower maternal warmth, evoking a phenotype that may be more indicative of the autism spectrum than IC. These findings suggest that the shared variance underlying IC and LPB taps a severe psychiatric phenotype, while the residual variance for LPB may represent a distinct profile of social-cognitive dysfunction. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

Shared and unique variances of interpersonal callousness and low prosocial behavior.