Paul J. Frick

TL;DR: The Diagnostic and Statistical Manual of Mental Disorders (DSM-III-R; American Psychiatric Association, 1987) delineates three syndromes within the broad category of Disruptive Behavior Disorders (DBDs) as mentioned in this paper.

TL;DR: In this article, a comprehensive measure of callous-unemotional (CU) traits was tested in a sample of 540 Italian children in grades 6 and 8 and found that CU traits were positively associated with school behavior problems, bullying, and reactive aggression and this was largely accounted for by callousness and uncaring subscales.

TL;DR: This paper found that children with severe conduct problems often exhibit intellectual deficits, especially in their verbal abilities, and they investigated whether or not this finding only applies to certain subgroups of children who suffer from severe conduct disorders.

TL;DR: This paper found that callous-unemotional (CU) traits (e.g., lack of guilt, absence of empathy, callous use of others) seem to be relatively stable across childhood and adolescence and they designate a group of youth with a particularly severe, aggressive, and stable pattern of antisocial behavior.

TL;DR: The concept of psychopathy has a long and prominent history in clinical psychology as discussed by the authors, and the DSM-III and its later revisions (DSM-III-R; American Psychiatric Association, 1987; DSM-IV; DSMIV; American psychiatric Association, 1994) break with these early conceptualizations of psychopath in their definitions of Antisocial Personalty Disorder (APD).