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BACKGROUND Despite an expanding epidemiological evidence base, uncertainties remain over key aspects of the epidemiology of the 'antisocial' disorders in childhood and adolescence. METHODS We used cross-sectional data on a nationally representative sample of 10,438 5-15-year-olds drawn from the 1999 British Child Mental Health Survey to examine age(More)
The Diagnostic and Statistical Manual of Mental Disorders, 4th edition (DSM-IV; American Psychiatric Association, 1994) specifies a developmental relationship between oppositional defiant disorder (ODD) and conduct disorder (CD). Evidence for this link is mixed, however, and recent studies suggest that different symptom dimensions in ODD may have different(More)
OBJECTIVE We set out to examine the relationship between unintentional injury and common child psychiatric disorders, including both internalizing and externalizing diagnoses. METHODS The 1999 British Child and Adolescent Mental Health Survey provided a nationally representative sample of over 10,000 children aged 5-15 years. Measures included assessment(More)
OBJECTIVES Little is known about the aetiology of the links between sleep disturbance and anxiety and depression symptoms. The aim of this study was to estimate genetic and environmental influences on these associations. METHODS Questionnaires were completed by 1556 young adults from twin and sibling pairs (61.5% female). RESULTS Sleep disturbance was(More)
The effects of self-affirmation manipulations are not yet well understood because several different affirmation manipulations have been tested using multiple dependent variables. The aim of the present research was to establish whether global self-feelings and self-esteem, or interpersonal positive feelings are affected by affirming the self. Experiment 1(More)
A methodology that addresses important issues concerned with the underlying graphical models designed for surgical simulation, as well as issues related to the real-time interactivity with, and manipulation of, these models is presented. The specific application of interest is laparoscopic surgery, which is performed using endoscopes that present a video(More)
BACKGROUND Callous and unemotional (CU) traits might usefully subtype DSM-IV conduct disorder (CD). We investigate this hypothesis in a large, nationally representative sample of 5-16-year-olds. We also examine the characteristics of children with high CU traits but without CD. METHODS Data come from the 2004 British Child and Adolescent Mental Health(More)
BACKGROUND We examine models of the relationship between oppositional defiant disorder (ODD) and conduct disorder (CD) in a community sample. Particular attention is paid to the generalisability of findings based on clinic-referred boys. METHODS The analyses were based on four waves of data from the Great Smoky Mountains Study covering children in the(More)
BACKGROUND Studies linking testosterone and antisocial behavior in humans have produced mixed results. Adolescence offers a promising period to study this relationship; circulating testosterone increases dramatically in boys during puberty, and antisocial behavior increases during the same period. METHODS Our analyses were based on boys aged 9-15 years(More)
The importance of irritability, as measured among the symptoms of oppositional defiant disorder (ODD), has dramatically come to the fore in recent years. New diagnostic categories rely on the distinct clinical utility of irritability, and models of psychopathology suggest it plays a key role in explaining developmental pathways within and between disorders(More)