Trait impulsivity and callous-unemotional traits as predictors of inhibitory control and risky choices among high-risk adolescents

Trait impulsivity and callous-unemotional traits are associated with behavioural problems among high-risk adolescents. While both are known to influence behaviour, the nature of their expression in high-risk behaviours, particularly those related to inhibitory control, is not well understood. In the current, preliminary study, we examined whether and how these traits predicted deficits in behaviour driven by bottom-up, automatic versus deliberate, top-down inhibitory processes among high-risk adolescents. Two go/no-go task variants, emotional and non-emotional, were used to assess reactive response inhibition, and the Balloon Analogue Risk Task was used to assess the ability to resist deliberate risky choices. The results showed that the two types of self-reported trait measures were differentially associated with performance on the two types of behavioural inhibition tasks. Trait impulsivity predicted non-emotional inhibitory control whereas callous-unemotional traits predicted risky choices. The results also showed that the emotions task elicited slower reaction times and higher false alarm rates than did the letters task, and that participants had greater difficulty inhibiting responses to negatively than to positively valenced no-go stimuli. While preliminary, the results suggest that the interplay between trait impulsivity and callous-unemotional traits is an important determinant of inhibitory behaviour in this high-risk adolescents.     

An experimental evaluation of school social work

The main results of the Central Lancashire Family and Community Project are reported. The project extended from 1965 to 1973 and attempted to determine experimentally the value of social work undertaken in secondary schools. Significant reductions in juvenile maladjustment and misbehaviour, both short- and long-term, were achieved. While children sent to court showed some behavioural improvement, this was accompanied by a deterioration in measures of adjustment; whereas treatment of a matched sample by school social workers was associated with sustained improvement both in behaviour and in test measures of social adjustment. The school setting was shown to have impeded the workers in a variety of ways: teachers' judgements of what were suitable cases to refer were biassed towards certain kinds of behaviour, and the teachers expected the social workers to achieve unrealistically rapid behavioural improvement. There was also pressure upon the workers to over-identify with the school, its ethos and its staff, and to become too generously involved in school activities, which interfered with their relationships with the children and the time available for social work — especially home visiting. These handicaps, however, were more than offset by the advantages of the school setting in aiding the identification of needy cases at an early stage in the development of their problems, and in undertaking sustained, beneficial casework Furthermore, there were indications that the presence of the worker in itself tended to change the ethos of the school.     

Reflexive shifts of covert attention operate in an egocentric coordinate frame.

Covert shifts of attention have been shown to improve detection and discrimination thresholds for a range of visual stimuli. Although there is some evidence to suggest that the allocation of attention to a particular region of interest occurs in a retinotopic frame of reference, the importance of an allocentric, or object-based, framework has gained widespread empirical support. The current experiment investigates the nature of the spatial representation in which covert shifts of attention occur in response to a reflexive prime. Primes and targets were presented in four conditions designed to vary systematically the validity of the spatial relationship between the prime and target in egocentric or allocentric coordinate frameworks. A significant advantage, in terms of reaction time and correct identification, was found for targets located in positions previously primed in an egocentric (but not allocentric) framework whereas there was no advantage for locations primed in an allocentric (but not egocentric) framework. These results suggest that the allocation of covert spatial attention within an egocentric framework may be more important than previously thought.