The control of responsiveness in ADHD by catecholamines: evidence for dopaminergic, noradrenergic and interactive roles

We explore the neurobiological bases of attention deficit hyperactivity disorder (ADHD) from the viewpoint of the neurochemistry and psychopharmacology of the catecholamine-based behavioural systems. The contributions of dopamine (DA) and noradrenaline (NA) neurotransmission to the motor and cognitive symptoms of ADHD (e.g. hyperactivity, variable and impulsive responses) are studied in rodent and primate models. These models represent elements of the behavioural units observed in subjects with ADHD clinically, or in laboratory settings (e.g. locomotion, changed sensitivity/responsivity to novelty/reinforcement and measures of executive processing). In particular, the models selected emphasize traits that are strongly influenced by mesocorticolimbic DA in the spontaneously hypertensive (SHR) and the Naples high excitability (NHE) rat lines. In this context, the mode of action of methylphenidate treatment is discussed. We also describe current views on the altered control by mesolimbic catecholamines of appropriate and inappropriate goal-directed behaviour, and the tolerance or intolerance of delayed reinforcement in ADHD children and animal models. Recent insights into the previously underestimated role of the NA system in the control of mesocortical DA function, and the frontal role in processing information are elaborated.     

Mental health, life stress and social support among young Norwegian adolescents with immigrant and host national background

The first aim of the study was to investigate differences in level of mental health, life stress and social support among adolescents with immigrant and domestic background. A second aim was to identify culture group and gender specific sources of risk and protective factors and their relation to mental health. Questionnaire data were collected from 633 students, aged 13, in Oslo, Norway. Immigrant adolescents reported higher level of psychological distress and lower social support than host students. Of the four gender-culture groups, immigrant boys reported the highest level of problems, with a 28% prevalence of anxiety/depression. There were no significant differences in prevalence among the girls. Specific patterns of relationships between life stress, support, and mental health were found across gender and culture. The results were discussed within a framework of culture differences in values and gender role expectancies, underscoring the importance of studying each gender/culture group separately.     

Pretend companions (imaginary playmates): the emergence of a field

Over the last century, investigation of pretend companions has developed as an emerging field. Although pretend companions are a commonplace childhood phenomenon and perhaps an epitome of children's imagination, that topic received little attention before the end of the 19th century. Only since the last decade has attention to it truly begun to burgeon. Broad developments in the history of thought and research on pretend companions fall into 6 stages: (a) early history, (b) early theory, (c) earliest empirical research, (d) midcentury lull, (e) a renewal of empirical attention, and (f) emergence into a significant field whose investigators are committed to reliable, increasingly sophisticated methods and to the examination of pretend companions within the broader context of pretend play. Following depictions of the field's past and current status, the authors present future directions for its progress.     

Coping with condom embarrassment

This study assesses the embarrassment associated with purchasing, carrying, storing, using and disposing of condoms. It incorporates coping theory into the investigation of embarrassment by analysing the strategies individuals use to cope with embarrassment during condom purchase. The results of a survey show that individuals are embarrassed at various stages related to condom use. Purchasing condoms elicits the most embarrassment, followed by carrying and disposing, while using and storing are the least embarrassing. To cope with their embarrassment while purchasing condoms, people use multiple cognitive and behavioural coping strategies, with embarrassed people using more strategies. Both embarrassment and the number of strategies used decrease with age and experience. It appears that embarrassment associated with condoms remains a barrier to condom acquisition and consistent condom use, particularly among young adult populations. Coping strategies help individuals to bridge the gap between embarrassment and use.     

Joint attention in term and preterm infants at 12 months corrected age: the significance of gender and intervention based on a randomized controlled trial

This study tested the effects of optimized neonatal mother–infant transactions on joint attention performance at 12 months. Surviving infants <2000 g from a geographically defined area were randomly assigned to a preterm intervention (n = 71) or preterm control group (n = 69). Comparisons were made between preterm groups, secondary with a term group (n = 75). Joint attention was measured using the Early Social Communication Scales. Preterm intervention infants scored significantly higher than preterm control infants on elements Initiating Joint Attention (p < 0.05), Initiating Object Requests (p < 0.05), and Responding to Social Interaction (p < 0.0005). Intervention was not associated with performance on elements Responding to Joint Attention, or on Responding to Requests. ELBW infants scored significantly lower than VLBW and LBW infants on imperative functions. Girls outperformed boys on all communication elements. An intervention implemented during the neonatal period can be of advantage for certain aspects of joint attention performance in preterm infants.     

A survey of mental health care provider's and managed care organization attitudes toward, familiarity with, and use of group interventions

Managed Care has had a significant impact on delivery systems for mental health services. Direct and indirect persuasion to provide more cost-effective treatments has been one consequence. The cost-saving qualities and the effectiveness of group interventions have produced clear expectations for an increased use of therapy groups. This study compared perceptions and uses of group treatments on a national sample of managed care organizations and mental health providers. Because group psychotherapy encompasses such a broad definition, five specific types of group interventions were defined: problem-focused homogenous, process-oriented heterogeneous, psycho-educational, self-help, and short-term groups. Implications of differences and similarities between directors of managed care organizations and treatment providers are examined and discussed across five response categories (familiarity/training, perceived effectiveness, likelihood of reimbursement/referral, daily use, and expectation for future use).     

Social representations of smoking and attitudes towards smoking restrictions in the Norwigian Navy

The present study investigated the relationship bewteen social representations about smokers and smoking, and attitudes towards smoking restrictions. Data were collected by means of questionnaires among a sample of employees ( n =4224)in the Norwegian Navy. Based on the results from first- and second-order principal components analyses, three dimensions of social representations were identified. The dimensions were labeled "negative representations", "positive representations" and "social influence". The three dimensions clearly differentiated between daliy, occasional and non-smokers. Further, structural equation modeling of the relation between social representations and attitudes towards smoking restrictions, indicated that social representations function as intermediating factors of the effect from smoking states upon attitudes towards smoking restrictions.
The findings indicate the need to focus upon social psyshological processes taking place in the ineraction between groups of smokers and non-smokers, as understanding of such processes may be relevant in preventing the development of group conflict.     

Infants’ unprovoked acts of force toward others

Infants harm others at higher rates than older children and adults. A common explanation is that infants fail to regulate their frustration, becoming aggressive when they do not get what they want. The present research investigated whether infants also use force against others without provocation, for instance because they seek to explore the consequences of hitting or try to pet someone using too much force. Two studies with infants aged 11 to 24 months investigated infants’ use of force against others in everyday life using maternal report (Study 1) and direct observation (Study 2). In both studies, a large proportion of infants’ acts of force were unprovoked and occurred without signs of infant distress. Unlike provoked acts, unprovoked acts showed a decrease late in the second year and were positively associated with reports of infant pleasure‐proneness. The presence of unprovoked acts of harm may reflect that infants’ actions are not reliably guided by an aversion for harming others and may provide unique opportunities for early moral development.