Exploring how symptoms of attention-deficit/hyperactivity disorder are related to reading and mathematics performance: general genes, general environments

Children with attention-deficit/hyperactivity disorder (ADHD) tend to perform more poorly on tests of reading and mathematical performance than their typical peers. Quantitative genetic analyses allow for a better understanding of the etiology of ADHD and reading and mathematics outcomes, by examining their common and unique genetic and environmental influences. Analyses were conducted on a sample 271 pairs of 10-year-old monozygotic and dizygotic twins drawn from the Western Reserve Reading and Mathematics Project. In general, the results suggested that the associations among ADHD symptoms, reading outcomes, and math outcomes were influenced by both general genetic and general shared-environment factors. The analyses also suggested significant independent genetic effects for ADHD symptoms. The results imply that differing etiological factors underlie the relationships among ADHD and reading and mathematics performance. It appears that both genetic and common family or school environments link ADHD with academic performance.     

Depressive symptoms and one year mortality among elderly patients discharged from a rehabilitation ward after orthopaedic surgery of the lower limbs

The objective of the present prospective observational study is to evaluate the effect of depressive symptoms on 1-year mortality in a population of elderly patients discharged from a rehabilitation unit after orthopaedic surgery of the lower limbs. A total of 222 elderly inpatients were included, and stratified according to 12-months survival. 14 (6.3%) of the patients who were eligible for this study died during the 12-months period after discharge. As expected, patients who died were significantly older, lower cognitive performance, more depressive symptoms, poorer nutritional status and higher comorbidity in comparison to those who survived. Furthermore, they were generally more functionally dependent on admission to the Department, had worse functional recovery and were more disable at discharge, although a longer length of stay comparing to survived patients. In the adjusted logistic regression model, after adjustment for possible confounders and covariates, the presence of severe depressive symptoms significantly predicted a four-fold risk of death at 12 months. The only other factor associated poor 12-months survival was comorbidity, that predicted a 6-fold risk of death. In conclusions this study suggests that severe depressive symptoms on admission predicts 1-year mortality in elderly patients discharged from a post-acute care unit after orthopaedic rehabilitation.     

Generalizing on Best Practices in Image Processing: A Model for Promoting Research Integrity

Modifying images for scientific publication is now quick and easy due to changes in technology. This has created a need for new image processing guidelines and attitudes, such as those offered to the research community by Doug Cromey (Cromey 2010). We suggest that related changes in technology have simplified the task of detecting misconduct for journal editors as well as researchers, and that this simplification has caused a shift in the responsibility for reporting misconduct. We also argue that the concept of best practices in image processing can serve as a general model for education in best practices in research.     

Development of aptitude at altitude

Millions of people currently live at altitudes in excess of 2500 metres, where oxygen supply is limited, but very little is known about the development of brain and behavioural function under such hypoxic conditions. We describe the physiological, cognitive and behavioural profile of a large cohort of infants (6–12 months), children (6–10 years) and adolescents (13–16 years) who were born and are living at three altitude locations in Bolivia (～500 m, ～2500 m and ～3700 m). Level of haemoglobin oxygen saturation and end‐tidal carbon dioxide were significantly lower in all age groups living above 2500 metres, confirming the presence of hypoxia and hypocapnia, but without any detectable detriment to health. Infant measures of neurodevelopment and behaviour yielded comparable results across altitude groups. Neuropsychological assessment in children and adolescent groups indicated a minor reduction in psychomotor speed with increasing altitude, with no effect of age. This may result from slowing of underlying brain activity in parallel with reduced cerebral metabolism and blood flow, evidenced here by reduced cerebral blood flow velocity, particularly in the basilar artery, in children and adolescents. The proportion of European, Native American and African genetic admixture was comparable across altitude groups, suggesting that adaptation to high altitude in these children occurred in response to chronic hypoxic exposure irrespective of ethnic origin. Thus, psychomotor slowing is proposed to be an adaptive rather than a deficient trait, perhaps enabling accuracy of mental activity in hypoxic conditions.     

The drive for muscularity in men: Media influences and objectification theory

Presently, objectification theory has yielded mixed results when utilized to explain body image concerns in men. An online survey assessing internalization of media ideals, self-objectification, body surveillance, body shame, the drive for muscularity, and body mass index (BMI) was completed by 244 predominantly college-aged males. Path analyses were used to investigate relationships among these variables where it was hypothesized that objectification variables would mediate the relationship between internalization of media ideals and the drive for muscularity. Internalization of media ideals was the strongest predictor of the drive for muscularity, followed by BMI, though variables of objectification theory had no impact on the drive for muscularity contrary to hypotheses. The results suggest that objectification theory may not be applicable to men as it is currently measured.     

Community violence victimization and aggressive behavior: the moderating effects of coping and social support

Exposure to community violence (CV) as a victim is an established risk factor for exhibiting later aggressive behavior. It is unclear, however, what factors may mitigate this relationship. This study tested the relationship of CV victimization to aggressive behavior, and the roles of coping style and perceived social support in moderating that relationship. Five hundred and fifteen 18–22‐year‐old men and women completed self‐report inventories on CV exposure, aggressive behavior, perceived support from family and friends, and coping strategies. From a prior study, factor analysis of the coping scales yielded three factors of (1) disengagement (i.e., using primarily avoidant strategies), (2) interpersonal (i.e., using primarily emotion‐focused strategies) and (3) problem‐focused (i.e., using primarily active/approach strategies) coping styles. Results indicated that high CV victimization, high disengagement (i.e., avoidant) and interpersonal (i.e., emotion‐focused) coping styles, and low perceived support from friends significantly predicted increased aggression scores. Significant moderating effects indicated that, as CV victimization increased in frequency, aggression scores were highest for those with low perceived friend support and high use of disengagement coping. Findings suggest that avoidant and emotion‐focused coping styles are risk factors, and perceived support from friends is a protective factor, for a putative “cycle of violence.” Aggr. Behav. 32:502–515. 2006. © 2006 Wiley‐Liss, Inc.     

Sensitivity of passive approach during preference and reinforcer assessments for children with severe and profound intellectual disabilities and minimal movement

We evaluated the use of passive approach to assess preferences of two children, with severe and profound intellectual disabilities. Both children had physical challenges and exhibited minimal physical movement. We also compared the relative reinforcing effects of the identified high and low preference stimuli for a switch pressing response, and for a more passive looking response. High and low preference stimuli were identified for both children. Moreover, the high preference stimulus maintained higher rates of responding than the low preference stimulus for both children for the passive looking response, but not for switch pressing. The study extended the use of passive approach to assess preferences and identified the choice of target response as a potential limiting factor during reinforcer tests for these children. Copyright © 2006 John Wiley & Sons, Ltd.     

Equality: Putting the Theory into Action

We outline our central reasons for pursuing the project of equality studies and some of the thinking we have done within an equality studies framework. We try to show that a multi-dimensional conceptual framework, applied to a set of key social contexts and articulating the concerns of subordinate social groups, can be a fruitful way of putting the idea of equality into practice. Finally, we address some central questions about how to bring about egalitarian social change. Editors’ note. John Baker et al’s article below condenses the key themes and arguments of their book, Equality: From Theory to Action. In the next issue of Res Publica, four writers will respond to these arguments, and there will be a reply from the book’s authors. We are grateful to Jurgen De Wispelaere for organising the original workshop on which the article and replies are based, and for his work in putting together this symposium.