Conditions for young infants' failure to perceive trajectory continuity

When viewing an event in which an object moves behind an occluder on part of its trajectory, 4-month-old infants perceive the trajectory as continuous only when time or distance out of sight is short. Little is known, however, about the conditions under which young infants perceive trajectories to be discontinuous. In the present studies we focus first on infants' perception of trajectories that change during a period of occlusion. Four-month-olds perceive discontinuity in trajectories that change in height or orientation while behind an occluder, and this is true even when a change in direction could be due to an invisible bouncing collision with a surface. Further experiments reveal that infants do not perceive diagonal linear trajectories as continuous across an occlusion unless the occluding and revealing edges are orthogonal to the path of movement. Implications for theories of perceptual and cognitive development are discussed.     

A randomised controlled trial to assess the effectiveness of providing self-help information to people with symptoms of acute stress disorder following a traumatic injury

BACKGROUND: Patients attending accident and emergency (A&E) may develop long-term psychological difficulties. Psycho-education has been suggested to reduce the risk of post-injury disorders. AIMS: We tested the efficacy of providing self-help information to a high-risk sample. METHODS: A&E attenders were screened for acute stress disorder and randomised to two groups: patients (n=116) receiving a self-help booklet and those who did not (n=111). A sample of 'low' scorers was also included (n=120); they did not receive a booklet. Psychological assessments were completed at baseline (within 1 month post-injury) and 3 and 6 months post-injury. RESULTS: Post-traumatic stress disorder (PTSD), anxiety and depression decreased (p<0.001) across time but there were no group differences in these measures or quality of life. However, subjective ratings of the usefulness of the self-help booklet were very high. CONCLUSIONS: This trial failed to support the efficacy of providing self-help information, as a preventative strategy to ameliorate PTSD.     

Performance of unimanual and bimanual multiphased prehensile movements

By manipulating task action demands in 2 experiments, the author investigated whether the context-dependent effects seen in unimanual multiphase movements are also present in bimanual movements. Participants (N = 14) in Experiment 1 either placed or tossed objects into targets. The results indicated that the intention to perform a subsequent action with an object could influence the performance of an earlier movement in a sequence in both unimanual and bimanual tasks. Furthermore, assimilation effects were found when the subsequent tasks being performed by the 2 hands were incongruent. In Experiment 2, the author investigated in 12 participants whether planning in a multiphase movement includes some representation of the accuracy demands of the subsequent task. The accuracy demands of a subsequent task did not appear to influence initial movement planning. Instead, the present results support the notion that it is the action requirements of the subsequent movement that lead to context-dependent effects.     

Translating the Human Right to Water and Sanitation into Public Policy Reform

The development of a human right to water and sanitation under international law has created an imperative to implement human rights in water and sanitation policy. Through forty-three interviews with informants in international institutions, national governments, and non-governmental organizations, this research examines interpretations of this new human right in global governance, national policy, and local practice. Exploring obstacles to the implementation of rights-based water and sanitation policy, the authors analyze the limitations of translating international human rights into local water and sanitation practice, concluding that system operators, utilities, and management boards remain largely unaffected by the changing public policy landscape for human rights realization. To understand the relevance of human rights standards to water and sanitation practitioners, this article frames a research agenda to ensure that human rights aspirations lead to public policy reforms and public health outcomes.     

Effects of Extracurricular Participation on the Internalizing Problems and Intrapersonal Strengths of Youth in a System of Care

Although extracurricular participation has been linked to positive youth outcomes in the general population, no research to date has examined benefits for youth diagnosed with mental health challenges. Youth in systems of care (SOCs) receive a variety of services and supports that could help them capitalize on this potential for positive development, such as access to flexible funding to support recreational interests. However, research has not examined the degree to which the increased community involvement (e.g., extracurricular participation) sought in SOCs contributes to improved outcomes. This study addresses these gaps by investigating the relationships between both average and increased extracurricular participation frequency and breadth and internalizing problems and intrapersonal strengths among SOC youth. Findings revealed that, on average, higher frequency of youth participation was associated with higher intrapersonal strengths and lower internalizing problems. Increases in participation frequency were also associated with increased strengths and decreased internalizing problems. These findings suggest that efforts to implement supports for increasing extracurricular participation of SOC youth could improve their psychosocial outcomes beyond the benefits yielded via formal services. Taken together, these results provide support for advocacy efforts to integrate youth with mental health challenges into existing extracurriculars and to create new extracurricular opportunities.     

Willingness to Use ADHD Self-Management: Mixed Methods Study of Perceptions by Adolescents and Parents

Little is known about perceptions surrounding self-management for attention deficit hyperactivity disorder (ADHD), although such interventions appear commonly used and are considered essential components of the chronic care model. Our research is part of a mixed methods study that followed students at high and low risk for ADHD over 11 years. During the final study years, area-representative samples of 148 adolescents (54.8 % participation; 97 ADHD high-risk group; 51 low-risk peers) and 161 parents (59.4 % participation; 108 parents of high-risk adolescent; 53 parents of low-risk peer) completed a cross-sectional survey on community-identified self-management interventions for ADHD (activity outlets, sleep regulation, dietary restriction, homework help, family rules, and prayer). Respondents also answered open-ended questions addressing undesirable self-management effects, which were analyzed using grounded theory methods. High-risk adolescents expressed significantly lower willingness towards all self-management interventions than did adult respondents, except for increased activity outlets. They also reported lower receptivity towards sleep regulation and dietary restriction than did their low-risk peer group. No gender or race differences in self-management willingness were found, except for higher receptivity to prayer in African American respondents. Cost, perceived ineffectiveness, disruptions to routines, causation of interpersonal conflicts, and reduced future self-reliance were seen as potential undesirable effects. Findings suggest that activity-based ADHD interventions appear particularly acceptable across all demographic and risk groups, unlike sleep regulation and dietary approaches. Further research on self-care effectiveness is needed to incorporate adolescents’ viewpoints about ADHD self-management, as interventions may be acceptable to adults, but resisted by adolescents.     

Reducing Social Stress in Urban Adolescents with Peer Network Counseling

Increased social stress in the context of peer interactions is associated with multiple negative health outcomes, including substance use. Addressing social stress could provide protective effects for adolescents who are particularly vulnerable to peer-based issues such as loneliness and perceived isolation. Toward this end, we examined the efficacy of a 20-min substance use intervention named peer network counseling to reduce social stress with 119 urban adolescents. Adolescents presenting at primary care clinics were randomized into treatment or control conditions and followed for 6 months. Utilizing a repeated measures general linear model, we examined the effects of peer network counseling while controlling for race, gender, age, depression symptoms, and substance use (alcohol, marijuana). At 6 months the peer network counseling condition decreased social stress compared to controls (p?<?0.05). A linear mixed-effects moderation model revealed that peer network counseling temporarily moderated the effect of alcohol use, but not for marijuana or heavy alcohol use. Peer network counseling seems to reduce social stress, which suppresses alcohol use among peer network counseling participants in the short term. These promising findings appear to support the efficacy of peer network counseling in reducing social stress, which can moderate alcohol use among urban adolescents.     

Engagement in Group Psychotherapy Among Marginalized Individuals With Hepatitis C

This article examines an innovative psychoeducational group model at a community-based hepatitis C treatment program in Toronto, Canada. Group support is increasingly used as part of community-based, interdisciplinary approaches to addressing the complex psychosocial needs and barriers to care of individuals living with and/or undergoing treatment for hepatitis C. This article articulates the theoretical framework and details of one such group model. It also examines group engagement and outcomes using data collected over three group cycles. Psychotherapeutic engagement was higher than might be anticipated for a highly marginalized population. Specifically, group cohesion measures were equivalent or higher compared to norms for other support/psychotherapy groups. This study suggests that individuals with complex psychosocial issues have the ability to engage meaningfully in group therapy.     

To harvest,procure, or receive? Organ transplantation metaphors and the technological imaginary

Theoretical Medicine and Bioethics - One must technologize bodies to conceive of organ transplantation. Organs must be envisioned as replaceable parts, serving mechanical functions for the workings...