How explicable are differences between reviews that appear to address a similar research question? A review of reviews of physical activity interventions

Background Systematic reviews are promoted as being important to inform decision-making. However, when presented with a set of reviews in a complex area, how easy is it to understand how and why they may differ from one another? Methods An analysis of eight reviews reporting evidence on effectiveness of community interventions to promote physical activity. We assessed review quality and investigated overlap of included studies, citation of relevant reviews, consistency in reporting, and reasons why specific studies may be excluded. Results There were 28 included studies. The majority (n = 22; 79%) were included only in one review. There was little cross-citation between reviews (n = 4/28 possible citations; 14%). Where studies appeared in multiple reviews, results were consistently reported except for complex studies with multiple publications. Review conclusions were similar. For most reviews (n = 6/8; 75%), we could explain why primary data were not included; this was usually due to the scope of the reviews. Most reviews tended to be narrow in focus, making it difficult to gain an understanding of the field as a whole. Conclusions In areas where evaluating impact is known to be difficult, review findings often relate to uncertainty of data and methodologies, rather than providing substantive findings for policy and practice. Systematic ‘maps’ of research can help identify where existing research is robust enough for multiple in-depth syntheses and also show where new reviews are needed. To ensure quality and fidelity, review authors should systematically search for all publications from complex studies. Other relevant reviews should be searched for and cited to facilitate knowledge-building

WATERMAN FUND ESSAY WINNER: The Cage Canyon: I am Holding a Piece of the Wild in My Hands, and She Wants Nothing to Do with Me

The winner of the seventh Waterman Fund Essay Contest shows what has happened to wolves in the West: most wolves alive today have never learned to hunt because they were bred in captivity. They are a species that has lost its wildness but can never be tamed

Light drinking during pregnancy : still no increased risk for socioemotional difficulties or cognitive deficits at 5 years of age?

Background This study examines the relationship between light drinking during pregnancy and the risk of socioemotional problems and cognitive deficits at age 5 years. Methods Data from the nationally representative prospective UK Millennium Cohort Study (N=11 513) were used. Participants were grouped according to mothers' reported alcohol consumption during pregnancy: never drinker; not in pregnancy; light; moderate; heavy/binge. At age 5 years the strengths and difficulties questionnaire (SDQ) and British ability scales (BAS) tests were administered during home interviews. Defined clinically relevant cut-offs on the SDQ and standardised scores for the BAS subscales were used. Results Boys and girls born to light drinkers were less likely to have high total difficulties (for boys 6.6% vs 9.6%, OR=0.67, for girls 4.3% vs 6.2%, OR=0.69) and hyperactivity (for boys 10.1% vs 13.4%, OR=0.73, for girls 5.5% vs 7.6%, OR=0.71) scores compared with those born to mothers in the not-in-pregnancy group. These differences were attenuated on adjustment for confounding and mediating factors. Boys and girls born to light drinkers had higher mean cognitive test scores compared with those born to mothers in the not-in-pregnancy group: for boys, naming vocabulary (58 vs 55), picture similarities (56 vs 55) and pattern construction (52 vs 50), for girls naming vocabulary (58 vs 56) and pattern construction (53 vs 52). Differences remained statistically significant for boys in naming vocabulary and picture similarities. Conclusions At age 5 years cohort members born to mothers who drank up to 1–2 drinks per week or per occasion during pregnancy were not at increased risk of clinically relevant behavioural difficulties or cognitive deficits compared with children of mothers in the not-in-pregnancy group

Brexit uncertainty: different groups of migrants had similar experiences of and responses to uncertainty

Kelly Hall and Jenny Phillimore draw on 55 qualitative interviews to explore how three groups of EU migrants, entrepreneurs, Somali onward migrants and British retirees in Spain, respond to Brexit-related uncertainty

Can LinkedIn and Academia.edu Enhance Access to Open Repositories?

The deployment of institutional repository services has focussed on the development of services for managing content within the organisation or by a trusted agency. At the same time we have seen developments to support management of the use of metadata to maximize access to content hosted in repositories. Related technical approaches, such as 'cool URIs' can also make content more discoverable by search engines such as Google. In parallel we are witnessing the increasing take-up of a range of third-party services such as LinkedIn and Academia which are being used by researchers to publish information related to their professional activities, including details of their research publications. The paper provides evidence which suggests that personal use of such services can increase the number of downloads by increasing SEO (Search Engine Optimisation) rankings through inbound links from highly ranked web sites. A survey of use of such services across Russell Group universities shows the popularity of a number of social media services. In the light of existing usage of these services this paper proposes that institutional encouragement of their use by researchers may generate increased accesses to institutional research publications at little cost to the institution. This paper concludes by describing further work which is planned in order to investigate the SEO characteristics of institutional repositories

Test Plan for the Technology Maturation of Supersonic Inflatable Aerodynamic Decelerators

Supersonic inflatable aerodynamic decelerators (IADs) are drag devices intended to be deployed at high Mach numbers. In the application considered here they assist in the descent and landing of spacecraft on Mars. Although promising, present IAD technology is not yet sufficiently mature for use in the near future. This paper describes a technology maturation plan for tension cone IADs using subscale test articles to reduce development costs. As envisioned, the proposed test plan includes three phases: wind tunnel tests (subsonic), unpowered high-altitude flight tests (transonic), and powered high-altitude tests (supersonic). This test plan is based on a building block approach in which successful completion of each phase adds to the understanding of the behavior of IADs and reduces the risk of the subsequent, more expensive phases. By properly scaling the IADs, test articles of the same size and nearly the same construction can be used for all three phases. The final phase is a dynamically scaled flight test with IAD deployment at the same Mach number as the full-scale vehicle on Mars. Two full-scale example cases are presented: one for a single-stage system (15 m dia. IAD to subsonic retropropulsion), and another for a two-stage system (10.5 m dia. IAD to subsonic parachute). Using scale factors of 0.333 and 0.476 yield subscale test IADs of 5 m dia. The dynamically scaled powered flight test starts at Mach 4 and an altitude of 33.5 km. Existing balloons and rocket motors are shown to be adequate to meet the required test conditions

Exploring the experiences of Indigenous women who participated in a 'follow-through' journey within a Bachelor of Midwifery program

[Extract] Summary: • The women interviewed in our study reported the many benefits of having an Indigenous midwifery student provide them with Continuity of Care • Increasing the number of Aboriginal & Torres Strait Islander midwives is essential to improving health outcomes for Aboriginal & Torres Strait Islander familie