St Mary's University College

The analysis of spoken language requires a principled way of dividing transcribed data into units in order to assess features such as accuracy and complexity. If such analyses are to be comparable across different studies, there must be agreement on the nature of the unit, and it must be possible to apply this unit reliably to a range of different types of speech data. There are a number of different units in use, the various merits of which have been discussed by Crookes (1990). However, while these have been used to facilitate the analysis of spoken language data, there is presently no comprehensive, accessible definition of any of them, nor are detailed guides available on how to identify such units in data sets. Research reports tend to provide simplistic two-line definitions of units exemplified, if at all, by unproblematic written examples. These are inadequate when applied to transcriptions of complex oral data, which tend not to lend themselves easily to a clear division into units. This paper was motivated by the need each of the three authors felt for a reliable and comprehensively defined unit to assist with the analysis of a variety of recordings of native and non-native speakers of English. We first discuss in very general terms the criteria according to which such a unit might be selected. Next, we examine the main categories of unit which have been adopted previously and provide a justification for the particular type of unit that we have chosen. Focusing on this unit, we identify a number of problems which are associated with the definition and exemplification of units of this type, and give examples of the awkward cases found in actual data. Finally we offer a definition of our unit, the Analysis of Speech Unit (AS-unit), providing adequate detail to address the problematic data analyses we have illustrated.

Sleep is known to be an important component of recovery from training, yet little is known about the quality and quantity of sleep achieved by elite athletes. The aim of the present study was to quantify sleep in elite athletes using wristwatch actigraphy. Individual nights of sleep from a cohort of Olympic athletes (n = 47) from various sports were analysed and compared to non-athletic controls (n = 20). There were significant differences between athletes and controls in all measures apart from 'time asleep' (p = 0.27), suggesting poorer characteristics of sleep in the athlete group. There was a significant effect of gender on 'time awake' (mean difference: 12 minutes higher in males; 95% likely range: 3 to 21 minutes) and 'sleep efficiency' (mean difference: 2.4 lower in males; 95% likely range: 0.1 to 4.8). Athletes showed poorer markers of sleep quality than an age and sex matched non-athletic control group (Sleep efficiency: 80.6 ± 6.4% and 88.7 ± 3.6%, respectively. Fragmentation Index: 36.0 ± 12.4 and 29.8 ± 9.0, respectively) but remained within the range for healthy sleep. This descriptive study provides novel data for the purpose of characterising sleep in elite athletes.

This article presents a study examining how narrative structure and narrative complexity might influence the performance of second language learners. Forty learners of English in London and sixty learners in Teheran were asked to retell cartoon stories from picture prompts. Each performed two of four narrative tasks that had different degrees of narrative structure (loose or tight) and of storyline complexity (with or without background events). Results support the findings of previous research that tight task structure is connected to increased accuracy and that narratives involving background information give rise to more complex syntax. A comparison of the data from the London and Teheran cohorts showed that the learners in London used significantly more complex syntax and diverse vocabulary even though they did not differ from the Teheran learners in other performance dimensions.

Abstract Monitoring the impacts of anthropogenic threats and interventions to mitigate these threats is key to understanding how to best conserve biodiversity. Ecologists use many different study designs to monitor such impacts. Simpler designs lacking controls (e.g. Before–After (BA) and After) or pre‐impact data (e.g. Control–Impact (CI)) are considered to be less robust than more complex designs (e.g. Before–After Control‐Impact (BACI) or Randomized Controlled Trials (RCTs)). However, we lack quantitative estimates of how much less accurate simpler study designs are in ecology. Understanding this could help prioritize research and weight studies by their design's accuracy in meta‐analysis and evidence assessment. We compared how accurately five study designs estimated the true effect of a simulated environmental impact that caused a step‐change response in a population's density. We derived empirical estimates of several simulation parameters from 47 ecological datasets to ensure our simulations were realistic. We measured design performance by determining the percentage of simulations where: (a) the true effect fell within the 95% Confidence Intervals of effect size estimates, and (b) each design correctly estimated the true effect's direction and magnitude. We also considered how sample size affected their performance. We demonstrated that BACI designs performed: 1.3–1.8 times better than RCTs; 2.9–4.2 times versus BA; 3.2–4.6 times versus CI; and 7.1–10.1 times versus After designs (depending on sample size), when correctly estimating true effect's direction and magnitude to within ±30%. Although BACI designs suffered from low power at small sample sizes, they outperformed other designs for almost all performance measures. Increasing sample size improved BACI design accuracy, but only increased the precision of simpler designs around biased estimates. Synthesis and applications . We suggest that more investment in more robust designs is needed in ecology since inferences from simpler designs, even with large sample sizes may be misleading. Facilitating this requires longer‐term funding and stronger research–practice partnerships. We also propose ‘accuracy weights’ and demonstrate how they can weight studies in three recent meta‐analyses by accounting for study design and sample size. We hope these help decision‐makers and meta‐analysts better account for study design when assessing evidence.

The papers presented here are the result of a symposium, Roman Imperialism: Post-Colonial Perspectives, held at the University of Leicester in November 1994. The symposium brought together scholars from interrelated fields (including Roman Archaeology, Ancient History, and Classical Studies) who, within their own areas, were using analytical tools drawn from post-colonial theory. Our aims as a group were two-fold. First, we wanted to explore some of the central themes of post-colonial theory, and their implications for the study of the Roman Empire. These are, necessarily, themes which particularly concern Roman scholars who have grown up in what Martin Millett (1990a) calls the ‘post imperial age’; and most of those present at the symposium belonged to the first (and the second) generation of ‘post imperial’ Roman scholars. Our second aim was to look reflexively at Roman studies in the late-twentieth century. In what ways, we asked, is our position within the ‘post imperial’ condition causing us to reassess not only Roman imperialism, but the epistemological basis of our own discipline (the study of the Roman Empire), which developed in the context of Western imperialism? [Taken from the introduction]

CONTEXT: The Star Excursion Balance Test (SEBT) is a widely accepted method of assessing dynamic postural stability. The Y Balance Test (YBT) is a commercially available device for measuring balance that uses 3 (anterior, posteromedial, and posterolateral) of the 8 SEBT directions and has been advocated as a method for assessing dynamic balance. To date, no studies have compared reach performance in these tests in a healthy population. OBJECTIVE: To determine whether any differences exist between reach distance performance for the anterior, posteromedial, and posterolateral directions of the SEBT and the YBT. DESIGN: Descriptive laboratory study. SETTING: University motion analysis laboratory. PATIENTS OR OTHER PARTICIPANTS: A total of 20 healthy active male participants (age = 22.50 ± 3.05 years, height = 1.78 ± 0.82 m, weight = 79.48 ± 11.32 kg, body mass index = 24.96 ± 2.56 kg/m²). INTERVENTION(S): Participants carried out 3 trials in each reach direction on each leg on the SEBT and the YBT a minimum of 1 week apart. MAIN OUTCOME MEASURE(S): The means of the 3 trials in each direction on each leg on both tests were calculated. Data were collected after 4 practice trials in each direction. Paired t tests and Bland-Altman plots were used to compare reach distances between the SEBT and the YBT. RESULTS: Participants reached farther in the anterior direction on the SEBT than on the YBT. No differences were observed in the posteromedial and posterolateral directions. CONCLUSIONS: Differing postural-control strategies may be used to complete these tasks. This finding has implications for the implementation and interpretation of these dynamic balance tests.

The ability to repeatedly produce a high-power output or sprint speed is a key fitness component of most field and court sports. The aim of this study was to evaluate the validity and reliability of eight different approaches to quantify this parameter in tests of multiple-sprint performance. Ten physically active men completed two trials of each of two multiple-sprint running protocols with contrasting recovery periods. Protocol 1 consisted of 12 x 30-m sprints repeated every 35 seconds; protocol 2 consisted of 12 x 30-m sprints repeated every 65 seconds. All testing was performed in an indoor sports facility, and sprint times were recorded using twin-beam photocells. All but one of the formulae showed good construct validity, as evidenced by similar within-protocol fatigue scores. However, the assumptions on which many of the formulae were based, combined with poor or inconsistent test-retest reliability (coefficient of variation range: 0.8-145.7%; intraclass correlation coefficient range: 0.09-0.75), suggested many problems regarding logical validity. In line with previous research, the results support the percentage decrement calculation as the most valid and reliable method of quantifying fatigue in tests of multiple-sprint performance.

Herbs and spices have been used for both culinary and medicinal purposes for centuries. Over the last decade, research into their role as contributors of dietary polyphenols, known to possess a number of properties associated with reducing the risk of developing chronic non-communicable diseases, has increased. However, bearing in mind how these foods are consumed, normally in small quantities and in combination with other foods, it is unclear what their true benefit is from a health perspective. The aim of this review is to use the literature to discuss how preparative and digestive processes, bioavailability and interactions between foods may influence the bioactive properties of these foods, and whether or not polyphenols are responsible for these properties. Furthermore, this review aims to highlight the challenges that need to be addressed so as to determine the true benefits of these foods and the mechanisms of action that underpin their purported efficacy.

Unprecedented rates of introduction and spread of non-native species pose burgeoning challenges to biodiversity, natural resource management, regional economies, and human health. Current biosecurity efforts are failing to keep pace with globalization, revealing critical gaps in our understanding and response to invasions. Here, we identify four priority areas to advance invasion science in the face of rapid global environmental change. First, invasion science should strive to develop a more comprehensive framework for predicting how the behavior, abundance, and interspecific interactions of non-native species vary in relation to conditions in receiving environments and how these factors govern the ecological impacts of invasion. A second priority is to understand the potential synergistic effects of multiple co-occurring stressors— particularly involving climate change—on the establishment and impact of non-native species. Climate adaptation and mitigation strategies will need to consider the possible consequences of promoting non-native species, and appropriate management responses to non-native species will need to be developed. The third priority is to address the taxonomic impediment. The ability to detect and evaluate invasion risks is compromised by a growing deficit in taxonomic expertise, which cannot be adequately compensated by new molecular technologies alone. Management of biosecurity risks will become increasingly challenging unless academia, industry, and governments train and employ new personnel in taxonomy and systematics. Fourth, we recommend that internationally cooperative biosecurity strategies consider the bridgehead effects of global dispersal networks, in which organisms tend to invade new regions from locations where they have already established. Cooperation among countries to eradicate or control species established in bridgehead regions should yield greater benefit than independent attempts by individual countries to exclude these species from arriving and establishing.

This article argues that a native‐speaker baseline is a neglected dimension of studies into second language (L2) performance. If we investigate how learners perform language tasks, we should distinguish what performance features are due to their processing an L2 and which are due to their performing a particular task. Having defined what we mean by “native speaker,” we present the background to a research study into task features on nonnative task performance, designed to include native‐speaker data as a baseline for interpreting nonnative‐speaker performance. The nonnative results, published in this journal ( Tavakoli & Foster, 2008 ) are recapitulated and then the native‐speaker results are presented and discussed in the light of them. The study is guided by the assumption that limited attentional resources impact on L2 performance and explores how narrative design features—namely complexity of storyline and tightness of narrative structure—affect complexity, fluency, accuracy, and lexical diversity in language. The results show that both native and nonnative speakers are prompted by storyline complexity to use more subordinated language, but narrative structure had different effects on native and nonnative fluency. The learners, who were based in either London or Tehran, did not differ in their performance when compared to each other, except in lexical diversity, where the learners in London were close to native‐speaker levels. The implications of the results for the applicability of Levelt's model of speaking to an L2 are discussed, as is the potential for further L2 research using native speakers as a baseline.

Abstract With ambitions to become a hub of global commerce, a top tourist destination and a shopping Mecca—a New York/Las Vegas/Miami rolled into one—Dubai has been spending billions of dollars to build an astonishing modern city nearly from scratch in a mere 15 years. To date some $100 billion worth of real estate under construction or in the pipeline continues the boom. Combining the involvement of local businesses and innovative strategies of urban marketing with headline catching projects, Dubai has set out to transform its urban landscape, and its image. Ambitious mixed-use urban developments featuring luxury residences, hotels and office blocks, huge shopping malls and imaginative entertainment complexes are rapidly changing the face of Dubai emirate and are putting the Dubai property market on the world stage. The catalyst for much of this expansion, this paper argues, has been the emirate's decision to allow non-nationals to purchase freehold property. The paper concludes by questioning the sustainability of this growth but does not attempt to offer any answers, given its rollercoaster nature.

Background This paper compares the findings from a recent, large-scale UK-wide survey of primary teachers' confidence in teaching science with the results of a seminal report carried out 10 years ago by Wynne Harlen in Scotland. Recent reports from across the UK have indicated there are still serious concerns relating to primary teachers' confidence and ability to teach science effectively. Purpose The main research aims were to provide a clear, evidence-based analysis of the current issues facing primary science in the UK; explore primary teachers' confidence in science teaching and to evaluate the impact of science initiatives taking place in UK primary schools. Sample The sample for the study comprised: telephone interviews with 300 primary teachers from all UK regions; seven focus groups of primary teachers held in England, Northern Ireland, Scotland and Wales to further explore the issues raised in the telephone interviews; and workshops from a two-day conference of 75 stakeholders in primary science from all UK regions (approximately half the delegates were teachers; also represented were teacher educators (initial and continuing professional development), curriculum developers and policy-makers). In addition, 100 teacher education institutions were surveyed in relation to their participation in primary science initiatives. Design and methods The methodology for both studies comprised qualitative and quantitative elements (see sample details, above). All data were collected between June and September 2004. Results The findings indicated that there are improvements in some areas of primary teachers' confidence in teaching science. However, the study showed that half of the teachers surveyed cited lack of teacher confidence and ability to teach science as the current issue of major concern in primary science. This paper also reports on some of the professional development initiatives carried out by higher education institutions in primary science. Conclusions The paper concludes that there has been some progress in developing teacher confidence in primary science over the past 10 years. However, the situation is still critical for all stakeholders. Half of the teachers surveyed in the UK for the present study identified lack of teacher confidence and ability to teach science as the major issue of concern in primary science. Higher education institutions need to enhance the preparation of new primary teachers to ensure that they are all confident and effective teachers of science. They could also increase their partnership work with schools and other continuing professional development (CPD) providers in relation to primary science. The evidence demonstrates clearly that there is a need for substantially increasing science professional development for primary teachers. It also shows that such professional development could be more effectively targeted at specific aspects of science teaching that are more challenging for teachers. Further, the study shows that professional development in science works, in that teachers who have experienced science continuing professional development (CPD) are much more confident to teach science than those who have not.

PURPOSE: The aim of this study was to examine the effects of caffeine supplementation on multiple sprint running performance. METHODS: Using a randomized double-blind research design, 21 physically active men ingested a gelatin capsule containing either caffeine (5 mg x kg(-1) body mass) or placebo (maltodextrin) 1 h before completing an indoor multiple sprint running trial (12 x 30 m; repeated at 35-s intervals). Venous blood samples were drawn to evaluate plasma caffeine and primary metabolite concentrations. Sprint times were recorded via twin-beam photocells, and earlobe blood samples were drawn to evaluate pretest and posttest lactate concentrations. Heart rate was monitored continuously throughout the tests, with RPE recorded after every third sprint. RESULTS: Relative to placebo, caffeine supplementation resulted in a 0.06-s (1.4%) reduction in fastest sprint time (95% likely range = 0.04-0.09 s), which corresponded with a 1.2% increase in fatigue (95% likely range = 0.3-2.2%). Caffeine supplementation also resulted in a 3.4-bpm increase in mean heart rate (95% likely range = 0.1-6.6 bpm) and elevations in pretest (+0.7 mmol x L(-1); 95% likely range = 0.1-1.3 mmol x L(-1)) and posttest (+1.8 mmol x L(-1); 95% likely range = 0.3-3.2 mmol x L(-1)) blood lactate concentrations. In contrast, there was no significant effect of caffeine supplementation on RPE. CONCLUSION: Although the effect of recovery duration on caffeine-induced responses to multiple sprint work requires further investigation, the results of the present study show that caffeine has ergogenic properties with the potential to benefit performance in both single and multiple sprint sports.

In recent decades there has been a boom in international volunteer tourism, mainly in the form of the growth of gap-year companies offering placements, linked to conservation and community well-being goals. This paper makes two points: firstly, it argues that the growth of volunteer tourism is in part a product of the politics of the current period—the decline of grand narratives and the growth of ‘life political’ alternative forms of agency. Hence volunteer tourism, motivated by the impulse to ‘make a difference’, tells us something about the way in which development issues are being conceived of by idealistic young people who comprise the majority of volunteer tourists. Secondly, the paper takes issue with the view that today's volunteer tourists are part of a tradition of colonialism and neo-colonialism that projects western conceptions of modernization onto the Third World societies to the detriment of the latter. Rather, it is argued that the politics behind volunteer tourism is better characterized as a rejection of modernization as development in favour of a post-development influenced approach.

Antarctica is experiencing significant ecological and environmental change, which may facilitate the establishment of non-native marine species. Non-native marine species will interact with other anthropogenic stressors affecting Antarctic ecosystems, such as climate change (warming, ocean acidification) and pollution, with irreversible ramifications for biodiversity and ecosystem services. We review current knowledge of non-native marine species in the Antarctic region, the physical and physiological factors that resist establishment of non-native marine species, changes to resistance under climate change, the role of legislation in limiting marine introductions, and the effect of increasing human activity on vectors and pathways of introduction. Evidence of non-native marine species is limited: just four marine non-native and one cryptogenic species that were likely introduced anthropogenically have been reported freely living in Antarctic or sub-Antarctic waters, but no established populations have been reported; an additional six species have been observed in pathways to Antarctica that are potentially at risk of becoming invasive. We present estimates of the intensity of ship activity across fishing, tourism and research sectors: there may be approximately 180 vessels and 500+ voyages in Antarctic waters annually. However, these estimates are necessarily speculative because relevant data are scarce. To facilitate well-informed policy and management, we make recommendations for future research into the likelihood of marine biological invasions in the Antarctic region.

The aim of this study was to examine the effects of threat appraisal (perceived susceptibility to re-injury or retarded rehabilitation and perceived severity of injury) and coping appraisal (self-efficacy, treatment efficacy and outcome value), in the framework of Protection Motivation Theory (PMT), on compliance to a sports physiotherapist's prescribed modalities and rest. During extensive developmental work, a Sports Injury Rehabilitation Beliefs Survey was constructed with 19 items to assess the PMT components. Five compliance measures were developed from physiotherapist and patient surveys. Data from 62 subjects (68% female, mean +/- S.D. age 21.7 +/- 2.85 years, and involved in many recreational and competitive activities) were obtained from a single university-based sports injury clinic, in a prospective study. The study revealed that over half the subjects were subsequently non-compliant to some degree. Greater perceptions of both susceptibility to retarded rehabilitation and injury severity, at the first appointment, were related to subsequent non-compliant behaviour. Greater self-efficacy in the ability to perform prescribed rehabilitation modalities, stronger beliefs in the treatment efficacy, and higher value attached to rehabilitation, were all related to compliant behaviour. Compliance to restricted activity (or rest) was only related to greater perceptions of susceptibility. The findings provide some support for PMT in this context and offer a basis for designing sports therapist interventions which focus on threat and coping appraisal.

Now that videoconferencing is being widely used for the delivery of mass lectures between sites, there is concern that the quality of teaching and learning experienced, using this method of delivery, is not as good as that experienced in a traditional classroom situation. The study aimed to investigate this concern by using a research diary to collect information on classroom activities and cognitive outcomes which students at local and remote sites experienced over a ten–week period. The results indicated that remote site students did not experience the same quality of teaching and learning as local site students.

Evidence-based conservation relies on reliable and relevant evidence. Practitioners often prefer locally relevant studies whose results are more likely to be transferable to the context of planned conservation interventions. To quantify the availability of relevant evidence for amphibian and bird conservation we reviewed Conservation Evidence, a database of quantitative tests of conservation interventions. Studies were geographically clustered, and few locally conducted studies were found in Western sub-Saharan Africa, Russia, South East Asia, and Eastern South America. Globally there were extremely low densities of studies per intervention - fewer than one study within 2000 km of a given location. The availability of relevant evidence was extremely low when we restricted studies to those studying biomes or taxonomic orders containing high percentages of threatened species, compared to the most frequently studied biomes and taxonomic orders. Further constraining the evidence by study design showed that only 17–20% of amphibian and bird studies used reliable designs. Our results highlight the paucity of evidence on the effectiveness of conservation interventions, and the disparity in evidence for local contexts that are frequently studied and those where conservation needs are greatest. Addressing the serious global shortfall in context-specific evidence requires a step change in the frequency of testing conservation interventions, greater use of reliable study designs and standardized metrics, and methodological advances to analyze patchy evidence bases.

Building trust in science and evidence-based decision-making depends heavily on the credibility of studies and their findings. Researchers employ many different study designs that vary in their risk of bias to evaluate the true effect of interventions or impacts. Here, we empirically quantify, on a large scale, the prevalence of different study designs and the magnitude of bias in their estimates. Randomised designs and controlled observational designs with pre-intervention sampling were used by just 23% of intervention studies in biodiversity conservation, and 36% of intervention studies in social science. We demonstrate, through pairwise within-study comparisons across 49 environmental datasets, that these types of designs usually give less biased estimates than simpler observational designs. We propose a model-based approach to combine study estimates that may suffer from different levels of study design bias, discuss the implications for evidence synthesis, and how to facilitate the use of more credible study designs.

The purpose of the study was to investigate the current use of blood flow restriction (BFR) by practitioners during exercise/training. A questionnaire was developed and data were obtained from 250 participants, with 115 stating that they had prescribed BFR as an intervention. The most common exercise intervention used in combination with BFR was resistance exercise (99/115), followed by during passive (30/115) conditions, and during aerobic exercise (22/115). The main outcome measure for using the technique was to increase muscle mass (32.6%) followed by rehabilitation from injury (24.2%). Over half of respondents (57.4%) reported that they did not use the same cuff widths for the lower body and upper body, with varying final restriction pressures also being utilised during each different exercise modality. Most practitioners performed the technique for ~10 min each training session, 1-4 times per week. Eighty percent of practitioners rated the use of BFR as very good-excellent. The incidence rate of side effects was largest for delayed onset muscle soreness (39.2%), numbness (18.5%), fainting/dizziness (14.6%) and bruising (13.1%). These results indicate that the use of BFR training is widespread amongst practitioners; however, care should be taken to ensure that practice matches current research to ensure the safety of this technique.