Extracting Long-Term Patterns of Population Changes from Sporadic Counts of Migrant Birds

Declines of many North American birds are of conservation concern. Monitoring their population changes has largely depended on formally structured Breeding Bird Surveys, and Migration Monitoring Stations, although some use has been made of lists by birders. For almost 40 years, birders have kept daily counts of migrant landbirds during visits to Seal Island, of Nova Scotia's south tip. Here we present results for several common migrants using day-counts made between August 15 and November 15. Most existing analyses have used linear models to extract trends and other variables from such long-term data sets. Instead we applied Generalized Additive Models (GAMs) to extract the continuous trend functions and patterns of influence of observer number, wind speed, wind direction on count nights and prior nights, and moon phase. The results suggest that GAMs are a powerful way of dealing with such "noisy" data of the sort collected by birders in their recreational pursuits. In addition, it is possible to analyse groups of species (related taxonomically or ecologically) simultaneously with the potential of determining overall more general trends.Seal Island, Generalized additive models, Count data, Overdisperson

Banishing the control homunculi in studies of action control and behaviour change

types: ReviewDOI and citation will be added to the record once they are known.© 2014 Association for Psychological ScienceFor centuries, human self-control has fascinated scientists and nonscientists alike. Current theories often attribute it to an executive control system. But even though executive control receives a great deal of attention across disciplines, most aspects of it are still poorly understood. Many theories rely on an ill-defined set of ‘homunculi’ doing jobs like 'response inhibition' or ‘updating’ without explaining how they do so. Furthermore, it is not always appreciated that control takes place across different time-scales. These two issues hamper major advances. Here we focus on the mechanistic basis for the executive control of actions. We propose that at the most basic level, action control depends on three cognitive processes: signal detection, action selection, and action execution. These processes are modulated via error-correction or outcome-evaluation mechanisms, preparation, and task rules maintained in working- and long-term memory. We also consider how executive control of actions becomes automatised with practice, and how people develop a control network. Finally, we discuss how the application of this unified framework in clinical domains can increase our understanding of control deficits and provide a theoretical basis for the development of novel ‘behavioural change’ interventions

Barriers to Exercise and Nutrition for Special Olympics Athletes

Problem People with intellectual disability (ID) have higher rates of obesity. Special Olympics Vermont (SOVT) athletes compete in sports events throughout the year. Athletes may lose fitness between seasons. Their nutrition habits remain unknown. •Barriers to exercise and nutrition remain unknown. Goal We were tasked with designing a successful exercise and nutrition program for SOVT athletes.https://scholarworks.uvm.edu/comphp_gallery/1215/thumbnail.jp

Cryogenic STM in 3D vector magnetic fields realized through a rotatable insert

We acknowledge funding from EPSRC (EP/L505079/1 and EP/I031014/1).Spin-polarized scanning tunneling microscopy (SP-STM) performed in vector magnetic fields promises atomic scale imaging of magnetic structure, providing complete information on the local spin texture of a sample in three dimensions. Here, we have designed and constructed a turntable system for a low temperature STM which in combination with a 2D vector magnet provides magnetic fields of up to 5 T in any direction relative to the tip-sample geometry. This enables STM imaging and spectroscopy to be performed at the same atomic-scale location and field-of-view on the sample, and most importantly, without experiencing any change on the tip apex before and after field switching. Combined with a ferromagnetic tip, this enables us to study the magnetization of complex magnetic orders in all three spatial directions.PostprintPeer reviewe

Measuring serial correlation of residuals in econometric relations

The inter-relationship of economic variables, such as incomes, employment and the ruling rate of interest, is a popularly accepted fact. "Econometric relations" arise when these inter-relationships are quantified, and expressed in mathematical form. An example is the simple set of simultaneous equations arising from the elementary economic analysis of savings, investment, consumption and national income

Exercise, mood, self-efficacy, and social support as predictors of depressive symptoms in older adults : Direct and interaction effects

Background: Depression is a chronic condition that affects up to 15% of older adults. The healthogenic effects of regular exercise are well established, but it is still unclear which exercise-related variables characterise the antidepressant effects of exercise. Thus, the purpose of this study was to examine the extent to which exercise-related variables (exercise behaviour, exercise-induced mood, exercise self-efficacy, and social support) can predict depressive symptoms in a cohort of community-dwelling older adults. Methods: This study employed a cross-sectional analysis of questionnaire data from a sample of 586 community-dwelling older Australians aged 65 to 96 years old. Participants completed the Center for Epidemiologic Studies Depression Scale, modified CHAMPS Physical Activity Questionnaire for Older Adults, Four-Dimension Mood Scale, Self-Efficacy for Exercise Scale, and Social Provisions Scale - Short Form. Bivariate correlations were performed, and hierarchical multiple regression was subsequently used to test the regression model. Results: Exercise behaviour, exercise-induced mood, exercise self-efficacy, and social support were all negatively associated with depressive symptoms (r = -0.20 to -0.56). When the variables were entered as predictors into the hierarchical multiple regression model, social support was the strongest predictor of depressive symptoms (beta = -0.42), followed by exercise-induced mood (beta = -0.23), and exercise self-efficacy (beta = -0.07). Exercise behaviour did not explain any additional variance in depressive symptoms. A modest interaction effect was also observed between exercise-induced mood and social support. Conclusion: These findings indicate that social support is the strongest predictor of depressive symptomology in community-dwelling older adults, particularly when combined with positive exercise-induced mood states. When addressing the needs of older adults at risk of depression, healthcare professionals should consider the implementation of exercise programmes that are likely to benefit older adults by improving mood, enhancing self-efficacy, and building social support

Soccer academy practitioners’ perceptions and application of bio-banding

The primary aims of this study were to examine the application of maturity status bio-banding within professional soccer academy programmes and understand the methods employed, the intended objectives, and the potential barriers to bio-banding. Using a mixed method design, twenty-five professional soccer academy practitioners, completed an online survey designed to examine coaches perceived influence of maturation on practice, perceptions of bio-banding, their application of bio-banding and their perceived barriers to bio-banding implementation. Seven participants who had experience with, or knowledge of, the bio-banding process within an academy youth soccer setting were recruited to complete a semi-structure interview and the interview schedule was informed by common themes within the survey data. Frequency and percentages of responses for individual items were calculated. Interview data was transcribed and were analysed using a directed approach to content analysis with combination of inductive and deductive approaches being used to identify meaning units which were subsequently grouped together to form emergent categories (lower-order themes) based on their similarity to each other and distinction from other categories. The main findings were that (1) there is consensus among the practitioners that the individual effect of maturation impacts their ability to accurately assess the soccer competencies, (2) the majority (80%) of the sample had implemented bio-banding, with practitioners showing a clear preference for using the Khamis and Roche method to bio-band players, with the greatest perceived benefit being during maturity-matched formats, specifically for late or post-PHV players, (3) Practitioners perceived that bio-banding enhances their ability to assess academy soccer players, and (4) practitioners who have used bio-banding believe that the method is an effective way of enhancing the perception of challenge, and provides psycho-social benefits. For the implementation of bio-banding to succeed, a collaborative approach to its implementation should be taken to permit the successful embedment of bio-banding within the typical training schedules across the adolescent phase of the player development pathway