6591 research outputs found
Sort by
Rubus allegheniensis
No full textWittich Township, AR, USAhttps://orc.library.atu.edu/rubus/1030/thumbnail.jp
Silene virginica
No full textWhite River Township, AR, USAhttps://orc.library.atu.edu/silene/1003/thumbnail.jp
Viola bicolor
No full textS Elmira Avenue, Russellville, AR, UShttps://orc.library.atu.edu/viola/1012/thumbnail.jp
Careful what you say to yourself: Exploring self-talk and youth tennis performance via hierarchical linear modeling
No full textResearchers have examined self-talk and performance in tennis matches, but the current understanding of speech-to-performance associations in tennis is hindered by conflicting evidence from self-report and observation, and by the use of relatively simple statistical analyses that fail to account for speech and performance events being nested within both points and individuals over time throughout a tennis match. In the current study, 28 youth tennis players (Mage = 12 years) were observed, and their speech and performance coded with the Self-Talk and Gestures Rating Scale. The relation between self-talk and performance was measured on the same point (K), as well as on the subsequent point (K+1). Bivariate (non-nested) analyses supported a concurrent, but not a predictive relation between self-talk and performance, consistent with prior work. With multivariate, hierarchical linear modeling that accounts for total points played in a set within person, and player behavior on the prior point, we found that positive and negative self-talk were strongly related to concurrent point performance, and to a less extent, to subsequent K+1 point performance. The occurrence of positive self-talk on point K appeared to increase the odds of winning the subsequent point compared to when positive self-talk talk did not appear, but the margin was small. Researchers should continue to observe self-talk in athletes, as well as examine multilevel speech-to-performance associations, especially when data are gathered within naturalistic settings in real time. © 202
Environmental and Fish Assemblage Contrasts in Blackwater and Clearwater Streams
No full textWe compared 15 blackwater and clearwater streams in coastal drainages of Alabama by quantifying fish assemblages and associated environmental conditions across multiple seasons and characterizing potential relationships using multivariate statistical approaches. Clearwater stream channels tended to be deeper, to have sandier substrates, and to have higher dissolved oxygen concentrations than blackwater streams. In contrast, blackwater streams showed higher dissolved organic carbon levels and higher benthic macroinvertebrate densities. Discriminant function analysis based on environmental and invertebrate data resulted in 90% discrimination between the two stream types. Nonmetric multidimensional scaling (NMDS) of seasonal fish assemblages indicated separation by stream type, with no overlap in fish assemblages of blackwater and clearwater streams in any season, and 12 (39%) of the 31 species captured were indicative of stream type. A suite of environmental and biological variables representing invertebrate density, discharge, stream size, water chemistry, and land use was correlated with NMDS axes separating fish assemblages by stream type. Fish traits were somewhat distinctive between stream types, as there were unique lie-in-wait predators and short-lived species in each stream type. A fourth-corner analysis indicated potential linkages between fishes preferring woody substrate and stream type, further suggesting that stream type may explain fish functional structure. These results emphasize the need to consider these coastal systems as biotically unique ecosystem types in conservation plans as well as to focus more attention on better understanding the diversity patterns in headwater streams within the Coastal Plains region
Obesity and bankruptcy: Evidence from US counties
No full textUsing annual county-level data on nonbusiness bankruptcy for the period 2005–2017 and obesity for the period 2004–2016, this paper finds that higher obesity rates are associated with higher bankruptcy rates beyond what can be explained by local economic conditions and demographic characteristics, state-specific economic shocks, and county-specific time trends. The magnitude suggests that a one-percentage point increase in the obesity rate is associated with a 0.02−0.03 increase (or a 1.0 percent increase) in Chapter 7 bankruptcy rates per 1000 residents and a 0.02−0.04 increase (or a 3–4 percent increase) in Chapter 13 bankruptcy rates per 1000 residents
The Effect of Activity Trackers on Meeting Arkansas State Standards. Research Quarterly for Exercise and Sport (Peer-Reviewed Abstract)
No full textWho Has the Right-of-way? Negotiating Environmental and Economic Impacts of Off-highway Vehicle Use in Eastern Kentucky
No full textOutdoor recreation entails a careful balance between environmental impact and economic impact, particularly in rural Appalachian transitional economies. Outdoor recreation annually brings millions of dollars into rural areas in Central Appalachia by utilizing the natural features of the region for recreation. However, uneven development has fomented long-standing environmental injustices as extraction industries utilize unparalleled control over the natural environment and its use. In this article, the researchers examine Kentucky off-highway vehicle (OHV) use patterns as they pertain to the environment alongside their generalized household economic expenditures per trip. Off-highway vehicle users represent a legitimate claim to public land use, and thus findings of this article reinforce the need for caution in balancing the economic impacts and environmental costs of outdoor recreation, including OHV use