Physical movement demands of elite-level netball match-play as measured by an indoor positioning system

ABSTRACT

Physical movement demands in elite netball match-play have been limited to notational analysis or accelerometer-derived measures, due in part to the indoor environment in which they are played. Commercially available local positioning systems (LPS) using ultra-wideband communication have been designed to bring similar capabilities as global positioning systems (GPS) to indoor environments. This study aims to quantify both spatiotemporal and traditional accelerometer-derived measures, to assess the movement demands of all playing positions, during Australian national netball league matches. Total distance, metreage per minute, acceleration density, acceleration density index, acceleration load, jumps, velocity bands, acceleration bands and PlayerLoad variables have been presented for each position. Mean total distance-covered in match-play differed substantially between positions. Centre position accumulated the highest mean distance (5462.1 ± 169.4 m), whilst the Goal Shooter consistently covered the lowest mean distance (2134 ± 102.6 m). Change of direction relative to movement area was highest for the two most restricted positions based on average acceleration per 10 m covered during match-play (Goal Shooter; 7.21 ± 0.88 m · s ^{? 2} and Goal Keeper; 6.75 ± 0.37 m · s ^{? 2}, remaining positions; 5.71 ± 0.14 m · s ^{? 2}). The positional profiles outlined in this study can assist skill and conditioning coaches to prescribe training sessions that will optimise the athlete’s physical preparation for the demands of competition.     

Perceived Norms and Marijuana Use at Historically Black Colleges and Universities

Relatively little is known about the extent of marijuana use and related risk‐taking behavior by college students on historically Black colleges and universities (HBCUs). Undergraduate students (N = 212) from an HBCU in the southern region of the United States completed anonymous questionnaires that assessed their marijuana‐related behaviors and perceptions. Logistic regression analysis revealed risk factor profiles that provide college counselors with greater insight into prevention and treatment on HBCU campuses.     

Response to Pepperberg; Herman and Uyeyama; and Shanker, Savage-Rumbaugh, and Taylor

Whether the animals studied by Pepperberg, Herman, and Savage-Rumbaugh can learn prepositions remains an open and important question, though the dolphins’ use of demonstratives and conjuctions suggests an impressive competence for at least some closed-class items. It is unlikely that human-like brain structure can explain the capacities of these animals. Their capacities may instead be built upon the cognitive mechanisms favored by social complexity     

The effects of developmental placement and early retention on children's later scores on standardized tests

The relationship between early school retention as a result of preschool and kindergarten developmental testing and children's later academic achievement was examined. Two hundred twenty-three children were coded as Traditional, Overplaced, or “Buy a Year,” depending on their scores on the Gesell Screening Test and their subsequent school placement. Their performances on the full Gesell Developmental Test, 3rd grade New York State PEP Tests in reading and math, and the Stanford Achievement Test (SAT) were compared. Those children who scored as immature on the Gesell Screening Test and who were retained a year according to the Gesell Developmental Placement Program had the lowest scores on all measures, even though they were almost a year older than the other two groups of children at the time of the PEP and SAT testing.     

Variations in methods of calculating reliability of duration data

The traditional percentage and correlational methods of estimating reliability of duration recording were compared to the reliability obtained with an event-by-event examination of observers' records in which the actual percentage of time that the observers were in agreement was calculated. While observing standardized videotapes, eight volunteer undergraduate students recorded “studying” using a specific definition and “not eating” using a nonspecific definition. The order of persentation and level of definition specificity were reversed for eight additional volunteer observers. Recordings were done on an event recorder. It was found that the traditional percentage reliability scores were significantly higher than actual (event-by-event) observer agreement for both behaviors, at both levels of definition specificity. Correlational reliability coefficients were significantly greater than event-by-event scores for specific definitions only. Implications of the findings include the possibility that duration recording, which does not involve a permanent product (e.g., when using a stopwatch), may be periodically checked for reliability with an event recorder, or that interval recording may be used.     

The Snowbird Charrette: Integrative Interdisciplinary Collaboration in Environmental Research Design

The integration of ideas, methods, and data from diverse disciplines has been a transformative force in science and higher education, attracting policy interventions, program innovations, financial resources, and talented people. Much energy has been invested in producing a new generation of scientists trained to work fluidly across disciplines, sectors, and research problems, yet the success of such investments has been difficult to measure. Using the Integrative Graduate Education and Research Training (IGERT) program of the U.S. National Science Foundation as a strategic research site, we conducted an experiment to determine whether and how the process and products of research of IGERT-trained scientists differ from those of scientists trained in disciplinary graduate programs. Among scientists in the early years of graduate study we found substantial and consistent differences suggesting that interdisciplinary training improved the quality and process of research, but this pattern was equally strongly reversed among students in the latter years of graduate study. Using systematic observation and other data we suggest why this might be so, then discuss the implications of these results for the design and conduct of graduate education and research.     

The Changing Media Representation of T. E. Lawrence and Celebrity Culture in Britain, 1919–1935

Abstract

This article presents a new analysis of representations of T. E. Lawrence to explore how the media created celebrity identities in interwar Britain. Examining his appearance in seventeen national newspapers and in newsreels between 1919 and 1935, it shows how earlier press depictions that borrowed from Lowell Thomas’s portrayal of him as the mythical ‘Lawrence of Arabia’ were disrupted by a nascent media-driven celebrity culture which aimed to uncover intimate details of the lives of the so-called ‘real’ people that were believed to exist behind the outward personae of the famous. By the late 1920s, the press’s attention had switched from Lawrence as an imperial adventurer to focus on the intensely private man who lay behind the public image of the ‘Blonde Bedouin’. This shift in emphasis denoted a significant change in the way celebrities were presented by the news media in interwar Britain. Journalists intensified their exposure of celebrities’ private lives to amplify the empathetic connection between the public and the famous at a time when new modes of self-fashioning were configured through expression in private, domestic life. This shift was also informed by growing anxieties regarding how public figures communicated their social authority to the new audiences of the interwar mass media, newspapers and newsreels exposing famous people’s private lives to generate emotional connections with members of the public which would strengthen concepts of social leadership and trust.     

The daily report card: A simplified and flexible package for classroom behavior management

There is a growing need for rapid low cost, and proven behavior management techniques for classroom teachers. Often, an uncomplicated system of feedback to pupils at frequent intervals, backed by reinforcers delivered at home by cooperating parents, is sufficient to decrease problem behavior and accelerate homework and classwork completion. The present paper presents a system consisting of report cards, instructions for students, parents, and teachers, which is designed to accomplish these objectives. One application of the daily report card in a regular fourth-grade classroom will be presented. In this case, a behavior problem (talkouts), and homework assignment completion were targeted and recorded during a baseline period, and then sequentially remediated using a multiple baseline design. The results indicated rapid improvement with a minimum of teacher time and effort. The use of the card with various problem behaviors in classrooms is discussed as a valuable consultation tool for school intervention.