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111.
Matt Vassar Austin L. Johnson Adriana Sharp Cole Wayant 《Journal of the Medical Library Association》2021,109(1):62
Objective:Reproducibility of systemic reviews (SRs) can be hindered by the presence of citation bias. Citation bias may occur when authors of SRs conduct hand-searches of included study reference lists to identify additional studies. Such a practice may lead to exaggerated SR summary effects. The purpose of this paper is to examine the prevalence of hand-searching reference lists in otolaryngology SRs.Methods:The authors searched for systematic reviews published in eight clinical otolaryngology journals using the Cochrane Library and PubMed, with the date parameter of January 1, 2008, to December 31, 2017. Two independent authors worked separately to extract data from each SR for the following elements: whether reference lists were hand-searched, other kinds of supplemental searching, PRISMA adherence, and funding source. Following extraction, the investigators met to review discrepancies and achieve consensus.Results:A total of 539 systemic reviews, 502 from clinical journals and 37 from the Cochrane library, were identified. Of those SRs, 72.4% (390/539) hand-searched reference lists, including 97.3% (36/37) of Cochrane reviews. For 228 (58.5%) of the SRs that hand-searched reference lists, no other supplemental search (e.g., search of trial registries) was conducted.Conclusions:These findings indicate that hand-searching reference lists is a common practice in otolaryngology SRs. Moreover, a majority of studies at risk of citation bias did not attempt to mitigate the bias by conducting additional supplemental searches. The implication is that summary effects in otolaryngology systematic reviews may be biased toward statistically significant findings. 相似文献
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J. Matt Giglio 《Critical Studies in Media Communication》2013,30(1):26-44
This article argues that commodity flow is a defining characteristic of children's television programming, and that this flow of commodity and corporate-brand images builds into the genre a relatively coherent selling ethos. Three-hour blocks of programming, recorded on two different Saturday mornings for several broadcast and cable networks, were analyzed to highlight commodity flow within and between networks. This flow of commodities on children's television indicates a blurring of the distinction between content and promotional forms and illustrates the high level of commercialism targeted at this audience. 相似文献
114.
Sara Ann Wylie Kirk Jalbert Shannon Dosemagen Matt Ratto 《The Information Society》2014,30(2):116-126
This article explores the changing relationship between the academy and new public formations of scientific research, which we term “civic technoscience.” Civic technoscience leverages tactics seen in critical making communities to question and transform how and who can make credible and actionable knowledge. A comparison of two case studies is used. The first is a grassroots mapping process that allows communities to generate high-quality aerial imagery. The second is an academic-led project using environmental sensors to engage disparate audiences in scientific practice. These two projects were found to differ in their ability to form strategic spaces for community-based science, and suggest pathways to foster more robust relationships across the public–academic divide. By altering power dynamics in material, literary, and social technologies used for scientific research, we argue that civic technoscience enables citizens to question expert knowledge production through critical making tactics, and creates opportunities to generate credible public science. 相似文献
115.
Jeffrey A. Bouffard Matt R. Nobles William Wells 《Journal of Criminal Justice Education》2013,24(3):283-306
The current study examines whether students' course of study is related to their desire to carry a concealed handgun on campus. This analysis is motivated by a growing number of studies that have explored differences between criminal justice (CJ) and other majors in the areas of personality, attitudes, values, and career expectations, and also by discussions of the issue of concealed handguns on campuses following recent shootings on college campuses. Using data from over 3,100 students who completed an online survey instrument, results revealed that CJ majors were in fact more interested in carrying a legally concealed handgun on campus, if it were allowed by university policies. These results held even when controlling for other significant predictors of the desire to carry a concealed handgun. Implications for CJ education and the wider debate about concealed weapons on university campuses are discussed. 相似文献
116.
A number of policymakers have shifted their attention from the participation rates of Hispanics in postsecondary education to the percentage of this population that completes a baccalaureate degree. Several reports stress that while participation rates have increased, there are continued disparities in outcomes between Hispanic and White college students (President's Advisory Commission on Educational Excellence for Hispanic Americans, 2003; Council of Economic Advisers, 2000; Fry, 2002; Vernez & Mizell, 2001). Although many states have experienced increases in Hispanic postsecondary attendance, such is not the case in Texas—a state with one of the largest Hispanic populations in the country. Figures for 2003 show that 3.9% of Hispanics in Texas were enrolled in some type of postsecondary institution compared to 5.2% of African Americans and 5.6% of Caucasians (Haurwitz, 2005). 相似文献
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Sami Mecheri Guillaume Laffaye Céline Triolet David Leroy Matt Dicks Mohamed A. Choukou 《Journal of sports sciences》2013,31(17):1962-1971
ABSTRACTThis study investigated split-step timing when returning serves and whether this timing is related to neuromechanical capabilities in world-class tennis players. In Experiment 1, the split-step timing of four groups of world-class players (male and female ATP/WTA seniors, and ITF juniors) was measured on court when returning serves of the same level players. The four groups initiated the split-step at a similar time, starting around the time ball-racket contact in the serve stroke and landed when early ball-flight information was available. In Experiment 2, the neuromechanical capabilities (leg stiffness and vertical jump performance) of a group of world-class players and three groups of less-skilled tennis players were examined. The results showed an increase in leg stiffness with an increase in the level of expertise. A cross-experiment analysis in world-class male players (ATP/ITF, n = 10) revealed that the timing of initial foot movement was significantly correlated with the leg stiffness (r2 = 0.54), with later lateral step after the serve in the players who had higher stiffness. The findings support the hypothesis that world-class tennis players adapt perceptual-motor control on the basis of their neuromechanical capabilities and maximise the time before initiating their interceptive action to rely on more reliable information. 相似文献
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Frank L. Riggs 《广播与电子媒介杂志》2013,57(4):331-339
Following World War II, an agile broken‐field runner rather than a sedentary historian would be needed to follow the myriad twists, turnings, and changes in radio programming, audiences, and effects in the United States. Now that a certain stability and growth pattern is (hopefully) again dominant, perhaps it is time for those of us who have lived through this period to attempt a rearward look. Frank Riggs, who holds degrees from the University of Arizona and George Washington University, recently completed a tour of duty as Radio‐Television Officer for the Air Force Systems Command, with the responsiility for producing numerous radio documentary and series programs. 相似文献