296 research outputs found
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A Practitioner’s Guide to Value-Added Assessment (Educational Policy Studies Laboratory Research Monograph)
This guide is intended for the practitioner needing to get up to speed quickly regarding Value-Added Assessment (VAA). Based on a comprehensive review of current research on VAA, the guide outlines several issues that must be kept in mind when implementing a VAA-based accountability system. In addition to describing the similarities and differences among six major approaches to VAA, the guide also details several VAA-based accountability programs currently in use. Finally, the guide offers practitioners and policymakers guidance on assessing the potential of VAA for their own purposes
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NEPC Review: Getting Ahead by Staying Behind: An Evaluation of Florida's Program to End Social Promotion
This Education Next article summarizes the Manhattan Institute's original study, An Evaluation of Florida's Program to End Social Promotion, which was released in December 2004. The study examines Florida's program to end social promotion. The authors analyze the test scores of two third-grade cohorts over the period of one year. The authors conclude that there are substantial positive effects associated with retention in this program. This Education Next article summarizes the Manhattan Institute's original study, An Evaluation of Florida's Program to End Social Promotion, which was released in December 2004. The study examines Florida's program to end social promotion. The authors analyze the test scores of two third-grade cohorts over the period of one year. The authors conclude that there are substantial positive effects associated with retention in this program.</p
Far Ultraviolet Spectroscopy of Seven Nova-Like Variables
We present the results of a multi-component synthetic spectral analysis of
the archival far ultraviolet spectra of several key nova-like variables
including members of the SW Sex, RW Tri, UX UMa and VY Scl subclasses: KR Aur,
RW Tri, V825 Her, V795 Her, BP Lyn, V425 Cas and HL Aqr. Accretion rates as
well as the possible flux contribution of the accreting white dwarf are
included in our analysis. Except for RW Tri which has a reliable trigonometric
parallax, we computed the distances to the nova-like systems using the method
of Knigge (2006). Our analysis of seven archival IUE spectra of RW Tri at its
parallax distance of 341 pc consistently indicates a low mass (0.4Msun) white
dwarf and an average accretion rate, 6.3 E-9Msun/yr. For KR Aur, we estimate
that the white dwarf has Teff=29,000K, log g = 8.4 and contributes 18% of the
FUV flux while an accretion disk with accretion rate of 3 E-10Msun/yr at an
inclination of 41 degrees, contributes the remainder. We find that an accretion
disk dominates the far UV spectrum of V425 Cas but a white dwarf contributes
non-negligibly with approximately 18% of the FUV flux. For the two high state
nova-likes, HL Aqr and V825 Her, their accretion disks totally dominate with 1
E-9Msun/yr and 3 E-9Msun/yr, respectively. For BP Lyn we find an accretion rate
of 1 E-8Msun/yr while for V795 Her, we find an accretion rate of 1 E-10Msun/yr.
We discuss the implications of our results for the evolutionary status of
nova-like variables.Comment: ApJ, accepte
Harnessing Museum Resources for the Census of Marine Life: The FISHNET Project
No abstract is available for this item
Research Article CRITICAL EVIDENCE: A Test of the Critical-Period Hypothesis for Second-Language Acquisition
Abstract-me crirical-period hypothesisfor second-language acquisition was rested on doto from the 1990 U.S. Census using responses from 2.3 million immigrants with Spanish or Chinese language backgrounds. The analyses rested a key prediction of the hypothesis, namely, that the line regressing second-language attainment on age of immigration would be markedly different on either side ofrhe criticalage point. Predictions tested were that there would be a difference in slope, a difference in the mean while controlling for slope, or both. The results showed large linear effectsfor level ofeducation and for age of immigration, but a negligible amount of additional variance was accounted for when the parameters for diffeerence in slope and difference in means were estimated. Thus, the pattern of decline in second-language acquisitionfailed to produce the discontinuity that is an essential hallmark o f a critical period. The idea that there is a biologically based critical period for secondlanguage acquisition that prevents older learners from achieving nativeLike competence has appeal lo both theorists and social policymakers (Bailey, Brner, Symons, & Lichtman, 2001). The critical-period hypothesis was originally proposed in the neurolinguistic litemture by Penfield and Robem (1959) and vigorously followed up by Lenneberg (1967). who speculated that maturational aspects of the brain that limited recovery from brain traumas and disorders would extend to second-language acquisition. Subsequent research using behavioral evidence appeared to confirm this hypothesis (Johnson, 1992; Johnson & NewpoIf 1989; The claim that there is an age-related decline in the success with which individuals master a second language is not controversial. The diminished average achievement of older learners is supported by personal anecdote and documented by empirical evidence (Flege, YeniKomshian, & Liu, 1999; Stevens, 1999). What is controversial, though, is whether this pattern meets the conditions for concluding that a critical period constrains learning in a way predicted by the theory. A critical period minimally entails two characteristics: (a) a high level of preparedness for learning within a specified developmental period to ensure the domain is mastered by the species and @) a lack of preparedness outside this period (Bornstein, 1989; Colombo, 1982). The consequence of these conditions is that the relation between learning and age is different inside and outside the critical period. hponents of a critical-period explanation have attempted to place the description of second-language learning within these pammeters. Johnso
Complementary and Alternative Medicine Use in Musculoskeletal Disorders: Does Medical Skepticism Matter?
Medical skepticism is the reservation about the ability of conventional medical care to significantly improve health. Individuals with musculoskeletal disorders seeing specialists usually experience higher levels of disability; therefore it is expected they might be more skeptical of current treatment and thus more likely to try Complementary and Alternative Medicine (CAM). The goal of this study was to define these relationships. These data were drawn from a cross-sectional survey from two cohorts: those seeing specialists (n=1,344) and non-specialists (n=724). Site-level fixed effects logistic regression models were used to test associations between medical skepticism and 10 CAM use categories. Some form of CAM was used by 88% of the sample. Increased skepticism was associated with one CAM category for the non-specialist group and six categories for the specialist group. Increased medical skepticism is associated with CAM use, but medical skepticism is more often associated with CAM use for those seeing specialists
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The Impact of the Adequate Yearly Progress Requirement of the Federal "No Child Left Behind" Act on Schools in the Great Lakes
This study finds that nearly every school in the Great Lakes states is threatened to fail the Adequate Yearly Progress (AYP) requirements mandated by the federal “No Child Left Behind” (NCLB) Act. In general, approximately 85 percent of schools in the Great Lakes states are projected to fail AYP in 2014 under the most optimistic scenarios. Under more realistic circumstances, the overall failure rate is projected to be at or above 95 percent. The authors question the sustainability of the AYP requirements. Furthermore, they caution that schools are not capable of closing the achievement gap without resolving the social problems that underlie this gap. They point out that adequate funding for remediation and social infrastructure is essential to meeting the stated goals of NCLB
A Response to Mooi, Williams and Gill
This is the publisher's version, which the author has permission to share. The original version may be found at the following link: http://www.mapress.com/zootaxa/list/2011/2946.htm
Will the Real Phylogeneticists Please Stand Up?
This is the publisher's version, also availalble electronically from http://www.mapress.com/zootaxa/list/2011/2946.html.In a recently published commentary, Mooi & Gill asserted that there is a crisis brewing in systematic ichthyology
caused by a failure of investigators to apply the basic tenets of outgroup comparison to recover clades based solely on shared apomorphic characters. The result, they claim, is that many recent analyses disregard real synapomorphies and discover clades by phenetic rather than phylogenetic principles. We take the opportunity to refute this claim and assert that matrix-based analyses, whether parametric or nonparametric, satisfy the basic tenets of Hennig’s methods, resulting in monophyletic groups confirmed by synapomorphies
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