Prenatal Caloric Intake and the Development of Academic Achievement Among U.S. Children From Ages 5 to 14          下载免费PDF全文

Eric J. Connolly  Kevin M. Beaver 《Child development》2015,86(6):1738-1758

Few studies have examined the relation between maternal caloric intake during pregnancy and growth in child academic achievement while controlling for important confounding influences. Using data from the National Longitudinal Survey of Youth, the current study examined the effects of reduced prenatal caloric intake on growth in scores on the Peabody Individual Achievement Test from ages 5 to 14. While models controlling for within‐family covariates showed that prenatal caloric intake was associated with lower reading and mathematical achievement at age 5, models controlling for between‐family covariates (such as maternal IQ) and unobserved familial confounders revealed only a statistically significant association between siblings differentially exposed to prenatal caloric intake and mathematical achievement at age 5.  相似文献   

Statistical Diversions          下载免费PDF全文

Peter Petocz  Eric Sowey 《Teaching Statistics》2015,37(2):66-69

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Explicating Physical Activity Preferences of Community-Dwelling Filipino Elderly in Urban and Rural Settings: A Conjoint Analysis     

Allan B. de Guzman  Eric Harold M. Jatulan  Joyce Ann Camille A. Jimenez 《Educational gerontology》2015,41(4):251-266

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Ten Salient Practices of Undergraduate Research Mentors: A Review of the Literature     

Jenny Olin Shanahan  Elizabeth Ackley-Holbrook  Eric Hall  Kearsley Stewart  Helen Walkington 《Mentoring & Tutoring: Partnership in Learning》2015,23(5):359-376

This paper identifies salient practices of faculty mentors of undergraduate research (UR) as indicated in the extensive literature of the past two decades on UR. The well-established benefits for students involved in UR are dependent, first and foremost, on high-quality mentoring. Mentorship is a defining feature of UR. As more and different types of colleges and universities strive to meet student demand for authentic scholarly experiences, it is imperative to identify what effective UR mentors do in order to ensure student engagement, quality enhancement, retention, and degree-completion. We offer an original analysis of the literature on UR mentoring in which we identify 10 significant “lessons learned,” or evidence-based practices of effective UR mentors that apply broadly across disciplines, students, institutions, and mentoring approaches.  相似文献   

Adult outcomes of sustained high-quality early child care and education: Do they vary by family income?     

Andres S. Bustamante  Eric Dearing  Henrik Daae Zachrisson  Deborah Lowe Vandell 《Child development》2022,93(2):502-523

Experimental research demonstrates sustained high-quality early care and education (ECE) can mitigate the consequences of poverty into adulthood. However, the long-term effects of community-based ECE are less known. Using the 1991 NICHD Study of Early Child Care and Youth Development (n = 994; 49.7% female; 73.6% White, 10.6% African American, 5.6% Latino, 10.2% Other), results show that ECE was associated with reduced disparities between low- and higher-income children's educational attainment and wages at age 26. Disparities in college graduation were reduced the more months that low-income children spent in ECE (d = .19). For wages, disparities were reduced when children from low-income families attended sustained high-quality ECE (d = .19). Findings suggest that community-based ECE is linked to meaningful educational and life outcomes, and sustained high-quality ECE is particularly important for children from lower-income backgrounds.  相似文献   

Building Women’s Innovation Capacities Through Undergraduate Experiences     

Selznick  Benjamin S.  Mayhew  Matthew J.  Zhang  Lini  McChesney  Eric T. 《Research in higher education》2022,63(4):567-588

Research in Higher Education - This study examines how collegiate climates and practices can promote innovation capacities among an international longitudinal sample of undergraduate women. Using a...  相似文献   

Program Review: Perspectives on an Improvement-Oriented Process     

Caleb J. Keith  Kristine Brunovska Karnick  Chandra L. Kohler  Eric J. Teske  A. Sonia Ninon 《Assessment Update》2023,35(5):6-14

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Do more hours in center-based care cause more externalizing problems? A cross-national replication study     

Catalina Rey-Guerra  Henrik D. Zachrisson  Eric Dearing  Daniel Berry  Susanne Kuger  Margaret R. Burchinal  Ane Nærde  Thomas van Huizen  Sylvana M. Côté 《Child development》2023,94(2):458-477

Whether high quantities of center-based care cause behavior problems is a controversial question. Studies using covariate adjustment for selection factors have detected relations between center care and behavior problems, but studies with stronger internal validity less often find such evidence. We examined whether within-child changes in hours in center-based care predicted changes in externalizing problems in toddlers and preschoolers (N = 10,105; 49% female; data collection 1993–2012) in seven studies, including from Germany, Netherlands, Norway, two from Canada and two from the U.S. Race/ethnicity data were only collected in the United States (57% and 80% White; 42% and 13% African-American; 1.2% and 5% Latinx). Meta-analyses showed no association (r = .00, p = .88) between hours in center-based care and externalizing problems.  相似文献   

Technological change in U.S. jet fighter aircraft     

Anelí Bongers  José L. Torres 《Research Policy》2014

This paper quantitatively measures technological change in U.S. jet fighter aircraft from 1944 to the present day using the hedonic pricing approach. The technical and performance characteristics of jet fighters have changed dramatically between the time they were first developed at the beginning of the 1940s and the present. Parallel to this technological change there has been a sharp escalation in costs regarding the new generations of jet fighter aircraft. We estimate a measure of price for the performance and technical characteristics of these aircraft. Embodied technological change in jet fighter airframes is measured using quality-adjusted prices. Although the flyaway cost of jet fighter aircraft has soared, on average, by about 12.63% per year, the quality-adjusted aircraft cost has only risen by about 2.6% per year, a figure lower than the average observed general inflation rate for the period (around 4%). This represents an impressive average technological progress ratio of around 10% per year. A revealed preferences argument shows that the characteristic most valued by the government is stealth capability, followed by advanced avionics.  相似文献   

User community vs. producer innovation development efficiency: A first empirical study     

Christoph Hienerth  Eric von Hippel  Morten Berg Jensen 《Research Policy》2014

In this paper we report upon a first empirical exploration of the relative efficiency of innovation development by product users vs. product producers. In a study of over 50 years of product innovation in the whitewater kayaking field, we find users in aggregate were approximately 3× more efficient at developing important kayaking product innovations than were producers in aggregate. We speculate that this result is driven by what we term “efficiencies of scope” in problem-solving. These can favor an aggregation of many user innovators, each spending a little, over fewer producer innovators benefitting from higher economies of scale in product development. We also note that the present study explores only one initial point on what is likely to be a complex efficiency landscape.  相似文献