IX. BEDTIME ROUTINES IN EARLY CHILDHOOD: PREVALENCE,CONSISTENCY, AND ASSOCIATIONS WITH NIGHTTIME SLEEP          下载免费PDF全文

Angela D. Staples  John E. Bates  Isaac T. Petersen 《Monographs of the Society for Research in Child Development》2015,80(1):141-159

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Determinants of bone mineral density in patients on haemodialysis or peritoneal dialysis – a cross-sectional,longitudinal study     

Mads Nybo  Bente Jespersen  Michael Aarup  Charlotte Ejersted  Anne Pernille Hermann  Kim Brixen 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2013,23(3):342-350

Introduction:

The aim of the study was to identify biomarkers of alteration in bone mineral density (BMD) in patients on haemodialysis (HD) and peritoneal dialysis (PD).

Materials and methods:

In a cross-sectional, longitudinal study dual-energy X-ray absorptiometry scans were performed in 146 HD-patients and 28 PD-patients. Follow-up after 14 months (mean) was conducted in 73 patients. As potential biomarkers we investigated parathyroid hormone (PTH), 25-hydroxy vitamin-D, ionised calcium, albumin, phosphate, and total alkaline phosphatases (t-ALP).

Results:

Both groups of dialysis patients had lower BMD in the femoral neck (BMD_neck) (P < 0.001) and forearm (BMD_forearm) (P < 0.001) compared to healthy controls, but comparable BMD in the lumbar spine (BMD_spine). BMD did not differ between dialysis types, but patients ever-treated with glucocorticoids had significantly lower BMD, while patients with polycystic kidney disease had higher BMD. BMD correlated with body weight, actual age, age at initiation of dialysis, duration of dialysis and levels of PTH and t-ALP. However, t-ALP only remained associated with low BMD_spine after adjusting for other factors (P = 0.001). In the follow-up study all patients had decreased BMD in all three locations, but only for the lumbar spine there was a significant association between BMD and the bone markers t-ALP (P = 0.009) and PTH (P = 0.013).

Conclusions:

Both HD and PD patients have low BMD, and increased concentrations of t-ALP is associated BMD_spine after adjustment, while PTH and t-ALP is associated with decrease in BMD_spine over time. This substantiates the use of these biomarkers in both types of dialysis patients.  相似文献   

Web &; wild     

Ruth Petersen 《TechTrends》2003,47(3):58-58

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Trajectories of self-perceived math ability,utility value and interest across middle school as predictors of high school math performance     

Jennifer Lee Petersen  Janet Shibley Hyde 《教育心理学》2017,37(4):438-456

Although many studies have documented developmental change in mathematics motivation, little is known about how these trends predict math performance. A sample of 288 participants from the United States reported their perceived math ability, math utility value and math interest in 5th, 7th and 9th grades. Latent growth curve models estimated developmental trajectories in each of these constructs. Mathematics interest and utility value decreased across time, but there was no significant change in self-perceived math ability. Slopes and intercepts of all mathematics motivation variables correlated with one another. Even when controlling for prior mathematics performance, students who self-reported high math ability in 5th grade had higher standardised test scores than their peers in high school five years later. Neither math utility value nor math interest intercepts or slopes predicted later performance. Understanding the predictors of math performance is important for supporting students’ success in science, technology, engineering and mathematics careers.  相似文献   

Investigation of guided school tours,student learning,and science reform recommendations at a museum of natural history     

Anne M. Cox‐Petersen  David D. Marsh  James Kisiel  Leah M. Melber 《科学教学研究杂志》2003,40(2):200-218

A study of docent‐led guided school tours at a museum of natural history was investigated. Researchers engaged in naturalistic inquiry to describe how natural history content was conveyed to students and what students gained from this model of touring. They also investigated how the content and pedagogy within the guided tour complemented recommendations from formal science standards documents and informal learning literature. About 30 visiting school groups in Grades 2–8 were observed. Teachers (n = 30) and select students (n = 85) were interviewed. Researchers found that tours were organized in a didactic way that conflicted with science education reform documents and research related to learning within informal contexts. Students' responses to interview questions indicated high satisfaction with the tours but low levels of science learning. © 2003 Wiley Periodicals, Inc. J Res Sci Teach 40: 200–218, 2003  相似文献   

Active Learning in Engineering Education: a (re)introduction     

Rui M. Lima  Pernille Hammar Andersson  Elisabeth Saalman 《European Journal of Engineering Education》2017,42(1):1-4

ABSTRACT

The informal network ‘Active Learning in Engineering Education’ (ALE) has been promoting Active Learning since 2001. ALE creates opportunity for practitioners and researchers of engineering education to collaboratively learn how to foster learning of engineering students. The activities in ALE are centred on the vision that learners construct their knowledge based on meaningful activities and knowledge. In 2014, the steering committee of the ALE network reinforced the need to discuss the meaning of Active Learning and that was the base for this proposal for a special issue. More than 40 submissions were reviewed by the European Journal of Engineering Education community and this theme issue ended up with eight contributions, which are different both in their research and Active Learning approaches. These different Active Learning approaches are aligned with the different approaches that can be increasingly found in indexed journals.  相似文献   

Existential career guidance for groups of young refugees and migrants: a Danish initiative     

Petersen  Inger-Lise Vanja Lund  Mariager-Anderson  Kristina  Patillon  Thi-Van  Bernaud  Jean-Luc 《International Journal for Educational and Vocational Guidance》2022,22(2):511-529

International Journal for Educational and Vocational Guidance - For many young migrants and refugees, adapting to a new life in Denmark is a challenging process. They often find themselves...  相似文献   

The use of touch devices for enhancing academic achievement: A meta‐analysis     

Shawna M. Petersen‐Brown  Erin E. C. Henze  David A. Klingbeil  Jennifer L. Reynolds  Rachel C. Weber  Robin S. Codding 《Psychology in the schools》2019,56(7):1187-1206

Touch devices such as tablets and smartphones are widely adopted in educational settings and have many desirable features. However, research supporting the use of touch devices to improve academic achievement is emergent and has not been evaluated through a meta‐analysis. We conducted a meta‐analysis of 65 group and single case design research studies, published 2010–2018, to evaluate the effects of touch device implementation on academic achievement. The overall mean effect sizes were moderate for group design and single case design studies. Participant, intervention, and study attributes were also evaluated to describe the research and how these attributes may moderate the results. Overall, results suggest that touch devices may be an effective tool for enhancing academic achievement. The need to conduct additional, rigorous research on the use of touch devices as well as implications for researchers and practitioners are discussed.  相似文献   

Multidimensional Scaling Analysis of Growth and Change     

Cody S. Ding  Mark L. Davison  Anne C. Petersen 《Journal of Educational Measurement》2005,42(2):171-191

Latent growth curve modeling provides a powerful and flexible tool for researchers to study individual differences in change as well as the correlates and predictors of change. Recent developments in estimation and hypothesis testing procedures are largely based on confirmatory structural equation approaches. In this article, an alternative exploratory approach is proposed for the analysis of growth and change using multidimensional scaling (MDS). When applied to growth data, it is a growth pattern recognition technique that partitions individual differences into initial level and growth pattern components. When applied to other longitudinal data, it can be used to study change patterns. A math achievement data set is used to illustrate the growth modeling method and a mood variable is used to illustrate change modeling. The strengths and limitations of the MDS growth profile analysis are discussed.  相似文献   

It matters whether reading comprehension is conceptualised as rate or accuracy     

Louise Flensted Rnberg  Dorthe Klint Petersen 《Journal of Research in Reading》2016,39(2):209-228

This study shows that it makes a difference whether accuracy measures or rate measures are used when assessing reading comprehension. When the outcome is reading comprehension accuracy (i.e., the number of correct responses), word reading skills (measured as access to orthographic representations) account for a modest amount of the variance in the reading comprehension of 10‐year old children. However, this changes when reading comprehension is conceptualised as rate (i.e., number of correct responses per minute); when this is done, the correlation with word reading increases. The result was validated in two different reading comprehension tests. Moreover, this study indicates that it is not merely efficient word reading that influences the process of comprehending at a fast rate. When word reading and receptive vocabulary are controlled, a written measure of the ability to access and connect similar word meanings (synonym judgement) explains additional variance in reading comprehension rate.  相似文献