Understanding Linear Function: a Comparison of Selected Textbooks from England and Shanghai     

Yuqian Wang  Patrick Barmby  David Bolden 《International Journal of Science and Mathematics Education》2017,15(1):131-153

This study describes a comparison of how worked examples in selected textbooks from England and Shanghai presented possible learning trajectories towards understanding linear function. Six selected English textbooks and one Shanghai compulsory textbook were analysed with regards to the understanding required for pure mathematics knowledge in linear function. Understanding was defined as being at five levels: Dependent Relationship, Connecting Representations, Local Properties Noticing, Object Analysis and Inventising. These levels were developed by examining the most prominent theories from the existing literature on understanding function. Findings suggested that the English textbooks constrained the structural aspect of understanding linear function due to a point-to-point view of function, while the Shanghai textbook which focussed on a variable view of function overemphasised the algebraic approach. The discussion explored the drawbacks to each approach and what teachers or textbook writers could do to balance these two approaches in order to facilitate students’ understanding towards a structural view of linear function.  相似文献   

Effect of foster care on young children's language learning     

Windsor J  Benigno JP  Wing CA  Carroll PJ  Koga SF  Nelson CA  Fox NA  Zeanah CH 《Child development》2011,82(4):1040-1046

This report examines 174 young children's language outcomes in the Bucharest Early Intervention Project, the first randomized trial of foster placement after institutional care. Age of foster placement was highly correlated with language outcomes. Placement by 15 months led to similar expressive and receptive language test scores as typical age peers at 30 and 42 months. Placement from 15 to 24 months also led to dramatic language improvement. In contrast, children placed after 24 months had the same severe language delays as children in institutional care. Language samples at 42 months confirmed that placement after 24 months led to lower expressive skill.  相似文献   

Changes in the prevalence of child sexual abuse, its risk factors, and their associations as a function of age cohort in a Finnish population sample     

Laaksonen T  Sariola H  Johansson A  Jern P  Varjonen M  von der Pahlen B  Sandnabba NK  Santtila P 《Child abuse & neglect》2011,35(7):480-490

Objective

We examined (1) the prevalence of childhood sexual abuse (CSA) experiences as a function of cohort and gender, (2) the prevalence of factors associated with CSA as a function of cohort and whether the association of these factors with CSA remained the same irrespective of cohort, and (3) whether any cohort differences could be explainable by cohort differences in reporting bias.

Method

We used the responses of 4,561 men (M = 29, SD = 7 years) and 8,361 female (M = 29, SD = 7 years) Finnish participants who responded to the Childhood Trauma Questionnaire-Short Form as well as questions regarding family structure.

Results

The prevalence of CSA experiences varied between 0.7-4.6% for men and 1.8-7.5% for women depending on the item. Younger cohorts reported less CSA as well as less of the risk factors (physical neglect and abuse, emotional neglect and abuse, parental substances abuse, not growing up with both biological parents) that were positively associated with the likelihood of CSA. The effects of these risk factors did not vary as a function of the cohort. Also, the declining trend was not explainable by social desirability being higher in the younger cohorts.

Conclusions

The results suggest that there is a real decline in the prevalence of CSA and it is associated with a simultaneous decline in factors associated with CSA.  相似文献   

Whole-body predictors of wrist shot accuracy in ice hockey: a kinematic analysis     

Michaud-Paquette Y  Magee P  Pearsall D  Turcotte R 《Sports biomechanics / International Society of Biomechanics in Sports》2011,10(1):12-21

The purpose of this study was to identify joint angular kinematics that corresponds to shooting accuracy in the stationary ice hockey wrist shot. Twenty-four subjects participated in this study, each performing 10 successful shots on four shooting targets. An eight-camera infra-red motion capture system (240 Hz), along with passive reflective markers, was used to record motion of the joints, hockey stick, and puck throughout the performance of the wrist shot. A multiple regression analysis was carried out to examine whole-body kinematic variables with accuracy scores as the dependent variable. Significant accuracy predictors were identified in the lower limbs, torso and upper limbs. Interpretation of the kinematics suggests that characteristics such as a better stability of the base of support, momentum cancellation, proper trunk orientation and a more dynamic control of the lead arm throughout the wrist shot movement are presented as predictors for the accuracy outcome. These findings are substantial as they not only provide a framework for further analysis of motor control strategies using tools for accurate projection of objects, but more tangibly they may provide a comprehensive evidence-based guide to coaches and athletes for planned training to improve performance.  相似文献   

The European university landscape: A micro characterization based on evidence from the Aquameth project   总被引：2，自引：0，他引：2  

Cinzia Daraio  Andrea BonaccorsiAldo Geuna  Benedetto LeporiLaurent Bach  Peter BogetoftMargarida F. Cardoso  Elena Castro-MartinezGustavo Crespi  Ignacio Fernandez de LucioHarold Fried  Adela Garcia-AracilAnnamaria Inzelt  Ben JongbloedGerhard Kempkes  Patrick LlerenaMireille Matt  Maria OlivaresCarsten Pohl  Tarmo RatyMaria J. Rosa  Cláudia S. SarricoLéopold Simar  Stig SlipersaeterPedro N. Teixeira  Philippe Vanden Eeckaut 《Research Policy》2011,40(1):148-164

This paper provides a new and systematic characterization of 488 universities, from 11 European countries: Finland, France, Germany, Hungary, Italy, Netherlands, Norway, Portugal, Spain, Switzerland and UK. Using micro indicators built on the integrated Aquameth database, we characterize the European university landscape according to the following dimensions: history/foundation of university, dynamics of growth, specialization pattern, subject mix, funding composition, offer profile and productivity.  相似文献   

Analysis of gene expression at the single-cell level using microdroplet-based microfluidic technology     

Mary P  Dauphinot L  Bois N  Potier MC  Studer V  Tabeling P 《Biomicrofluidics》2011,5(2):24109

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Criminal Justice Education: Are We Missing One-third of the Crime Triangle?     

Lisa Growette Bostaph  Patrick Brady  Andrew Giacomazzi 《Journal of Criminal Justice Education》2014,25(4):468-485

Theoretical explanations, systemic response, and policy work on offenders and specific crime types are the backbone of criminal justice curricula in the United States. However, a similar breadth and depth of education on crime victims appear to be lacking in traditional criminal justice curricula, despite voluminous research on victims of crime. In this exploratory study, the authors conducted a content analysis of 679 programs from the Academy of Criminal Justice (ACJS) website directory. Departmental and course-level variables were included in the analysis. Results indicate that while more than half of the programs have faculty with expressed interests in victimization, only 11% of programs studied required coursework on crime victims and/or victimization. Implications of the results are discussed.  相似文献   

A Behind‐the‐Scenes Guide to School‐Based Research     

Benjamin D. Plummer  Brian M. Galla  Amy S. Finn  Sarah D. Patrick  David Meketon  Julia Leonard  Calvin Goetz  Elizabeth Fernandez‐Vina  Sara Bartolino  Rachel E. White  Angela L. Duckworth 《Mind, Brain, and Education》2014,8(1):15-20

Schools are an important context for both basic and applied scientific research. Unlike the laboratory, however, the physical and social conditions of schools are not under the exclusive control of scientists. In this article, we liken collecting data in schools to putting on a theatrical production. We begin by describing the large cast of characters whose collaborative efforts make school‐based research possible. Next, we address the critics, including the university Institutional Review Board (IRB) and school administrators, whose feedback often improves the final study design. We then turn our attention to set building, stage directions, and rehearsals—key steps in the iterative process of refining study procedures. We end with a discussion of the day of data collection itself and activities that take place after the curtain drops. Throughout, we make recommendations based on our recent experience collecting data at several high schools.  相似文献   

A retrospective look at replacing face‐to‐face embryology instruction with online lectures in a human anatomy course          下载免费PDF全文

Elmus G. Beale  Patrick M. Tarwater  Vaughan H. Lee 《Anatomical sciences education》2014,7(3):234-241

Embryology is integrated into the Clinically Oriented Anatomy course at the Texas Tech University Health Sciences Center School of Medicine. Before 2008, the same instructor presented embryology in 13 face‐to‐face lectures distributed by organ systems throughout the course. For the 2008 and 2009 offerings of the course, a hybrid embryology instruction model with four face‐to‐face classes that supplemented online recorded lectures was used. One instructor delivered the lectures face‐to‐face in 2007 and by online videos in 2008–2009, while a second instructor provided the supplemental face‐to‐face classes in 2008–2009. The same embryology learning objectives and selected examination questions were used for each of the three years. This allowed direct comparison of learning outcomes, as measured by examination performance, for students receiving only face‐to‐face embryology instruction versus the hybrid approach. Comparison of the face‐to‐face lectures to the hybrid approach showed no difference in overall class performance on embryology questions that were used all three years. Moreover, there was no differential effect of the delivery method on the examination scores for bottom quartile students. Students completed an end‐of‐course survey to assess their opinions. They rated the two forms of delivery similarly on a six‐point Likert scale and reported that face‐to‐face lectures have the advantage of allowing them to interact with the instructor, whereas online lectures could be paused, replayed, and viewed at any time. These experiences suggest the need for well‐designed prospective studies to determine whether online lectures can be used to enhance the efficacy of embryology instruction. Anat Sci Educ 7: 234–241. © 2013 American Association of Anatomists.  相似文献   

Fictitious Academic Expertise and Processing Resources     

Patrick Chambres  Rmy Versace  Catherine Auxiette 《Contemporary educational psychology》2001,26(4):507

A previous study showed that pairs of students interacting in a second language produced more words when they were assigned a fictitious expert position in a specific competence dimension than when they were assigned a nonexpert position. It has also been shown that the usual level of expertise has an impact on the assigned fictitious expertise effect. The present study was designed to determine whether the processing capacity allotted to the current task could partly determine performance. A given position of expertise may demand a large or small attentional capacity. Two experiments were conducted using a dual-task paradigm. As expected, the different expertise positions led to different reaction times on the secondary task. The second experiment showed that the impact of assigning a position of expertise to students depends on their usual academic standing. This study supports the idea that in interactive situations, performance variations as a function of the expertise position can be partially explained by differences in the processing resources allocated to the task. Implications for teaching are discussed.  相似文献