When is less more? Investigating gap-filling in proofs without words activities

Educational Studies in Mathematics - Visuospatial representations of numbers and their relationships are widely used in mathematics education. These include drawn images, models constructed with...     

Rural Neighborhood Context,Child Care Quality,and Relationship to Early Language Development

Research Findings: Prior research with older urban children indicates that a disadvantaged neighborhood context is associated with poorer early development, including poorer verbal ability, reading recognition, and achievement scores among children. Neighborhood disadvantage in rural communities and at younger age levels may also be related to development; however, this relationship has received little examination. In this study we utilized data from the Family Life Project, a representative sample of babies born to mothers in poor rural counties in North Carolina and Pennsylvania, to address questions related to the relationship between neighborhood context (disadvantage and safety) and children's early language development. We examined the mediation of this relationship by child care quality. We also examined geographic isolation and collective socialization as moderators of the relationship between neighborhood context and child care quality. Results indicated that although neighborhood disadvantage did not predict children's development or child care quality, neighborhood safety predicted children's receptive language, with child care quality a partial mediator of this relationship. Collective socialization but not geographic isolation moderated the relationship between neighborhood safety and child care quality. Practice or Policy: Implications for policy, practice, and future research are discussed, including improving community safety through community policing, neighborhood watch, and social networks and increasing access to quality child care.     

Using body donor demographics to assist the implementation of donation programs in Brazil

The use of human material in anatomy education depends upon the generosity of body donors. However, little is known regarding the demographics of body donors in Brazil, where voluntary body donation is a relatively rare phenomenon. Hence, the aim of the present study was to elucidate the demographic profile of applicants to the Body Donation Program (BDP) at the Federal University of Health Sciences of Porto Alegre in Brazil, as well as to assess whether the observed characteristics of body donors are unique to that sample, or if they merely reflect the characteristics of the regional population. Information derived from the specific forms filled out by donors between January 2008 and June 2016 at the time of registration were collected. Data from 416 forms were analyzed. Based on this study, the typical applicant in Brazil is typically a white female (67.4%), over 60 years of age (60.3%), unmarried or single (70.6%), affiliated with a religious group (89.1%), of middle class background (40.4%), who has completed high school and/or holds a university degree (93.8%). The motivation of donors was, in most cases, an altruistic gesture, represented by the desire to help society and science. Elucidating these demographic characteristics of potential donors may help identify the target public to which information regarding body donation campaigns could be directed. Anat Sci Educ 10: 475–486. © 2017 American Association of Anatomists.     

Mechanical and EMG responses of the vastus lateralis and changes in biochemical variables to isokinetic exercise in endurance and power athletes

Twelve endurance athletes and six power athletes performed fatiguing isokinetic knee flexions/extensions. Isokinetic torque was recorded during the exercise. Isometric torque, cortisol and lactate responses, electromyographic (EMG) mean power frequency, average rectified value, and conduction velocity were analysed before and after the isokinetic exercise to determine correlations between electrophysiological variables and mechanical performances and/or blood concentrations of biomarkers in the two groups of athletes. The EMG variables were estimated from signals recorded from the vastus lateralis in both voluntary and electrically elicited isometric contractions. Power athletes recorded higher values than endurance athletes for the following variables: pre-exercise isometric maximal voluntary contraction (MVC), isokinetic MVC, rate of mechanical fatigue during isokinetic contractions, pre - post exercise variations and recovery times of conduction velocity and mean power frequency, and lactate concentrations. Moreover, conduction velocity overshooting was observed in endurance athletes during the recovery phase after exercise. The correlation analyses showed that the higher the rate of mechanical fatigue, the higher the lactate production and the reduction in conduction velocity due to the exercise.     

Evaluating Teacher-Leaders for Careers as Administrators: Effects of Job Attributes, Teacher Leader Role, and Teaching Assignment Area

Recruitment of public school administrators is an important issue due to the shortage of qualified job applicants nationwide. The shortage of applicants requires school districts to evaluate their internal pools of potential applicants for administrative vacancies. This evaluation research addressed the recruitment of teacher-leaders to serve as assistant principals (APs) using a recruitment simulation technique. The participants were secondary school teacher-leaders who were counselors, school council members, department chairs, or resource teachers. The evaluation technique used involved an innovative experimental design approach. Teacher-leaders, whose current or past primary teaching assignment was in the core content areas (e.g., English/language arts, mathematics, science, social studies), rated the job of AP highest. Resource teachers rated the job significantly higher when the AP job emphasized instruction than when the job emphasized discipline. Implications for recruitment practice and future research are discussed.     

Deprivation level and choice in pigeons: a test of within-trial contrast

Within-trial contrast has been proposed as a mechanism underlying preferences for stimuli that follow relatively more aversive events over stimuli that follow less aversive events. In this study, we manipulated deprivation level to test within-trial contrast predictions. In Experiment 1, pigeons encountered two discriminative stimuli, one presented when they were deprived and the other when they were prefed. When later given a choice between the two stimuli, pigeons strongly preferred the stimulus encountered when deprived, independently of their deprivation level at test. In Experiment 2, pigeons learned two simultaneous discriminations, one when deprived and the other when prefed. Here, subsequent tests between the two S⁺ or the two S⁻ stimuli revealed no consistent preferences. These contrasting findings suggest that differential aversiveness is necessary but not sufficient to induce preferences via within-trial contrast.     

支持多种产品的移动学习管理系统

本文介绍的Porta-bile项目正在特伦托大学(University of Trento)开展,旨在研究移动计算技术在教育环境中对学习过程的支持作用.这个项目主要关注移动学习中的技术因素,它们与e-Learning系统的整合以及与学术机构的信息系统的整合.这个项目是建立在特伦托大学经济学院使用的e-learning学习平台的大量源代码研究以及对整个特伦托大学使用的新平台所收集的大量经验和数据基础上.     

Why do students leave university? Qualitative research at an Italian higher education institution

In this article, we discuss the results of qualitative research carried out at an Italian university for shedding light on the transition students undergo on entry to university, and for understanding associated difficulties that lead to student drop out. We use Vincent Tinto's and Pierre Bourdieu's theoretical apparatuses for analysing drop out in higher education as a process in which inequalities are expressed and reproduced. The intertwined social and institutional mechanisms, and flawed decision-making processes, that precede entry to university are explored. Particular attention is given to student perceptions of their experiences at university and the factors leading to progressive disengagement and drop out. The empirical material analysed shows that, although access to university is relatively easy within the Italian context, hurdles to the pursuit of a university education are largely hidden. Students who withdraw are those who are unable to embody the codes, rules and functioning of higher education: those who do not manage to internalise the type of disciplined autonomy needed for responding to academic demands. Personal characteristics and background resources are key for enabling students to fit in the academic environment. The ways in which higher education institutions regulate access and structure university life contribute to drop out processes and unequal pathways based on the social background of students. Following Coulon, we conclude by arguing that higher education institutions should develop systemic approaches that commit their structure and personnel to the goal of developing a “pedagogy of affiliation” aimed at fostering—particularly among students from underprivileged backgrounds—the cognitive, social and practical skills needed to prosper in higher education.