Economic Deprivation and Early Childhood Development   总被引：53，自引：0，他引：53  

Greg J. Duncan  Jeanne Brooks-Gunn  Pamela Kato Klebanov 《Child development》1994,65(2):296-318

We consider 3 questions regarding the effects of economic deprivation on child development. First, how are developmental outcomes in childhood affected by poverty and such poverty correlates as single parenthood, ethnicity, and maternal education? Second, what are the developmental consequences of the duration and timing of family economic deprivation? And, third, what is the comparative influence of economic deprivation at the family and neighborhood level? We investigate these issues with longitudinal data from the Infant Health and Development Program. We find that family income and poverty status are powerful correlates of the cognitive development and behavior of children, even after accounting for other differences—in particular family structure and maternal schooling—between low- and high-income families. While the duration of poverty matters, its timing in early childhood does not. Age-5 IQs are found to be higher in neighborhoods with greater concentrations of affluent neighbors, while the prevalence of low-income neighbors appears to increase the incidence of externalizing behavior problems.  相似文献   

Translating words into equations: a cognitive load theory approach     

Duncan Pawley  Paul Ayres  Martin Cooper  John Sweller 《教育心理学》2005,25(1):75-97

The conditions under which explicit instruction in checking, combined with worked examples, may be beneficial in learning how to translate sentences into algebraic equations was examined from the perspective of cognitive load theory. In two experiments it was shown that Grade 8 and 9 students were initially disadvantaged by the inclusion of a checking method. However, after a more substantial period of acquisition, students with a low level of mathematical knowledge performed significantly better after receiving checking instructions than those who did not receive checking instructions. In contrast, higher knowledge students were continually disadvantaged by the inclusion of a checking method. The positive effect of checking for lower knowledge students and the negative effect for higher knowledge students in this domain is a further example of the expertise reversal effect.  相似文献   

A Study of Two Instructional Sequences Informed by Alternative Learning Progressions in Genetics     

Ravit Golan Duncan  Jinnie Choi  Moraima Castro-Faix  Veronica L. Cavera 《Science & Education》2017,26(10):1115-1141

Learning progressions (LPs) are hypothetical models of how learning in a domain develops over time with appropriate instruction. In the domain of genetics, there are two independently developed alternative LPs. The main difference between the two progressions hinges on their assumptions regarding the accessibility of classical (Mendelian) versus molecular genetics and the order in which they should be taught. In order to determine the relative difficulty of the different genetic ideas included in the two progressions, and to test which one is a better fit with students’ actual learning, we developed two modules in classical and molecular genetics and alternated their sequence in an implementation study with 11th grade students studying biology. We developed a set of 56 ordered multiple-choice items that collectively assessed both molecular and classical genetic ideas. We found significant gains in students’ learning in both molecular and classical genetics, with the largest gain relating to understanding the informational content of genes and the smallest gain in understanding modes of inheritance. Using multidimensional item response modeling, we found no statistically significant differences between the two instructional sequences. However, there was a trend of slightly higher gains for the molecular-first sequence for all genetic ideas.  相似文献   

The significance of context for curriculum development in engineering education: a case study across three African countries     

Jennifer M. Case  Duncan M. Fraser  Anil Kumar  Ambrose Itika 《European Journal of Engineering Education》2016,41(3):279-292

Curriculum reform is a key topic in the engineering education literature, but much of this discussion proceeds with little engagement with the impact of the local context in which the programme resides. This article thus seeks to understand the influence of local contextual dynamics on curriculum reform in engineering education. The empirical study is a comparative analysis of the context for curriculum reform in three different chemical engineering departments on the African continent, located in Kenya, Tanzania and South Africa. All three departments are currently engaged in processes of curriculum reform, but the analysis shows how the different contexts in which these efforts are taking place exert strong shaping effects on the processes and outcomes for that reform.  相似文献   

The Effects of <Emphasis Type="Italic">Positive Action</Emphasis> on Preschoolers’ Social–Emotional Competence and Health Behaviors     

Sara A. Schmitt  Kendra M. Lewis  Robert J. Duncan  Irem Korucu  Amy R. Napoli 《Early Childhood Education Journal》2018,46(1):141-151

Children from low-income families are at greater risk for poor social–emotional development and physical health and may be in need of intervention. This study examined the extent to which the Positive Action (PA) preschool lessons improved low-income children’s social–emotional competence and health behaviors. Mixed findings emerged with regard to whether the lessons facilitated growth in child outcomes. Results showed positive effects of PA on children’s directly assessed social problem solving skills and their parent-rated social–emotional competence and health behaviors. Unexpectedly, program effects on teacher ratings of social–emotional competence were in the opposite direction. These findings provide preliminary evidence that PA may be effective in promoting positive social–emotional and health behavior outcomes for children, particularly when outcomes are assessed directly and by parents.  相似文献   

Learning Science Concepts by Teaching Peers in a Cooperative Environment: A Longitudinal Study of Preservice Teachers     

José-Reyes Ruiz-Gallardo  Duncan Reavey 《学习科学杂志》2019,28(1):73-107

Misconceptions of science principles are frequent among university students. This is particularly problematic in teacher education, as these misconceptions can be passed on by teachers to pupils at school. In this study, 40 preservice teachers studied 8 common misconceptions by 3 different approaches: learning by teaching (LbT) and learning from peers (LfP; both organized in cooperative groups and using self-developed activities) and conventional lecturing. Participants’ understanding was evaluated prior to, 1 month after, and 2 years after instruction, together with their views on the effectiveness of these methods for achieving learning. The 3 approaches improved scores on all posttests, but LbT achieved the best results. This coincided with perceptions of the participants who gave diverse reasons for the success of LbT. For lecturing, the longitudinal perspective showed that gains in student learning at 1 month had partially declined by 2 years, even though there was still a medium effect size compared to the pretest. However, for LbT and LfP gains remained statistically stable throughout. A combination of these methods might not only contribute efficiently to conceptual change for a good number of misconceptions but also connect teacher education to an almost real school classroom, giving opportunities to translate student learning into teaching practice.  相似文献   

Designing multimedia materials: A learning experience for all of us   总被引：1，自引：0，他引：1  

John Lidstone  Margot Duncan 《The Australian Educational Researcher》1996,23(3):13-27

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Reasoning across ontologically distinct levels: Students' understandings of molecular genetics   总被引：1，自引：0，他引：1  

Ravit Golan Duncan  Brian J. Reiser 《科学教学研究杂志》2007,44(7):938-959

In this article we apply a novel analytical framework to explore students' difficulties in understanding molecular genetics—a domain that is particularly challenging to learn. Our analytical framework posits that reasoning in molecular genetics entails mapping across ontologically distinct levels—an information level containing the genetic information, and a physical level containing hierarchically organized biophysical entities such as proteins, cells, tissues, etc. This mapping requires an understanding of what the genetic information specifies, and how the physical entities in the system mediate the effects of this information. We therefore examined, through interview and written assessments, 10th grade students' understandings of molecular genetics phenomena to uncover the conceptual obstacles involved in reasoning across these ontologically distinct levels. We found that students' described the genetic instructions as containing information about both the structure and function of biological entities across multiple organization levels; a view that is far less constrained than the scientific understandings of the genetic information. In addition, students were often unaware of the different functions of proteins, their relationship to genes, and the role proteins have in mediating the effects of the genetic information. Students' ideas about genes and proteins hindered their ability to reason across the ontologically distinct levels of genetic phenomena, and to provide causal mechanistic explanations of how the genetic information brings about effects of a physical nature. © 2007 Wiley Periodicals, Inc. J Res Sci Teach 44: 938–959, 2007  相似文献   

Family poverty, welfare reform, and child development   总被引：21，自引：0，他引：21  

Duncan GJ  Brooks-Gunn J 《Child development》2000,71(1):188-196

Our review of research suggests that family poverty has selective effects on child development. Most important for policy are indications that deep or persistent poverty early in childhood affects adversely the ability and achievement of children. Although the 1996 welfare reforms have spurred many welfare-to-work transitions, their time limits and, especially, sanctions are likely to deepen poverty among some families. We suggest ways policies might be aimed at preventing either economic deprivation itself or its effects.  相似文献   

The pension subsidy of educational inequality     

Cheryl Duncan  Michael Lovell 《Economics of Education Review》1989,8(4)

Public school teachers receive on retirement a pension typically equaling 75% of the average salary earned during the three peak years. While the teachers pay part of the costs of their defined benefit pension through payroll deductions, most of the cost is subsidized by the state. The pension subsidy, a far from neglible component of the per pupil cost of instruction, is particularly high in those school districts that pay high salaries and enjoy low student/teacher ratios. It is a regressive subsidy highly correlated with school district income and wealth. Several alternative reform measures are considered.  相似文献