首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献，搜索用时 15 毫秒
1.
The current study estimated the causal links between preschool mathematics learning and late elementary school mathematics achievement using variation in treatment assignment to an early mathematics intervention as an instrument for preschool mathematics change. Estimates indicate (n = 410) that a standard deviation of intervention‐produced change at age 4 is associated with a 0.24‐SD gain in achievement in late elementary school. This impact is approximately half the size of the association produced by correlational models relating later achievement to preschool math change, and is approximately 35% smaller than the effect reported by highly controlled ordinary least squares (OLS) regression models (Claessens et al., 2009; Watts et al., 2014 ) using national data sets. Implications for developmental theory and practice are discussed.  相似文献   

2.
van der Goot et al. (2014) proposed that distal, deictic communication indexed the appreciation of the psychological state of a common ground between a signaler and a receiver. In their study, great apes did not signal distally, which they construed as evidence for the human uniqueness of a sense of common ground. This study exposed 166 chimpanzees to food and an experimenter, at an angular displacement, to ask, “Do chimpanzees display distal communication?” Apes were categorized as (a) proximal or (b) distal signalers on each of four trials. The number of chimpanzees who communicated proximally did not statistically differ from the number who signaled distally. Therefore, contrary to the claim by van der Goot et al., apes do communicate distally.  相似文献   

3.
In teaching introductory quantitative methods in sociology, I have used a controversial survey of mortality in Iraq before and after the 2003 invasion to highlight to students the power of simple questionnaires, the role of ambiguity in statistics and the place of politics in the framing of statistical results. This brief report summarizes Roberts et al.'s (2004) estimate that the invasion of Iraq resulted in 98,000 (95% CI = 8000–194,000) deaths, as well as the intriguing reaction that the survey received in the press. Statistics teachers should find the Roberts et al. study to be an effective way to introduce students to more controversial – and political – aspects of statistical research.  相似文献   

4.
This study addresses replication in candidate gene × environment interaction (cG×E) research by investigating if the key findings from Brody, Beach, Philibert, Chen, and Murry (2009) can be detected using data (N = 1,809) from the PROSPER substance use preventive intervention delivery system. Parallel to Brody et al., this study tested the hypotheses that substance misuse initiation would increase faster from age 11 to age 14 and be higher at age 14 among: (a) 5‐HTTLPR short carrier adolescents versus long homozygotes, (b) control versus intervention adolescents, and (c) 5‐HTTLPR short carriers in the control condition versus all other participants. The hypotheses were generally supported and results were consistent with Brody et al.'s cG×I finding. Results are discussed in light of replication issues in cG×E research and implications for intervention.  相似文献   

5.
How is number‐concept acquisition related to overall language development? Experiments 1 and 2 measured number‐word knowledge and general vocabulary in a total of 59 children, ages 30–60 months. A strong correlation was found between number‐word knowledge and vocabulary, independent of the child’s age, contrary to previous results (D. Ansari et al., 2003). This result calls into question arguments that (a) the number‐concept creation process is scaffolded mainly by visuo‐spatial development and (b) that language only becomes integrated after the concepts are created (D. Ansari et al., 2003). Instead, this may suggest that having a larger nominal vocabulary helps children learn number words. Experiment 3 shows that the differences with previous results are likely due to changes in how the data were analyzed.  相似文献   

6.
Guided by the integrative model (García Coll et al., 1996), this study examines prospective associations between perceived ethnic discrimination by peers, parental support, and substance use from 7th to 11th grades (Mage = 12.3–16.3 years) in a community sample of 674 Mexican-American adolescents. Results from a cross-lagged panel model indicate that discrimination predicts relative increases in adolescent substance use. Results also revealed a transactional relation between substance use and supportive parenting over time. Supportive parenting was associated with reductions in substance use, but adolescent substance use also predicted lower levels of later parental support. The findings suggest reducing discrimination by peers and supportive parenting as potential targets for intervention in the prevention of substance use.  相似文献   

7.
A critical step in problem-based learning (PBL) units occurs when groups present their solution to the central problem. This is challenging for middle school students because it involves the creation of an evidence-based argument (Krajcik et al., Journal of the Learning Sciences 7:313–350, 1998). Using a mixed method design, this study investigated (a) the impact of computer-based argumentation scaffolds on middle school students’ argumentation ability, and (b) what middle school students used for support and why during a PBL unit. Data sources included persuasive presentation rating scores, argument evaluation ability test, videotaped class sessions, and prompted interviews. Results included a significant impact on average-achieving students’ argument evaluation ability, and use of the scaffolds by the small groups to plan their research and keep organized.  相似文献   

8.
This study examines the peer effects of domestic violence within school classrooms. Thus, it builds on the findings of Carrell and Hoekstra (2010) and Carrell et al. (2018) and expands them in two aspects. First, we focus our attention in less extreme cases of domestic violence than those that get reported to public institutions. Second, we also study the peer effects of domestic violence over a novel set of outcomes: internalizing behaviors and forms of violence at school. We show that being in a classroom with peers exposed to domestic violence leads to increased dropout rates; increased levels of depression, victimization from bullying and attitudes towards violence at school; and lower verbal and math test scores. Our findings are mainly driven by the extensive margin of exposure to physical violence (i.e. additional students affected by average violence within the classroom).  相似文献   

9.
A major element in the creation of the European area of higher education is the adoption of a common structure of degrees, implying in several countries the reduction of the duration of the first degree to 3 years, which is a controversial change. Cardoso et al. (CESifo Econ Stud 54(2): 229–247, 2008) have analyzed student confidence in the curricula change, quantifying its impact on students’ first choices of academic programs. This paper goes two steps further. First, it concentrates on a variable that better translates total demand for an academic program, namely the total number of students who place the program among their six revealed preferences, instead of just the first option; and, second, an econometric model that better fits the data is estimated. Results confirm a positive impact of the Bologna process on the demand for programs, which varies with program size and across fields of study. Our results complement those in Cardoso et al. (2008), as they uncover that being a program leader, i.e. the only institution in the country that restructured a given program, was associated with higher demand by prospective students, which nevertheless stemmed from their “second best" options and not from their first choices.
Carla SáEmail:
  相似文献   

10.
A comparative analysis of English in the primary curricula of England and Australia reveals markedly different policy perspectives of the functions and purposes of language, literacy and literature in these two Anglophone countries. Whilst the Australian curriculum incorporates ‘the basics’ with broader socio‐linguistic views of language in an attempt to construct breadth and balance, the English curriculum is predominantly a didactic adherence to ‘the old basics’. Using discourse and content analysis, a systematic review of the two curricula is undertaken and evaluated by applying Cox's five models of English and Kalantzis et al.'s four paradigms of literacy. The results of this study have important implications for teachers, academics and policy‐makers in all Anglophone countries, especially the two countries that are the focus of the study.  相似文献   

11.
Children adopted from institutions have been studied as models of the impact of stimulus deprivation on cognitive development (Nelson, Bos, Gunnar, & Sonuga‐Barke, 2011), but these children may also suffer from micronutrient deficiencies (Fuglestad et al., 2008). The contributions of iron deficiency (ID) and duration of deprivation on cognitive functioning in children adopted from institutions between 17 and 36 months of age were examined. ID was assessed in 55 children soon after adoption, and cognitive functioning was evaluated 11–14.6 months postadoption when the children averaged 37.4 months old (SD = 4.9). ID at adoption and longer duration of institutional care independently predicted lower IQ scores and executive function (EF) performance. IQ did not mediate the association between ID and EF.  相似文献   

12.
This paper reports on the findings of a visual text analysis of selected infographics and data visualisations used in  news websites during the COVID-19 pandemic in Sydney, Australia. Infographics and data visualisations used in news website articles disseminated and communicated local and national information to the public about the COVID-19 pandemic and related social implications. For the first time live data, animation and interaction were used in reporting health and societal information to a general news readership, contributing to the knowledge base and visual literacy of the public. The information presented was not only clear but also aesthetically appealing. This paper examines the styles of news digital infographics and data visualisation of three longitudinal studies using lessons learned from Grainger et al. (2016), Dick (2020) and Tufte (2001) and contextualises the context, narrative, aesthetics, communication, data, functionality and examines the collaboration between communication designers, journalists and the development team. The implications for communication design education are explored in the context of skills, tools and teamwork needed for future communication design students.  相似文献   

13.
We explored the professional identity development of nine international counseling doctoral students. Our findings broadly corroborated Dollarhide et al.’s general model but revealed further nuances that need to be carefully contextualized at the intersection of a constellation of identities and experiences that international students bring to the counseling profession.  相似文献   

14.
This research investigates university students’ determinations of credibility of information on Web sites, confidence in their determinations, and perceptions of Web site authors’ vested interests. In Study 1, university-level computer science and education students selected Web sites determined to be credible and Web sites that exemplified misrepresentations. Categorization of Web site credibility determinations indicated that the most frequently provided reasons associated with high credibility included information focus or relevance, educational focus, and name recognition. Reasons for knowing a Web site’s content is wrong included lack of corroboration with other information, information focus and bias. Vested interests associated with commercial Web sites were regarded with distrust and vested interests of educational Web sites were not. In Study 2, credibility determinations of university students enrolled in computer science courses were examined for 3 provided Web sites dealing with the same computer science topic. Reasons for determining Web site inaccuracy included own expertise, information corroboration, information design and bias. As in Study 1, commercial vested interests were negatively regarded in contrast to educational interests. Instructional implications and suggestions for further research are discussed. Preliminary results from Study 1 were presented as a poster entitled “Users’ Confidence Levels and Strategies for Determining Web Site Veracity” (Iding et al. 2002a) and appeared in associated proceedings for The WWW 2002: The Eleventh International World Wide Web Conference, in Honolulu, Hawaii. Preliminary results from Study 2 were presented as a paper entitled, “Judging the Veracity of Web Sites” (Crosby et al. 2002) and appeared in associated proceedings for the International Conference on Computers in Education (ICCE 2002) in Auckland, New Zealand.  相似文献   

15.
With an increase in the number of online tests, the number of interruptions during testing due to unexpected technical issues seems to be on the rise. For example, interruptions occurred during several recent state tests. When interruptions occur, it is important to determine the extent of their impact on the examinees' scores. Researchers such as Hill and Sinharay et al. examined the impact of interruptions at an aggregate level. However, there is a lack of research on the assessment of impact of interruptions at an individual level. We attempt to fill that void. We suggest four methodological approaches, primarily based on statistical hypothesis testing, linear regression, and item response theory, which can provide evidence on the individual‐level impact of interruptions. We perform a realistic simulation study to compare the Type I error rate and power of the suggested approaches. We then apply the approaches to data from the 2013 Indiana Statewide Testing for Educational Progress‐Plus (ISTEP+) test that experienced interruptions.  相似文献   

16.
Despite acknowledging the complex nature of vocabulary knowledge, researchers have rarely investigated the dimensionality of this construct empirically. This study was designed to test a multi-dimensional model of English vocabulary knowledge for sixth-grade students from linguistically diverse backgrounds (n = 584). Participants included language minority students learning English as a second language (L2) and students who learned English as a first language (L1). Students were assessed on 13 reading-based measures tapping various aspects of vocabulary knowledge. Using multiple-group confirmatory factor analysis, we found that vocabulary was comprised of three highly related, but distinct dimensions—breadth, contextual sensitivity, and morphological awareness. This three-dimensional model was found to hold for L2 learners as well as L1 speakers. Although the L2 learners were statistically significantly lower than the L1 students on all three dimensions, the magnitude of the difference for morphological awareness (d = .37) was somewhat smaller than that for vocabulary breadth (d = .52) and contextual sensitivity (d = .49). Results were similar for a subsample of Spanish-speaking L2 learners and for the full sample of L2 learners from various home language groups. Findings support a distinction between word-specific and word-general knowledge in understanding individual and group differences in vocabulary.  相似文献   

17.
Is earlier intervention always superior? Using two complementary forms of meta-analysis, Gardner and colleagues find no support for the “earlier is better” hypothesis in outcomes of parenting programs for child behavior problems across the 2–11 year age range. This commentary explores possible methodological and substantive reasons for the pattern of their findings. We need additional careful analyses of this kind, assessing age variations in intervention effects across broader age ranges, and in other developmental domains, for strong tests of the “earlier is better” hypothesis. At this stage, however, Gardner et al.'s findings give us some pause for thought.  相似文献   

18.
Developmental Changes in Executive Functioning   总被引：1，自引：0，他引：1  
Although early studies of executive functioning in children supported Miyake et al.'s (2000) three‐factor model, more recent findings supported a variety of undifferentiated or two‐factor structures. Using a cohort‐sequential design, this study examined whether there were age‐related differences in the structure of executive functioning among 6‐ to 15‐year‐olds (N = 688). Children were tested annually on tasks designed to measure updating and working memory, inhibition, and switch efficiency. There was substantial task‐based variation in developmental patterns on the various tasks. Confirmatory factor analyses and tests for longitudinal factorial invariance showed that data from the 5‐ to 13‐year‐olds conformed to a two‐factor structure. For the 15‐year‐olds, a well‐separated three‐factor structure was found.  相似文献   

19.
The study of how children learn numbers has yielded one of the most productive research programs in cognitive development, spanning empirical and computational methods, as well as nativist and empiricist philosophies. This paper provides a tutorial on how to think computationally about learning models in a domain like number, where learners take finite data and go far beyond what they directly observe or perceive. To illustrate, this paper then outlines a model which acquires a counting procedure using observations of sets and words, extending the proposal of Piantadosi et al. (2012). This new version of the model responds to several critiques of the original work and outlines an approach which is likely appropriate for acquiring further aspects of mathematics.  相似文献   

20.
Acquisition of an argument structure may be affected by the diversity of lexical types that appear in that structure (Conwell et al., 2011; Yang, 2016). Seventy-two 5- and 6-year-old English-speaking children completed a learning study where they were exposed to a novel argument structure and then tested on their ability to comprehend it. The number of verb types heard in the learning phase did not predict comprehension at test. However, learning with only full noun phrase arguments resulted in lower comprehension of the structure, particularly with pronouns. Hearing pronouns during learning supported comprehension of all argument types at test. These results indicate that pronominal arguments support argument structure learning by providing multiple cues that can facilitate thematic role assignment.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号