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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
131

Validity of a Dynamic Spanish Assessment of Phonological Awareness in Emergent Bilingual Children

Wyman Chin, Kelsey R. 29 June 2018 (has links)
Within the current decade, the number of Hispanic students has doubled so that about 16% of the total student population within the United States are Spanish-speakers (U.S. Census Bureau, 2017). With this growing population comes a responsibility to understand and implement best practices for educating these students. Because literacy is a building-block for learning, one integral part of this responsibility consists of developing valid and reliable means of assessing pre-reading skills that are predictive of later reading abilities (Lonigan, Burgess, & Anthony, 2000; Wagner, Torgesen, & Rashotte, 1994). English-language learning children are being identified for having reading difficulties and disabilities two to three years later than their English-proficient peers (Chu & Flores, 2011). As a population, they are also overly misidentified as having reading difficulties/disabilities and being unnecessarily placed into a special education system (McCardle, Mele-McCarthy, Cutting, Leos, & D’Emilio, 2005b; Sanatullova Allison & Robinson-Young, 2016). Per a nationwide survey of Speech-Language Pathologists, one large contributing factor for this dilemma is the lack of appropriate assessment instruments (Roseberry-McKibbin, Brice, & O’Hanlon, 2005). Phonological awareness is the ability to focus on and manipulate units of spoken language (words, syllables, onsets, rimes, and/or phonemes). It is one of the most significant predictors of later reading abilities. A large body of evidence provides support for this within the English language but also within other alphabetic languages, such as Spanish (e.g. Carillo, 1994; Durgunoglu, Nagy, Hancin-Bhatt, 1993; Schneider, Kuspert, Roth, Vise, & Marx, 1997). Thus, assessments of phonological awareness have been shown to be reliable measures that predict later reading abilities in Spanish-speaking children and English-proficient children alike (Farver, Nakamoto, & Lonigan, 2007). There are many standardized assessments available to test phonological awareness as an emergent literacy skill in English. In congruence with the previously mentioned nationwide survey, Spanish assessments of phonological awareness are less abundant. Additionally, these tests tend to be expensive, time-consuming to give, and require training of the administrator. These tests are static in nature and regularly require the child to comprehend complex administrative instructions which is often problematic for children with limited language skills in Spanish and/or English (Barker, Bridges, & Saunders, 2014). The current study aims to build upon existing data regarding development of the DAPA-S by evaluating the validity of a shorter version of the DAPA-S (the DAPA-S Short Form) with children from Spanish-speaking backgrounds. The DAPA-S Short form was designed with the purpose of retaining all the test items of the full version but with an altered structure which allows for significantly shorter administration time. The DAPA-S and the shorter version were both designed as Spanish dynamic assessments of phonological awareness which are computerized, have simple instructions, provide information about a child’s ability to learn from instruction, and do not require speech responses. The twelve participants that were involved in this study were given the DAPA-S Short Form as well as other assessments related to phonological awareness or emergent reading. Three of those participants did not complete the study due to poor attendance or behavioral challenges. Therefore, this study reports on nine participants who completed the full assessment battery. To investigate concurrent validity, correlational analysis was performed with the DAPA-S Short Form scores and scores from a measure of phonological awareness, the Test of Phonological Sensitivity in Spanish (TOPSS; Brea, Silliman, Bahr, & Bryant, 2003). The Elision, Rapid Automatic Naming, and Letter Name/ Letter Sound subtests from the TOPSS were administered. No significant correlations were observed between either subtest from the DAPA-S Short Form and any of the subtests from the TOPSS (r = .49 for Elision, r = .36 for RAN, r = .43 for Letter Name/Letter Sound subtests). Therefore, concurrent validity was not established as measured in this study. To investigate convergent validity, correlational analysis was performed with the DAPA-S Short Form subtests and the scores from a measure of Spanish emergent reading skills, the Letter-word Identification (LWID) subtest from the Woodcock-Muñoz Language Survey – Revised (WMLS-R; Woodcock, Muñoz – Sandoval, Ruef, & Alvarado, 2005). Significant correlation was observed between the First Syllable subtest of the DAPA-S Short Form and the test of emergent literacy (r = .87, p < .01); no significant correlation was observed for the Last Syllable subtest of the DAPA-S Short Form (r = .44) and the test of emergent literacy. Therefore, the First Syllable subtest from the DAPA-S Short Form demonstrates good convergent validity, while the Last Syllable subtest did not. Data suggests that the DAPA-S Short Form demonstrates excellent internal reliability (Cronbach’s alpha = .99 for both subtests) but requires modifications and further testing with a larger sample size in order to be considered as a valid measure of phonological awareness. If developed through further research, the DAPA-S Short Form as well as the full version of the assessment could prove to be invaluable tools in educational and clinical settings.
132

Barns språkutveckling i förskoleklass : - en studie av två pedagogers arbetssätt / Children’s language development in preschool class : - a study of two teachers work methods

Gullback, Melinda, Lindblad, Malin January 2010 (has links)
<p>Forskning visar att det är viktigt för barn i förskoleklass att få språklig stimulering i sin vardag. I vår studie jämförde vi två pedagogers språkstimulerande arbete i två förskoleklasser. Vi ville se om pedagogerna arbetade efter samma metoder som de förespråkade. Därför observerade vi naturliga situationer i två förskoleklasser samt intervjuade en pedagog ur varje klass. Jämförelsen visade att pedagogerna hade kunskap om den språkliga medvetenheten och arbetade medvetet för att stimulera detta hos barnen. De arbetade båda enligt Bornholmsmodellen som är en komplett metod för att öka barns språkliga medvetenhet. Den ena pedagogen arbetade även efter en ny metod kallad FonoMix, en metod som kopplar ihop munrörelser och bokstavsljud. Den andra pedagogen arbetade medvetet med tecken som stöd, då hennes förskoleklass var en språkförskoleklass för barn med språkliga avvikelser.</p>
133

The Copycat Project: An Experiment in Nondeterminism and Creative Analogies

Hofstadter, Douglas 01 January 1984 (has links)
A micro-world is described, in which many analogies involving strikingly different concepts and levels of subtlety can be made. The question "What differentiates the good ones from the bad ones?" is discussed, and then the problem of how to implement a computational model of the human ability to come up with such analogies (and to have a sense for their quality) is considered. A key part of the proposed system, now under development is its dependence on statistically emergent properties of stochastically interacting "codelets" (small pieces of ready-to-run code created by the system, and selected at random to run with probability proportional to heuristically assigned "urgencies"). Another key element is a network of linked concepts of varying levels of "semanticity", in which activation spreads and indirectly controls the urgencies of new codelets. There is pressure in the system toward maximizing the degree of "semanticity" or "intensionality" of descriptions of structures, but many such pressures, often conflicting, must interact with one another, and compromises must be made. The shifting of (1) perceived oundaries inside structures, (2) descriptive concepts chosen to apply to structures, and (3) features perceived as "salient" or not, is called "slippage". What can slip, and how are emergent consequences of the interaction of (1) the temporary ("cytoplasmic") structures involved in the analogy with (2) the permanent ("Platonic") concepts and links in the conceptual proximity network, or "slippability network". The architecture of this system is postulated as a general architecture suitable for dealing not only with fluid analogies, but also with other types of abstract perception and categorization tasks, such as musical perception, scientific theorizing, Bongard problems and others.
134

Creativity barriers in South African higher education institution / Andrea Garnett

Garnett, Andrea January 2005 (has links)
Thesis (Ph.D. (Business Management))--North-West University, Vaal Triangle Campus, 2005.
135

Environmental, behavioural, and cognitive predictors of emergent literacy and reading skills

Stephenson, Kathy 06 1900 (has links)
This thesis consists of three separate papers broadly examining how different environmental and child variables affect language and literacy acquisition in two or more orthographies. The first paper is a quantitative meta-analysis of studies that have examined the effects of shared book reading on language, emergent literacy skills, and reading achievement with preschool children. The results suggest that shared book reading explained approximately 7% of variance in all the language and literacy measures combined. The mean effect size of shared book reading was slightly larger for the combined language measures (d = 0.77) than for the combined emergent literacy measures (d = 0.57), or the combined reading achievement measures (d = 0.63). An examination of the effects of shared book reading on specific language, emergent literacy, and reading skills revealed that shared book reading is more related to some skills than others. The second paper examines the effects of home literacy (shared book reading, teaching activities, and number of books), children’s task-focused behaviour, and parents’ beliefs and expectations about their child’s reading and academic ability on Kindergarten children’s (N = 61) phonological sensitivity and letter knowledge and on Grade 1 word reading. The results showed that after controlling for nonverbal IQ and vocabulary, parent teaching activities prior to Kindergarten predicted significantly letter knowledge; parents’ beliefs about their children’s reading ability predicted significantly phonological sensitivity and Kindergarten word reading; and children’s task-focused behaviour predicted significantly letter knowledge and Kindergarten and Grade 1 word reading The third paper reports on a cross-linguistic longitudinal study that examines the environmental, behavioural, and cognitive predictors of Grade 3 word reading fluency, passage comprehension, and spelling in children learning to read in an orthographically inconsistent language (English) and in an orthographically consistent language (Greek). Results indicated that home literacy factors did not directly predict Grade 3 reading or spelling skills for either the English- or Greek-speaking samples. Task-focused behaviour directly predicted spelling for the Greek-speaking sample. Vocabulary was more important for reading and spelling in English than in Greek. Letter knowledge was more important for spelling in Greek and for passage comprehension in English. / Special Education
136

Colonization of recent coniferous versus deciduous forest stands by vascular plants at the local scale

Wulf, Monika, Heinken, Thilo January 2008 (has links)
Questions: 1. Are there differences among species in their preference for coniferous vs. deciduous forest? 2. Are tree and shrub species better colonizers of recent forest stands than herbaceous species? 3. Do colonization patterns of plant species groups depend on tree species composition? Location: Three deciduous and one coniferous recent forest areas in Brandenburg, NE Germany. Methods: In 34 and 21 transects in coniferous and deciduous stands, respectively, we studied the occurrence and percentage cover of vascular plants in a total of 150 plots in ancient stands, 315 in recent stands and 55 at the ecotone. Habitat preference, diaspore weight, generative dispersal potential and clonal extension were used to explain mechanisms of local migration. Regression analysis was conducted to test whether migration distance was related to species’ life-history traits. Results: 25 species were significantly associated with ancient stands and ten species were significantly more frequent in recent stands. Tree and shrub species were good colonizers of recent coniferous and deciduous stands. In the coniferous stands, all herbaceous species showed a strong dispersal limitation during colonization, whereas in the deciduous stands generalist species may have survived in the grasslands which were present prior to afforestation. Conclusions: The fast colonization of recent stands by trees and shrubs can be explained by their effective dispersal via wind and animals. This, and the comparably efficient migration of herbaceous forest specialists into recent coniferous stands, implies that the conversion of coniferous into deciduous stands adjacent to ancient deciduous forests is promising even without planting of trees.
137

The Making of a Reading Society : Developing a Culture of Reading in Rwanda

Ruterana, Pierre Canisius January 2012 (has links)
Following a growing concern among education stakeholders about the lack of a reading culture and low literacy levels among Rwandans in general and university students in particular, the aim of this thesis is to increase the awareness of Rwandans about the development of a reading culture and early literacy. To achieve this aim, four studies with participants representing different experiences related to reading culture were performed. These qualitative studies draw on different perspectives on the development of a reading culture and emergent literacy by using open-ended questionnaires and interviews. The thesis takes sociocultural and emergent literacy theories as points of departure. The first study investigates students’ reflections on their previous reading experiences, and discuss ways to develop literacy and a reading culture in Rwanda. The next one sheds light on parents’ involvement in literacy practices at home and the third study concerns what literacy knowledge teachers expect from their pupils when they start nursery and lower primary school. An example of a literacy event (storytelling) is given in the fourth study where children’s narratives of fairy tales are followed by their discussions on gender issues, which in turn can develop the children’s interest in reading. This can also help them relate texts to their life and teach them to think critically. In sum, the studies show that there is a limited reading culture in Rwanda. That is attributed to the colonial and post-colonial education system, reliance on verbal communication, limited access to reading materials, and ultimately the low status of the mother tongue Kinyarwanda within the sociolinguistic configuration of Rwanda. Also, the participating students and teachers point out the necessity of involving parents more in the creation of an environment that nurtures children’s emergent literacy development so that it becomes a shared responsibility translated into a teacherparent partnership for children’s success at school. Hence, the findings inform the use of this thesis which is to promote literacy and a reading culture in Rwanda by engaging the whole nation in a national effort to build a sustainable culture of reading. To paraphrase the old African saying ‘it takes a village to raise a child’, I want to conclude by saying that it takes a nation to develop a culture of reading.
138

The impact of virtuality on team functioning: a meta-analytic integration

Seely, Peter W. 14 November 2012 (has links)
Communication technologies have become a central characteristic of workplace functioning. The literature has suggested that the use of these technologies fundamentally changes the manner in which team members interact. The present study sought to reorganize previous research on the impact of virtuality on team emergent states and behavioral processes to elucidate how different degrees of team virtuality shape team functioning, and to investigate the manner in which these relationships differ according to team type, team membership stability, and publication year. Findings from 174 studies (total number of teams = 9204; total N approximately 26,050) suggest that there is not a strong relationship between team virtuality and emergent states and behavioral processes. However, moderator analyses revealed that a reliance on highly virtual tools may be most detrimental to action teams and ad hoc teams. Moreover, findings demonstrate that the degree to which virtuality shapes team transition and action process may be changing over time.
139

Three Essays on the Economics of Climate Change and the Electricity Sector

To, Hong Thi-Dieu 28 September 2011 (has links)
This doctoral thesis contains three essays on the economics of climate change and the electricity sector. The first essay deals with the subject of greenhouse gas (GHG) emissions and economic growth. The second essay addresses the issues of climate change policies, especially the role of the emergent innovative technologies, and the restructuring of the electricity sector. The third essay presents a model of transmission investments in electric power networks. Chapter One studies the impacts of climate change on economic growth in the world economies. The paper contains explicit formalization of the depletion process of exhaustible fossil fuels and the phase of technology substitution. The impacts of climate change on capital flows and welfare across countries are also investigated. The restructuring of the electricity sector is studied in Chapter Two. It also analyzes how climate change policies can benefit from emergent innovative technologies and how emergent innovative technologies can lower GHG emissions. It is shown that the price of electricity is strictly rising before emergent innovative firms with zero GHG emissions enter the market, but strictly declining as the entry begins. In Chapter Three, a model of electricity transmission investments from the perspective of the regulatory approach is formulated. The Mid-West region of Western Australia, a sub-system of the South West Interconnected System is considered. In contrast with most models in the literature that deal only with network deepening, this model deals with both network deepening and network widening. Moreover, unlike the conventional investment models which are static and deal only with the long run, this model is dynamic and focuses on the timing of the infrastructure investments. The paper is a study of an optimal transmission investment program which is part of the optimal investment program for an integrated model in which investments in transmission and investments in generation are made at the same time.
140

Dynamic Categorization: What We Can Learn from the Emergent Arrangement of Physical Artifacts in Libraries

Krauss, Armin Martin 07 January 2011 (has links)
Radio frequency identification (RFID) is a technology used in many applications for the identification of objects. This thesis presents a concept of how libraries could use RFID technology to locate physical items within the library. The ability to locate items within the library changes the way users interact with physical material, creates new ways of user collaboration, and influences the ability to browse the shelves for physical items. Several implementation scenarios are presented in detail and implications on collaboration and browsing are analyzed.

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