Using the Internet for teaching and learning has become a trend in modern higher education, facilitated through the exploitation of advanced computing technologies. Virtual Learning Environment (VLE) applications support online learning over the Internet, and VLEs have thus emerged as e-learning domains that are essential prerequisites in cutting edge design and implementation technologies in education. Service Oriented Computing (SOC), as a novel software development and implementation approach, has become an active area of research and development. Web services, as an example of SOC, support the integration of software applications in an incremental way, using existing platforms and languages that utilize and adopt existing legacy systems. Thus, VLEs should be particularly well suited to Web services through the SOC approach. VLE services is a field subjected to continuous development but VLEs as Web services are still not generally accessible for academic institutions, although they have been adopted by some scientific projects. The next generation of VLEs should address the limitations of the current online systems by providing a richer context for online learning, one that is sensitive to the specific domain requirements of e-learning. Web Services Matching and Selection (WSMS), as a part of the functional requirements of Web services, has received less attention from SOC researchers. It involves discovering a set of semantically equivalent services by filtering a set of available services based on service metadata, and instantaneously selecting the best possible service. WSMS is the discovery of a service by a user, where correspondence is established between the objectives of the consumer and the capabilities of the service. It thereby aims to match and select the optimal service that best meets the requestor's needs. The main aim of this doctoral work is to explore novel architectural designs for VLEs, based on the SOC paradigm and its related techniques. In addition, this investigation aims to extend the core ideas behind VLE tools, which are gradually becoming dominant within academic institutes. Another aim is to devise a policy- based technique to enforce security requirements for VLEs and to build a test-bed for VLE security based on Modular Moodle. The fundamental contribution of this thesis that it demonstrates that VLEs can be considered as services, which can be published, discovered and composed as perceived in the SOC paradigm. An additional contribution to the knowledge is that it has built a new extension to the structure of Web services: the Web Services Matching and Selection (WSMS) system. Another contribution to the knowledge is that traditional security requirements have been modified to cater for the highly mobile and changeable environment of VLEs; this has been achieved through policy- based techniques. These contributions to the body of knowledge have been published in learned journals and at conferences.

Adaptive tutorial dialogues have been successfully employed by ITSs to facilitate deep learning of conceptual domain knowledge. But none of the approaches used for generating dialogues have been used across instructional domains and tasks. The objective of this project was twofold: (i) to propose a general model that provides adaptive dialogue support in both well- and ill-defined instructional tasks (ii) to explore whether adaptive tutorial dialogues are better than non-adaptive dialogues in acquiring domain knowledge. Our model provides adaptive dialogue support by identifying the concepts that the student has most difficulty with, and then selecting the tutorial dialogues corresponding to those concepts. The dialogues are customised based on the student’s knowledge and explanation skills, in terms of the length and the exact content of the dialogue. The model consists of three parts: an error hierarchy, tutorial dialogues and rules for adapting them. We incorporated our model into EER-Tutor, a constraint-based tutor that teaches database design. The effectiveness of adaptive dialogues compared to non-adaptive dialogues in learning this ill-defined task was evaluated in an authentic classroom environment. The results revealed that the acquisition of the domain knowledge (represented as constraints) of the experimental group who received adaptive dialogues was significantly higher than their peers in the control group with non-adaptive dialogues. We also incorporated our model into NORMIT, a constraint-based tutor that teaches data normalization. We repeated the experiment using NORMIT in a real-world class room environment with a much smaller group of students (18 in NORMIT study vs 65 in EER-Tutor study) but did not find significant differences. We also investigated whether our model could support dialogues in logical database design and fraction addition using paper-based methods. Our evaluation studies and investigations on paper indicated that our model can provide adaptive support for both ill-and well-defined tasks associated with a well-defined domain theory. The results also indicated that adaptive dialogues are more effective than non-adaptive dialogues in teaching the ill-defined task of database design.

The research reported in this dissertation investigates the impact that accountability systems have on the design and development of student centered learning environments. The nature of student-centered learning environments (SCLEs) in this study is framed theoretically by cultural historical activity theory (CHAT). The investigation itself occurred within a specific practice context: an urban charter school serving elementary-aged children. The efforts to design and develop SCLEs in the school focused on the use of improvement inquiry by groups of stakeholders organized into a developing human ecology in educational contexts called networked improvement communities. The research sought to determine (1) how accountability systems influenced instructional practices within the school and (2) how practicing teachers perceived the assessments embedded within the accountability systems. Data were collected via surveys, interviews, and a focus group. The data from the surveys and interviews informed the work for the focus group. The work from the focus group generated a stakeholder-generated “theory of practice improvement” in the form of an illustrative driver diagram. The driver diagram contributed an empirically generated proposal for how improved instructional practices might be pursued at the school. The investigation concluded with recommendations for implementing the plan within the school and recommendations to the broader field of education to engage more deeply in improvement inquiry. / School of Education; / Professional Doctorate in Educational Leadership (ProDEL) / EdD; / Dissertation;

Changes in the field of education require teachers’ acquisition of specific knowledge of technology and the skills of its effective use in the classroom. With the expansion of the traditional classroom to include virtual learning environments, concern still exists regarding characteristics necessary for quality teaching and learning.<br> This research is an examination of pre-service teachers’ needs relevant to integrating technology in an online learning environment. It is a first step toward acknowledging the responsibility teacher preparation programs have in the formation of educators equipped to instruct in dual learning environments, thus providing pre-service teachers with opportunities and experiences to become fluent in the technological pedagogical content knowledge (TPACK) required for online learning environments as well as the traditional face-to-face instruction. <br> The purpose of this study was to determine if active engagement with content of an online instruction module would affect the attitudes, knowledge and skills, and instructional centeredness of pre-service teachers’ towards technology integration in an online learning environment. A mixed-methods concurrent triangulation design procedure was utilized to measure characteristics of pre-service teachers in a teacher preparation program. A two-way within-subjects analysis of variance was conducted to evaluate the effect of engagement with the content of the online instruction module for all three domains. Participants began the intervention with limited knowledge and skills of technology integration and online learning environments; however, they made statistically significant gains upon completion of the intervention. The implementation of an intervention such as this online instruction module may support other teacher preparation programs in identifying strengths and weaknesses of their pre-service teachers and provide valuable information necessary to guide program goals. / School of Education; / Instructional Technology (EdDIT) / EdD; / Dissertation;

The thesis investigated the use of combination of sections using learning steps in the development of courseware presentation in the 3D Virtual Worlds platform. The technical objective of the study is to present the design of multisection strategy in developing healthcare course in 3D Virtual World online environment. The main aim of this study is to know the effects of multisection [objective, tutorial (with or without video), quiz and test] sections incorporation in an online 3D Virtual World towards the usability. The empirical research described in this thesis comprised three experimental phases. In the first phase, an initial experiment was carried out with 21 users to explore the usability and learning performance of courseware created using 3D the Virtual World platform of Second Life. The second experiment phase involved an experiment conducted with 30 users to investigate their perception, satisfaction and performance of the role of each main section involved in Virtual World courseware. In the third phase, a total of 30 users experimentally examined a unique approach to the use of video segment added in the Tutorial section of the OTQT framework. The overall obtained results demonstrated the usefulness of the tested multisection to enhance the development of healthcare course in an online learning of 3D Virtual World program. These results in three experiments provided a set of unique and empirically derived guidelines for the design and the use of three multisection frameworks to generate more usable courseware in the 3D Virtual Worlds of an online learning interface. For example, when designing avatars as animated virtual lecturers in e-learning interfaces, specific facial expression and body gestures should be incorporated due to its positive influence in enhancing learners' attitude towards the learning process.

A expansão da modalidade de Educação a Distância (EAD) e a presença cada vez maior das Tecnologias de Informação e Comunicação (TIC) na educação, tornam a utilização de ferramentas computacionais imprescindíveis no auxílio aos professores, tanto para produção de conteúdos digitais, quanto na tarefa de avaliação do aprendizado. A avaliação do aprendizado acarreta muito trabalho ao professor, principalmente aquelas de caráter formativo, que favorecem o desenvolvimento continuado do aprendizado dos alunos. Uma forma de aliviar essa carga de trabalho tem sido a utilização dos Sistemas Gerenciadores de Curso (SGC). Dentre esses sistemas encontra-se o Moodle, que disponibiliza o módulo Quiz, que dispõe de recursos para avaliações automáticas. Contudo seu uso não é simples, sendo frequentes as reclamações de professores quanto a sua usabilidade, o que pode desmotivar seu uso. Nesse contexto, o objetivo do presente trabalho é ajudar a compreender e reduzir as dificuldades enfrentadas por professores no emprego do módulo Quiz do Moodle. Para isso foi realizado um estudo para identificar os principais elementos que interferem na usabilidade de ferramentas para autoria de questionários online. Os resultados obtidos foram utilizados para modelar e produzir um protótipo alternativo ao do módulo Quiz, denominado de iQuiz, que resultou na seguinte contribuição tecnológica: uma interface para aplicação sobre o núcleo do Quiz e um modelo para integração dos componentes envolvidos na composição do novo ambiente. Para a criação do protótipo foi aplicado a abordagem de desenvolvimento centrado no usuário, utilizando testes de usabilidade em conjunto com outros métodos, tais como avaliação heurística. Neste trabalho também apresentamos os resultados de uma avaliação do modelo implementado, indicando uma efetiva melhoria de usabilidade. Tanto especialistas em TIC e professores participantes das avaliações mostraram-se mais confortáveis com o uso do iQuiz, alcançando melhores resultados quanto à produção de questionários. / The expansion of the distance learning education, allied to the ubiquitous presence of the Infor- mation and Communications Technology (ICT) in education, make the use of computational tools essential to the teacher. They are used in the content production, as well to help teacher to assess the students. However, the learning assessment entails a lot of work to the teacher, especially under the model of formative assessments. One way to alleviate this workload, has been the use of Course Management Systems (CMS). Among these systems is Moodle, which provides the Quiz module, used for creating assessments with automatic evaluation. However the Quiz operation is not simple, it is not rare a teacher complains about its usability. In this context, the objective this work is to help understand and reduce the difficulties faced by teachers in the use of Moodle Quiz. To do this, a study was conducted to identify the main elements that influence the usability of tools for online questionnaire authoring. From this study, was defined a model, that generated an alternative environment to the Quiz module, denoted by iQuiz. This resulted in the two technological contribution: an interface for application to the core of the Quiz and a model for integration of components involved in the composition of the new environment. To produce the prototype of iQuiz, was used an approach centered in the user, together with usability tests, among other methods, such as heuristic evaluation. In this work, it is also presented the results of an application of the iQuiz with ICT specialists and teachers, indicating an effective improvement of usability. Both, ICT specialists and teachers, rated iQuiz as comfortable to produce new questionnaires. For the creation of the prototype has been applied to approach to development focused on the user, using usability tests together with other methods, such as heuristic evaluation. This resulted in significant improvement in the quality of the final interface and consequently, greater user satisfaction, an essential factor to motivate them to use the new environment.

A conectividade e interação proporcionada pela web 2.0 permitiu o desenvolvimento de Ambientes Virtuais de Aprendizagem que rapidamente tornaram-se amplamente empregados na educação a distância. Ao mesmo tempo, esta tecnologia vem ganhando espaço como ferramentas de apoio aos processos de ensino-aprendizagem também na educação presencial, em especial na educação superior, favorecendo o desenvolvimento de novas práticas pedagógicas. Assim, torna-se crescente a preocupação com os processos de adoção e difusão da tecnologia. Esta pesquisa objetiva investigar a adoção e a difusão dos Ambientes Virtuais de Aprendizagem em uma Universidade Federal que os disponibiliza para uso facultativo dos docentes. O fenômeno é investigado sob a ótica do adotante – o professor – a partir de uma abordagem multiteórica, valendo-se de elementos e conceitos da Teoria da Difusão da Inovação (IDT), do Modelo de Adoção Baseado em Preocupações (CBAM) e da Teoria Unificada de Aceitação e Uso da Tecnologia (UTAUT). Os resultados indicam um processo de difusão bastante desigual nas instâncias da Universidade, explicado pelas diferentes oportunidades de experimentação mediante incentivos externos e contato com tecnologia ao longo do tempo. Além disso, identificaram-se duas orientações básicas no uso dos ambientes – gestão e aprendizagem – e as respectivas preocupações dos docentes em relação à implementação da inovação. / The connectivity and interaction provided by the Web 2.0 allowed the development of Virtual Learning Environments that quickly became widely used in distance education. Simultaneously this technology has been used as a tool to support teaching and learning also in face-to-face education and it is stimulating the development of new pedagogical practices. Thus there is a growing concern with understanding adoption and diffusion process of virtual environments. This research aims to investigate the adoption and diffusion of this technology in a Federal University which provides it for teachers in a free and optional way. The phenomenon is investigated from the perspective of the adopter – the teacher – using a multitheoretical approach drawing on elements and concepts from the Innovation Diffusion Theory (IDT), Adoption Model Based Concerns (CBAM) and Unified Theory of Acceptance and Use of Technology (UTAUT). The results indicate very unequal diffusion in the University explained by academic units's differences in opportunities of experimentation with the technology by external incentives and contact with it over time. Furthermore, we identified two basic orientations in the use of the e-learning environments – managing and learning – and the faculty concerns regarding the implementation of innovation.

Atualmente, existem vários recursos para catalogar e disponibilizar objetos de aprendizagem em vários padrões de metadados. No entanto, encontramos um problema relacionado ao armazenamento e recuperação de objetos de aprendizagem. Talvez porque os professores/autores não tenham tempo para armazenar seus objetos ou mesmo porque o processo de armazenamento de metadados em um repositório é muito trabalhoso. Como resposta ao problema encontrado é apresentada uma possibilidade de minimizar o mesmo e, pretende-se com a pesquisa facilitar o processo de catalogação e disponibilização dos objetos de aprendizagem através da interoperabilidade da plataforma virtual de aprendizagem Moodle com um repositório de objetos de aprendizagem Cognix. Este trabalho tem como objetivo propor uma ferramenta que permite a catalogação automática de objetos de aprendizagem do Moodle no repositório Cognix. Para tal, foram descritas quatro etapas metodológicas para o desenvolvimento do projeto, bem como para a implementação da ferramenta. Espera-se com esta ferramenta possibilitar a reutilização e o acesso aos objetos de aprendizagem em outros ambientes/sites, garantindo assim a descrição uniforme e completa dos metadados. / Nowadays, there are several resources for cataloging and making available learning objects in various metadata standards. However, we found a problem related to the existence of the storage and retrieval of learning objects. Perhaps because the teachers/authors do not have time to storage their objects or even because the process of storage metadata in a repository is very laborious. As one way to this problem, it is here presented a possibility of minimizing it and with this research we aim to facilitate the process to storage and making available the learning objects through the interoperability of the virtual learning platform Moodle with the repository of Cognix. This work aims to propose a tool that allows the automatic storage of Moodle learning objects in the Cognix repository. For such, four methodological steps were described for the development of the project as well as for the implementation of the tool. This tool is expected rant reutilization and access to learning objects for their users, thus ensuring the uniform and complete description of the metadata.

Virtual learning environments have become prevalent in the workplace to improve talent development. However, because there are so many different types of design options, not all learners are finding success in the virtual learning environment. This mismatch can negatively impact employees' motivation and learning outcomes. The purpose of this study was to explore how design features of a virtual learning environment impacted adult learners' motivation in the workplace. Constructivist and self-determination theories were used as theoretical frameworks. The research question in this study explored how social and external contextual factors influence an adult learner's motivation to learn in a virtual learning environment. A qualitative case study was used to explore the data collected from 8 federal employees who used a virtual learning environment for professional development. Data were collected from interviews, surveys, and direct observations and analyzed using inductive coding to determined patterns and themes for study. The results from the study indicated the participants viewed visual learning, learner control, ease of use, technical competence, instructor support, and technical support as critical factors that must be addressed when using a virtual learning environment to improve talent development. The findings from the study can provide insights that could be used by training developers for how to design virtual learning environments to provide a positive environment. The social change impact will be to improve the virtual learning environments for the federal workforce to improve motivation and create a culture of talent development for individual growth and organizational capabilities.

Past research into defining and measuring the characteristics of learning environments in Science Education Centres and Science Museums (SECSMs) has been based upon low-inference measures, such as observations and interviews. Many searchers feel that the diversity of informal education settings in SECSMs makes it difficult to develop high-inference measures for informal learning environments. This study used the semiformal environment of the CSIRO Science Education Centres as a stepping-stone between formal and informal learning environments. A review of learning environment research identified a possible procedure for the development of, and a format for, a suitable instrument. Research in SECSMs was reviewed to identify learning environment factors that defined the CSIROSEC learning environment. A pilot study was conducted to determine the feasibility of developing a learning environment instrument for CSIROSECs. This led to the more formal process of developing a learning environment instrument for CSIROSECs based upon the five scales of Affect, Social Interaction, Novelty, Independence and Involvement. / A number of cycles of testing of the instrument, statistical analyses, and subsequent refinements resulted in the Learning Environment Instrument for CSIRO Science Education Centres (LEI for CSIROSECs). The instrument measures distinct, if somewhat overlapping, aspects of the learning environment. The LEI for CSIROSECs displays comparable measures for internal consistency (alpha reliability) and discriminant validity to existing learning environment instruments. The sensitivity of the instrument has been demonstrated for the comparison of different classes, comparison of teacher-student perceptions, comparison of primary and secondary classes, and the comparison of CSIROSEC programs. Suggestions have been made for applications of the LEI for CSIROSECs and its further development,as well as its potential use in research.