Spelling suggestions: "subject:"topdown processing"" "subject:"top_down processing""
21 |
Lecturers' and students' perceptions of the effectiveness of teaching listening skills to English foreign language students at three Ethiopian universitiesEdaso Mulu Genu 06 1900 (has links)
The main aim of this research was to explore lecturers’ and students’ perceptions of the effectiveness of teaching listening skills to English foreign language (EFL) students at three Ethiopian universities with the purpose of proposing guidelines and recommendations for effective teaching and learning of EFL listening skills. The research was prompted by a number of research projects which indicated that listening skills and the teaching of listening in the Ethiopian context were not effective resulting in students who are ill equipped for listening effectively.
A mixed method approach was followed as a design for the empirical research study. A pragmatic research paradigm, using both quantitative and qualitative methods and then blending the two methods was employed. Quantitative data were collected from 72 lecturers and 158 students at three Ethiopian universities by means of close-ended questionnaires using a five-point Likert scale instrument. For the qualitative phase of the study data were collected by means of semi-structured interviews with lecturers and students. Observations of listening lessons presented in the classroom and in the language laboratory were done by means of completing an observation checklist and note-taking. These were used to triangulate data. The analysis of the data obtained by means of the questionnaires and the observation checklist were done using descriptive and inferential statistics. Qualitative data obtained by means of unstructured interviews (which were transcribed verbatim) were coded and divided into themes.
The research findings indicated that the lecturers’ perceptions of the activities used during the pre-, while- and post-listening phases and the use of listening material were more positive than those of students and that females perceived the effectiveness less positive than males. The data obtained by means of interview questions confirmed what was found in the quantitative part of the study. Observations carried out in the three universities showed that the teaching of listening skills was mostly poorly done and that the listening material used was not suitable and did not interest students. The use of bottom-up and top-down strategies were found to be used inadequately in the teaching of EFL listening skills. The teaching methods and strategies used, as well as activities provided during each listening phase were found to be generally poor. A model for teaching EFL listening in the classroom was proposed in this study.
Lecturers and students expressed their challenges in teaching and learning EFL listening skills and also made recommendations for best practices on how to improve the teaching and learning of EFL listening. These challenges and recommendations for best practices mostly centred around lecturer-related, student-related and institutional-related factors. This study has suggested recommendations pertaining to the lecturers, students, institutions of higher education, the Ethiopian Ministry of Education and schools. / Curriculum and Instructional Studies / D. Ed. (Didactics)
|
22 |
Estratégia atencional para busca visual e reconhecimento invariante de objetos baseada na integração de características bottom-up e top-down / Attentional strategy for visual search and invariant object recognition based on bottom-up and top-down feature integrationEvelina Maria de Almeida Neves 30 June 2000 (has links)
Uma das tarefas básicas dos mecanismos atencionais é decidir qual a localização dentro do campo visual, em que devemos prestar atenção primeiro. Um objeto que contenha características distintas, tais como orientação, forma, cor, tamanho, brilho, textura, etc. diferentes, pode atrair a atenção de uma maneira \"bottom-up\". A informação \"top-down\" baseia-se no conhecimento prévio e tem uma grande influência nas localizações atendidas. Inspirado nos mecanismos da Atenção Visual Humana, embora sem a pretensão de simulá-la, este trabalho prevê o desenvolvimento de uma nova metodologia que integra os dois tipos de informações: \"bottom-up\" e \"top-down\". Características \"bottom-up\" são geradas a partir de Momentos e essas informações são utilizadas em mapas de saliência, enquanto que um conhecimento prévio é utilizado para gerar pistas \"top-down\". Neste trabalho, desenvolveu-se uma metodologia específica para a busca e o reconhecimento visual em cenas com múltiplos objetos, utilizando para isso uma rede \"fuzzy\" contendo três subsistemas \"fuzzy\". Dada uma imagem de entrada, o objetivo consiste em se detectar regiões que possam conter informações mais significativas, a fim de que se possa guiar e restringir processamentos mais complexos. A inclusão de mecanismos de atenção (seleção de uma região de interesse dentro da imagem) é de fundamental importância pois os resultados obtidos pelo método podem ser usados para controlar a aquisição da imagem de uma maneira dinâmica. O modelo proposto está estruturado em três estágios principais: O primeiro estágio consiste em se segmentar os objetos e extrair características globais dos mesmos baseadas principalmente na teoria dos momentos, tais como tamanho, orientação, formato e distância e também média de nível de cinza. Por intermédio da comparação de um objeto com os outros presentes na cena, características \"bottom-up\" de conspicuidade são usadas para guiar a atenção ao objeto mais diferente. Por intermédio do uso da lógica \"fuzzy\" é possível inferir com grande flexibilidade algumas regras de decisão baseadas nos princípios de percepção visual tais como as leis Gestalt. O segundo estágio consiste de um subsistema \"fuzzy top-down\" que combina diferentes características de acordo com a relevância das mesmas em diferentes tarefas. Finalmente, o terceiro estágio consiste de um subsistema \"fuzzy\" que integra as informações obtidas dos subsistemas anteriores e fornece um índice geral de saliência, e indica a provável localização do objeto a ser reconhecido. A nova abordagem foi testada com objetos geométricos levando-se em consideração as características que atraem a atenção dos serem humanos / One of the basic tasks assigned to the human attentional mechanisms is to decide which location in the visual field we must pay attention first. An object containing distinctive features (such as different orientation, shape, color, size, shine, texture, etc.) can attract attention in a bottom-up way. Top-down information is based on the previous knowledge and has a large influence on the attended locations. Inspired on human visual attention mechanisms, although it doesn\'t want simulate it, this work presents a new methodology to integrate two different kind of information: bottom-up and top-down. Bottom-up features are obtained from Moment Theory and this information is used in salience maps, while a previous knowledge is used to create top-down hints. In this work, an specific methodology to visual search and recognition was developed to be applied to scenes containing multiple objects by a fuzzy net with three fuzzy subsystems. The aim of this methodology is to detect regions that may contain the most significant information, in order to guide and to restrict most complex processing. The inclusion of attentional mechanisms (the selection of a region of interest in the image) is fundamental and can be used to control the image acquisition in a dynamic way. The proposed model is structured in three main stages. The first stage segments the objects and extracts global features of them, based on the Moment Theory such as size, orientation, shape and distance and gray level average. By comparing one object with the other ones present in the scene, bottom-up features of conspicuity are used to guide the attention to the most different object. The Fuzzy Logic allows us to infer with great flexibility some of decision rules based on the visual perception principles such as the Gestalt Laws. The second stage is a top-down fuzzy subsystem that combines different features according to the relevance of them in different tasks. Finally, the third stage is a fuzzy subsystem that integrates the information obtained from the previous sub-systems and gives us a general salience index. The new methodology was tested in geometrical objects considering the feature that attracts attention to human beings
|
23 |
Listen Up! : A study of how teachers in SLA approach the listening skill within upper secondary schools in SwedenAndersson, Julia, Lagerström, Elin January 2020 (has links)
Listening comprehension and listening strategies plays a crucial role in the process of acquiring a language. This study aims to investigate to what extent the listening skill is practised in upper secondary schools in the south of Sweden. Research studies within the field of listening are few which indicates that the listening skill is not considered as essential in second language teaching as the other three skills: reading, writing and speaking. Previous studies indicate that teachers should educate students metacognitive awareness when teaching listening. The results summarize the teachers’ answers, reflections and attitudes conducted from semi-structured interviews. The analysis of the results focuses on the four categories distinguished from the teachers’ answers: Teaching Approaches, National Exams, The Individual Student and Metacognitive Awareness. Some of the teachers do not possess the knowledge of how to teach listening that develops students' listening proficiency. As a conclusion, the study shows that a hierarchy exists among the four skills to which teachers adjust to, and this may be detrimental in achieving educational aims.
|
24 |
Předposlechová fáze ve výuce poslechu u dospělého žáka na úrovni A2 - B1. / The Pre-listening Stage in L2 Listening Instruction to A2 - B1 Adult Learners.Ždímalová, Hana January 2014 (has links)
The Pre-listening Stage in L2 Listening Instruction to A2 - B1 Adult Learners By Hana Ždímalová This dissertation deals with listening instruction to adult EFL learners in the Czech Republic and the phenomenon of pre-listening, which is currently under-researched. It examines adult EFL students' perspectives and perceptions of listening instruction and of the inclusion of different pre-listening techniques, particularly at CEFR A2-B1 proficiency levels. The theoretical part of the study focuses on current developments in listening research and the historical context of the development of listening instruction in classical FLT methodology. The pre-listening stage has been integral to L2 listening instruction since the beginning of Communicative Language Teaching. However, some controversial issues have recently been raised. For example, teachers are sometimes suspected of spending too much time on the pre- listening stage (Field 2002; 2008) and the overall usefulness of previewed comprehension questions in testing listening has been challenged (Sherman 1997). Moreover, adult students' listening needs and their perceptions of listening instruction have not yet been thoroughly researched (Graham 2006; Graham and Macaro 2008). This study argues that we should ask the students about their perceptions...
|
Page generated in 0.0598 seconds