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Avoiding ecological fallacy: assessing school and teacher effectiveness using HLM and TIMSS data from British Columbia and OntarioWei, Yichun 18 October 2012 (has links)
There are two serious methodological problems in the research literature on school effectiveness, the ecological problem in the analysis of aggregate data and the problem of not controlling for important confounding variables. This dissertation corrects these errors by using multilevel modeling procedures, specifically Hierarchical Linear Modeling (HLM), and the Canadian Trends in International Mathematics and Science Study (TIMSS) 2007 data, to evaluate the effect of school variables on the students’ academic achievement when a number of theoretically-relevant student variables have been controlled. In this study, I demonstrate that an aggregate analysis gives the most biased results of the schools’ impact on the students’ academic achievement. I also show that a disaggretate analysis gives better results, but HLM gives the most accurate estimates using this nested data set.
Using HLM, I show that the physical resources of schools, which have been evaluated by school principals and classroom teachers, actually have no positive impact on the students’ academic achievement. The results imply that the physical resources are important, but an excessive improvement in the physical conditions of schools is unlikely to improve the students’ achievement. Most of the findings in this study are consistent with the best research literature. I conclude the dissertation by suggesting that aggregate analysis should not be used to infer relationships for individual students. Rather, multilevel analysis should be used whenever possible.
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Avoiding ecological fallacy: assessing school and teacher effectiveness using HLM and TIMSS data from British Columbia and OntarioWei, Yichun 18 October 2012 (has links)
There are two serious methodological problems in the research literature on school effectiveness, the ecological problem in the analysis of aggregate data and the problem of not controlling for important confounding variables. This dissertation corrects these errors by using multilevel modeling procedures, specifically Hierarchical Linear Modeling (HLM), and the Canadian Trends in International Mathematics and Science Study (TIMSS) 2007 data, to evaluate the effect of school variables on the students’ academic achievement when a number of theoretically-relevant student variables have been controlled. In this study, I demonstrate that an aggregate analysis gives the most biased results of the schools’ impact on the students’ academic achievement. I also show that a disaggretate analysis gives better results, but HLM gives the most accurate estimates using this nested data set.
Using HLM, I show that the physical resources of schools, which have been evaluated by school principals and classroom teachers, actually have no positive impact on the students’ academic achievement. The results imply that the physical resources are important, but an excessive improvement in the physical conditions of schools is unlikely to improve the students’ achievement. Most of the findings in this study are consistent with the best research literature. I conclude the dissertation by suggesting that aggregate analysis should not be used to infer relationships for individual students. Rather, multilevel analysis should be used whenever possible.
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The interactive contribution of resources with regard to the operation and outputs of a clothing production systemPrinsloo, Caroline 21 November 2011 (has links)
The clothing and textile industry has a significant impact on the world economy and has secured itself as one of the six most important industries in South Africa. This industry faces many challenges and over the years has been branded by economical changes, company closure, extensive job losses, low productivity, lack of investment in machinery, intensive competition from low-priced imports, trends toward outsourcing and growth in the informal sector (Pride&Ferrell, 1993:34). All of these factors had a direct impact on the South African clothing industry’s overall output. This study’s focus is primarily on the South African clothing production industry that has, despite its prominence in the country’s economy, shown considerable decline in the last decade. For South African clothing production to survive, it is important to connect to global value chains and to increase exports. To do this, clothing manufacturers and operational managers have to improve operational productivity and overall plant performance. Although companies are unable to control external and environmental factors, they can adjust internal factors within the company. Therefore this study explores the utilisation of a company’s resources in relation to their productivity. In this study the aim was to explore and describe the interactive contribution of resources (human, operational and physical) with regard to the operation and outputs of a South African clothing production system from a management’s and employees’ perspectives to formulate recommendations whereby the clothing industry could become more competitive in the current cut-throat environment. A clothing production company can be viewed as a social system with constant interaction with the environment. It does not operate in a vacuum and consists of a collection of interrelated parts of various subsystems (Spears&Gregoire 2004:24). The systems theory was adapted as a theoretical framework for this study, as it provides a basis for understanding how the various interactive resources are interrelated to the clothing production system and contribute to the overall outputs thereof (Spears&Gregoire, 2004:24). A case study research design was followed, which permitted a more flexible and multi-perspective approach to understand the phenomena under study (Maree, 2007:5). A combination of qualitative and quantitative data collection techniques was used with relevant data analysis procedures. The unit of analysis was a clothing production company in the Bronkhorstspruit area in Gauteng. The operational management, line supervisors as well sewing machine and cutting room operators participated in the study. Purposive sampling was used to select the case, and the individuals within the case study (Babbie&Mouton, 2003:166). Individual interviews were held with the operational management. From the focus group interviews, with the line supervisors, a questionnaire was developed. The sewing machine and cutting room operators participated in the completion of the questionnaire. Qualitative data analysis was done on the interviews and focus group interviews according to Miles and Huberman’s (1994:10) data analysis process. Overall 137 questionnaires were completed and was thereafter analysed by a statistician. Findings indicated that the internal resources in this factory were interrelated. Thus the optimisation of each resource individually contributed to a more efficient overall production output. Human resources were the core and heartbeat of any production company. Employees’ needed, employees’ satisfaction, training, and communication and feedback were crucial for optimal outputs. Resources that had a direct relation to human resources were performance appraisal, motivation, training and ergonomics. Optimum training was facilitated by motivating workers. Performance appraisal was directly influenced by training as management trained employees through a performance appraisal system. When the trained employees knew how to operate their equipment effectively it contributed to ergonomic posture and the optimum usage of equipment. Thus all four of these resources were closely interrelated on all levels. Operational and physical resources (technology, production planning, material handling and production system used) were all related to ergonomics and indirectly related to the other human resources mentioned. Quality control was incorporated into all the resources within the company and played a role within the use of every one of the above-mentioned resources. Human resources implemented quality control in their work on hand, which was facilitated by technology, production planning, material handling and the production system used. An investigation of a single resource would therefore not have reflected a true scenario in terms of strengths and shortcomings that could be attended to, to improve the outputs of a clothing production system. This study revealed the pertinence of all of the resources in terms of the success of a clothing production system but clearly indicated that failure to control one resource could jeopardise the entire system unless other resources are able to compensate for such shortcomings. In this particular study the potential role of human resources in terms of the success of a clothing production system was confirmed. Although not conducive in the long term, when properly trained and well-treated, employees could be motivated to overcome frustrations caused by poor working conditions created by poor ergonomic features and dated machinery. The hierarchy of resources and the interactive contribution of resources towards the output of the system should therefore be understood and acknowledged by management in order to succeed and to survive in a cut throat industry. / Dissertation (MConsumer Science)--University of Pretoria, 2011. / Consumer Science / unrestricted
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Variables impacting on the delivery of Music in the learning area Arts and Culture in South AfricaKlopper, Christopher John 22 August 2005 (has links)
This thesis is the documentation of an empirical study using quantitative methods to identify variables that are impacting on the delivery of Music in the learning area Arts and Culture in South Africa. These variables were extrapolated from surveys, interviews and questionnaires. The learning area Arts and Culture is one of the eight compulsory learning areas for all learners from Grades 4-9 in South Africa. One of the four strands is Music. The research question was formulated on the basis that a perceived problem existed in the delivery of Music in the learning area Arts and Culture. This supposition is supported by the literature review. The employment of univariate descriptive statistics, cross-tabulations of two-variable relationships and chi-squared tests to draw inferences about the relationship between categorical variables were adopted to quantify which variables are impacting on the delivery of Music in the learning area Arts and Culture. Four dominant approaches to Music were defined as key issues: -- Governmental policies on educational reform -- Learning area Arts and Culture -- International viewpoints -- An African perspective on Music The findings on these dominant approaches to Music revealed that the government policy of decentralisation was employed as a mechanism to address the disparities in education. The curriculum implemented, Curriculum 2005, was also employed as a structure to redress the dispersed education system that existed prior to the democratic participation of South African citizens. A comparative analysis of international countries reviewed depicts arts education as an encompassing field with discrete arts disciplines. South Africa, conversely, adopts an integrated approach to the arts in the learning area Arts and Culture. This aligns to an African perspective of Music, having no subject boundaries and with the performing arts disciplines seldom separated in creative thinking. The findings in these dominant approaches to Music led to the further delineation of the research question into three main avenues of inputs: -- human resources -- physical resources -- the societal role of the arts The analysis of the data obtained from the educators indicated that all educators possess a qualification of some kind, but that there is a lack of specialisation in Music. Those who have an arts qualification alluded to the fact that they have a natural bias towards the art form in which they received their training. Statistical analysis proved that the type of school influences the level of implementation, the budget and the accessibility of resources for Music. The research indicates that the response of the learners to the learning area Arts and Culture in South Africa is associated with the grade of the learner, the race of the learner and whether the learner acknowledges the value of learning about Music or not. Although school principals view the learning area as an integral part of education, they raised justified concerns pertaining to the learning area. On the basis of the identification and quantification of variables impacting on the delivery of Music in the learning area Arts and Culture in South Africa, recommendations are made. / Thesis (DMus)--University of Pretoria, 2006. / Music / unrestricted
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Hur uttrycker jag det här? : En självstudie om kroppsliga uttryck vid sceniska framträdanden. / How do I express this? : A self-study of bodily expression in singing performancesPersson, Oskar January 2016 (has links)
Syftet med arbetet är att undersöka en sångares kroppsliga gestaltning av ett musikstycke vid musikaliskt framträdande. Detta har undersökts genom videofilmning av framträdanden, och analyser av dessa med fokus på kroppsliga uttryck. Till detta har loggbok förts över tankar och händelser från framträdandena. I analysen av framträdandena har som teoretiskt perspektiv ett multimodalt designteoretiskt perspektiv använts. I resultatet presenteras hur olika resurser används, hur dessa resurser samspelar och hur de påverkar varandra. Det framkommer att den kroppsliga gestiken har två huvuduppgifter vid framträdanden, dels att vara stödjande för sångtekniken samt uttrycka och gestalta ett budskap. Det framkommer också att inre visuella bilder används, dels för att gestalta och förmedla ett budskap. I diskussionen diskuteras olika förutsättningar för framträdanden utifrån det designteoretiska perspektivet och den tidigare forskning som tagits upp i bakgrundskapitlet. / The purpose of this study is to examine the singer’s physical disposition when performing a piece of music. This has been investigated by video documented performances and analysis with a focus on bodily expressions. To transfer the thoughts and events from the different performances, I have used a logbook. The multi-modal design theory perspective has been used as a theoretical perspective in the analysis of the performances. The result shows how the various resources are used and how these resources interact and how they affect each other. The bodily gestures have two main tasks during the performances: to be supportive of vocal technique and to express and portray a message. Results emerge indicating that the internal visual images are used to partly portray and convey a message. In the discussion chapter different aspects for the performance are discussed based on the design theoretical perspective and the previous research raised in the background chapter.
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School climate of adult basic education centresNkosi, Monde Eustice Gideon 12 September 2008 (has links)
This study explored the school climate of adult basic education centres by investigating the extent to which these education centres showed evidence of control, staff cohesiveness, physical resources, and safe and orderly environment. The study was inspired by a lack of school climate studies that focused on adult basic education centres as many school climate studies had concentrated on investigating the school climate of primary and secondary schools. The broad research question which was addressed in the research study was: ‘What is the nature of the school climate of adult basic education centres as perceived by educators?’ The participating educators were randomly selected and a survey – in the form of a questionnaire – was administered. The questionnaire comprised the four scales mentioned above. The items from the four scales were validated through the use of both face and content-related validity procedures. Face validity was ensured through pre-testing. Content validity was achieved through expert review of the items used. The extent to which these items could be included as part of a scale was further explored by means of reliability analysis whose acceptable coefficient alpha was benchmarked at 0.65 and above. Reliability was used to explore the reliability of the questionnaire. The aspect of reliability used for this purpose was analysis of internal consistency. The main purpose was to ascertain whether all the items used in the four scales collectively measured the construct school climate. For example, the reliability analysis for the variable control had 0.79 as its coefficient alpha whilst the reliability analysis for the variable staff cohesiveness, physical resources and safe and orderly environment had 0.76, 0.89, 0.84 as corresponding coefficient alpha respectively. This implied that most items within the four scales measured the construct control, staff cohesiveness, physical resources, safe and orderly environment as part of the construct school climate. Furthermore, the coefficient alphas of these four scales compared well with the overall coefficient alpha of 0.84 for this study, which further implied that each of the scales had an immense contribution in the measurement of the construct school climate. Based on the scale rubric designed for the variable control (high score 28-21: moderate score 20-14; low score 13-0), the results from the analysis indicated that the centres under review had a fair level of control mechanisms in place as in all these centres the mean score varied between 23 and 25. On the basis of the scale rubric devised for staff cohesiveness (high score 32-24; moderate score 23-16; low score 15-0), it was also revealed that the majority of the centres had evidence of staff cohesiveness, as no low score was recorded for in most cases the mean score revolved between 22 and 25. Although, the results further indicated that there was an average degree of physical resources in most centres, it also became clear that not all centres had the same level of physical resources at their disposal as the majority of the centres had a mean score that fluctuated between 18 and 33. The scale rubric for physical resources was: between 40-30 for high score; between 29-20 for moderate score and between 19-0 for low score. Finally, the mean score for the variable safe and orderly environment alternated between the minimum mean score of 17 and the maximum mean score of 21. Based on the latter mean scores, it became clear that the majority of the centres had a safe and orderly environment level that fell within the moderate score category (between 20-14) whilst the remaining two centres had a high score category (between 28-21) and no centre had a low score category (between 13-0). / Dissertation (MEd)--University of Pretoria, 2008. / Curriculum Studies / unrestricted
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Strategies to enhance accessibility to health care in rural areas of ZimbabweMangundu, Manenji 12 1900 (has links)
Background: Accessibility to health care in rural areas is globally impeded by physical, material, human, financial and managerial resources and societal barriers in the health care system. The Systems Model formed the backbone to developing a strategic action plan to address the challenges experienced by all stakeholders involved.
Purpose: The purpose of this study was to describe accessibility to health care in rural areas to develop a strategic action plan to enhance accessibility to health care in these areas of Zimbabwe.
Methods: A multiple methods approach combining qualitative and quantitative components during 4 phases. Phase 1 collected quantitative data with questionnaires from professional nurses and health care users who were conveniently sampled. Phase 2 collected qualitative data with a nominal group from national health directors who were conveniently sampled. Phase 3 was based on the findings from Phases 1 and 2 with a literature control to develop a draft strategic action plan. During phase 4 the strategic plan was amended and validated with a validation tool by members of the parliamentary portfolio committee on health in Zimbabwe with all-inclusive sampling. Framework: The Systems Model Framework was adopted for this study as outcomes and impact on people’s health is determined by inputs, processes and outputs. This model was relevant and applicable to accessibility to health care.
Research findings: Accessibility to health care in rural areas of Zimbabwe is affected by inadequate distribution of physical resources, shortage of material and human resources, and a lack of financial resources. The strategies identified contributed to the strategic action plan which was amended and validated. The strategic action plan includes improving the health infrastructure, providing appropriate medical drugs, training and retention of health workers, providing medical equipment at the rural health facilities, reviewing the health worker workload and addressing staff shortages, providing free health care services in rural areas, and improving the capacity of the health care system.
Conclusion: The strategic action plan was developed based on the inputs of the relevant stakeholders and the System Model. The inclusion of the parliamentary portfolio committee on health (members of parliament of Zimbabwe) might enhance the possibility for implementation which can enhance the accessibility to health care in rural areas of Zimbabwe. / Health Studies / D. Litt. et. Phil. (Health Studies)
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Imbalances and inequities in South African education : a historica-educational survey and appraisalNaicker, Inbanathan 06 1900 (has links)
This study, in the main, focuses on the racial imbalances and
inequities that characterised South African education between
1965 and 1992. A historical background of the South African
educational system as well as an account on the apartheid
ideology and its impact on education is presented. For the
four principle racial groups in South Africa, namely, the
Africans, Indians, Whites and Coloureds, a historicaleducational
survey of the imbalances and inequities prevalent
in pre-primary, school-based and post-secondary education in
respect of access to education, financing of education, and
human and physical resources is given. As a way forward, some
recommendations for the redressing of the imbalances and
inequities identified in this study are presented. / Educational Studies / M. Ed. (History of Education)
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Imbalances and inequities in South African education : a historica-educational survey and appraisalNaicker, Inbanathan 06 1900 (has links)
This study, in the main, focuses on the racial imbalances and
inequities that characterised South African education between
1965 and 1992. A historical background of the South African
educational system as well as an account on the apartheid
ideology and its impact on education is presented. For the
four principle racial groups in South Africa, namely, the
Africans, Indians, Whites and Coloureds, a historicaleducational
survey of the imbalances and inequities prevalent
in pre-primary, school-based and post-secondary education in
respect of access to education, financing of education, and
human and physical resources is given. As a way forward, some
recommendations for the redressing of the imbalances and
inequities identified in this study are presented. / Educational Studies / M. Ed. (History of Education)
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