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Showing posts with label Online courses. Show all posts
Showing posts with label Online courses. Show all posts

Wednesday

Những lỗi cơ bản cần tránh khi đặt câu hỏi trong bảng hỏi

1- Tránh đặt câu hỏi đa nghĩa:

Ví dụ:

Bạn đồng ý hay không đồng ý với phát biểu sau đây:

‘Nghiện rượu và cờ bạc là những vấn đề nghiêm trọng ở nông thôn Việt Nam’

Người trả lời có thể đồng ý với ‘nghiện rượu’ nhưng không đồng ý với ‘cờ bạc’

2-Tránh đặt câu hỏi đe dọa thể diện người trả lời:

Ví dụ:

Năm vừa qua có bao nhiêu lần anh say rượu ?

Người trả lời thường không nói thật khi thấy thể diện bị đe dọa

3-Tránh đặt câu hỏi dẫn dắt:

Ví dụ:

“Anh sẽ đóng tiền để ủng hộ những người nghèo bị ung thu chứ?”

Câu hỏi dạng này ngầm định hướng câu trả lời cho người trả lời.

4-Tránh đặt câu hỏi có từ vựng gây khó hiểu

Ví dụ:

“Trong 12 tháng qua, sinh kế chính của anh là gì?”

Nhà nghiên cứu thường hiểu sinh kế có năm thành phần (vốn xã hội, tài sản, tài chính, con người, tự nhiên). Người được hỏi có thể cho rằng sinh kế là ‘cách kiếm tiền’.

5-Tránh đặt các câu hỏi có cấu tạo giống nhau ở gần nhau để tránh kiểu trả lời hàng loạt mà không để ý nội dung

Ví dụ:

Có 10 câu hỏi dùng để đo thái độ đối với nạo phá thai. Các câu này cùng có dạng Likert (5 mục, từ Rất không đồng ý đến Rất đồng ý). Người trả lời dễ cho rằng chúng đều thể hiện một chiều đo cho nên sẽ dễ dàng chọn một loạt phương án ‘Rất không đồng ý’ khi muốn thể hiện thái độ phản đối nạo phá thai của mình. Họ làm thế mà không cần nhìn qua nội dung các câu hỏi. Điều này khiến cho các câu trả lời giống nhau tăm tắp, nhưng không thực sự phản ánh các mức độ khác nhau của sự không đồng ý ở mỗi người.

 

Kết luận

Để tránh được những vấn đề trên, cần phải thử nghiệm bảng hỏi kỹ càng trước khi thực hiện thu thập thông tin. Cần hỏi thử khoảng 20 người và yêu cầu họ đánh giá bằng cách cho điểm từng câu hỏi về độ dễ hiểu của câu hỏi, khả năng đe dọa thể diện của câu hỏi, vv. Có thể tránh các câu trả lời ‘đều tăm tắp’ bằng cách làm cho định dạng của một vài câu hỏi khác đi so với các câu còn lại (cùng đo một khái niệm hay thái độ), hoặc phân tán chúng ở những nơi khác nhau trong bảng hỏi.

Friday

Self training multi- modelling & Package to deal with Missing Data :)

Go to this site and register a FREE course on multi-modelling ! All materials are downloadable. See guides to get MLwin for members of UK universities. Go through modules 1-3 to get basics of statistics. Look at the full list of books for multi-modelling.

Note that multi modelling can be done with many packages, including Stata!

http://www.bristol.ac.uk/cmm/learning/course.html#pay
http://www.bristol.ac.uk/cmm/software/mlwin/ordering/ac-uk.html

In order to deal with missing data (2 -level missing data), go to this website, the package is freely available:

http://www.bristol.ac.uk/cmm/software/realcom/imputation.html

Wednesday

John Hopkins coursewares

All OCW Courses
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Adolescent Health and Development

Uses lectures, readings, discussion and panels of guest speakers to explore a variety of aspects of adolescence and adolescent health.

Bioinformatics and Computational Biology Solutions Using R and Bioconductor

Covers the basics of R software and the key capabilities of the Bioconductor project, including importation and preprocessing of high-throughput data from microarrays and other platforms.

Biological Agents of Water and Foodborne Bioterrorism

Examines the various biological agents that terrorists could use against food or water supplies.

Biostatistics Lecture Series

Addresses topics that commonly arise from the day-to-day collaboration between researchers in public health and Biostatistics at the School.

Case Studies in Terrorism Response

Presents three illustrative case studies to reinforce basic concepts and principles of terrorism preparedness and response, as well as to identify some specific practical considerations.

Concepts in Economic Evaluation

Describes how economic theory is linked to economic evaluation techniques like cost-benefit and cost-effectiveness analysis and to introduce students to many concepts that are specific to economic evaluation.

Confronting the Burden of Injuries

Guides students interested in working on injury control in areas with little or no tradition in injury prevention from a public health perspective.

Critical Analysis of Popular Diets and Dietary Supplements

Provides the knowledge one needs to critically appraise a weight control diet or dietary supplement and choose the best plan for success.

Dissertation Workshop

The workshop is intended for Doctoral students in the health and social sciences who are at the stage of developing a research proposal.

Environmental Health

Examines health issues, scientific understanding of causes and possible future approaches to control the major environmental health problems in industrialized and developing countries.

Epidemiology of Infectious Diseases

Introduces the basic methods for infectious disease epidemiology and case studies of important disease syndromes and entities.

Essentials of Probability and Statistical Inference IV

Introduces the theory and application of modern, computationally-based methods for exploring and drawing inferences from data.

Ethical Issues in Public Health

Focuses on ethical theory and current ethical issues in public health and health policy, including resource allocation, the use of summary measures of health, the right to health care and conflicts between autonomy and health promotion efforts.

Ethics of Human Subject Research

Introduces students to the ethics of human subject research, including ethical theory and principles are introduced and followed by a brief history of research ethics.

Family Planning Policies and Programs

Introduces issues and programmatic strategies related to the development, organization and management of family planning programs, especially those in developing countries.

Food and Nutrition Policy

Familiarizes and engages the student with the process of developing policies.

Fundamentals of Program Evaluation

Fundamentals of Program Evaluation familiarizes students in different types of program evaluation, including needs assessment, formative research, process evaluation, monitoring of outputs and outcomes, impact assessment, and cost analysis.

Global Tobacco Control

Presents the health and economic burden of tobacco use worldwide and highlights practical approaches to tobacco prevention, control, surveillance and evaluation.

Health Across the Life Span: Frameworks, Contexts, and Measurements

Introduces and examines the basic prinicples which guide growth and development and the health of individuals across the lifespan, from the prenatal period through senescence.

Health Issues for Aging Populations

Introduces the study of aging, its implications for individuals, families, and society, and the background for health policy related to older persons.

History of Public Health

Examines the historical experience of health and illness from a population perspective.

Impact of Pandemic Influenza on Public Health

Examines the path of the avian influenza and examines how it could impact world health.

Improving Understanding and Collaboration Among First Responders

This unique training addresses the institutional culture of five responder groups: law enforcement, EMS, fire, public health, and private security in an attempt at fostering understanding among these groups.

International Nutrition

Presents major nutritional problems that influence the health, survival and developmental capacity of populations in developing societies.

Introduction to Mental Health and Disaster Preparedness

Introduces the topics of disaster mental health services, mental health surge capacity, and psychiatric first aid.

Introduction to Methods for Health Service Research and Evaluation

Introduction to Methods for Health Services Research and Evaluation provides an introduction to basic methods for undertaking research and program evaluation within health services organizations and systems.

Malariology

Presents issues related to malaria as a major public health problem.

Managed Care and Health Insurance

Presents an overview of major issues related to the design, function, management, regulation, and evaluation of health insurance and managed care plans.

Managing Long-Term Care Services for Aging Populations

This course will consider long-term service delivery programs designed to meet the special needs of seniors.

Methods in Biostatistics I

Presents fundamental concepts in applied probability, exploratory data analysis, and statistical inference, focusing on probability and analysis of one and two samples.

Methods in Biostatistics II — New this month

Presents fundamental concepts in applied probability, exploratory data analysis, and statistical inference, focusing on probability and analysis of one and two samples.

Nutritional Health, Food Production and the Environment

Provides an understanding of the complex and challenging public health issue of food security and in a world where one billion people are under-nourished while another billion are overweight.

Personal Preparedness Planning For Public Health Workers

Public health workers need to understand and implement basic concepts of personal preparedness planning so that they can function effectively as public health emergency responders in a post-9/11 world.

Pharmaceuticals Management for Underserved Populations

Students will be guided to analyze problems and develop strategies based on real world drug management issues including regulations, manufacture, procurement, distribution, safety, policy, financing and the unique aspects of international pharmaceutical trade, the role of the World Trade Organization - Trade-Related Aspects of Intellectual Property Rights (WTO-TRIPS), government, non-governmental organizations (NGOs) and individuals/programs in the selection and use of pharmaceutical products.

Population Change and Public Health

This course introduces the basic elements of population studies, including: population size, composition, and distribution, and the causes and consequences of changes in these characteristics.

Preventing Infant Mortality and Promoting the Health of Women, Infants, and Children

This course focuses on the historical problems and interventions associated with infant mortality.

Principles of Drug Development

Presents principles underlying preclinical and clinical development of new therapeutic drugs and procedures.

Principles of Human Nutrition

Provides an integrated overview of the physiological requirements and functions of protein, energy and the major vitamins and minerals that are determinants of health and diseases in human populations.

Principles of Industrial Hygiene

Principles of Industrial Hygiene provides an introduction to the field of industrial hygiene and to occupational health in general.

Problem Solving for Immunization Programs

This material will cover immunization basics and survey the public health, sociological, and economic literature, identifying and analyzing common problems using a standard problem-solving approach.

Problems in the Design of Epidemiologic Studies (Grant Writing)

Students participate in the preparation of a research protocol for a study in a human population.

Psychiatric Epidemiology

Psychiatric Epidemiology reviews descriptive and analytic epidemiology for major mental disorders of childhood, adulthood, and late adult life.

Public Health Biology

Offers an integrative molecular and biological perspective on public health problems. Explores population biology and ecological principles underlying public health and reviews molecular biology in relation to public health biology.

Radiation Terror 101

Introduces you to general radiation principles, radiation safety and protection, and the basic types of radiological terror, and also provides practical guidance on acute response techniques and general countermeasures.

Refugee Health Care

Refugee Health Care addresses the provision of basic health requirements for refugees and the coordination of care among the agencies concerned with them.

Reproductive and Perinatal Epidemiology

This course focuses on current research, controversial issues, and methodological problems in the epidemiology of reproductive and perinatal health.

Social and Behavioral Aspects of Public Health

The course is designed to help students develop basic literacy regarding social concepts and processes that influence health status and public health interventions.

Social and Behavioral Foundations of Primary Health Care

Aims at providing you with the knowledge and skills needed to diagnose (understand) community, individual, and organizational behaviors and change processes in developing countries and in cross-cultural settings as a foundation for planning culturally appropriate primary health care (PHC) in the context of the ecological model of health behavior.

Statistical Reasoning I

Statistical Reasoning in Public Health provides an introduction to selected important topics in biostatistical concepts and reasoning through lectures, exercises, and bulletin board discussions.

Statistical Reasoning II

Statistical Reasoning in Public Health II provides an introduction to selected important topics in biostatistical concepts and reasoning through lectures, exercises, and bulletin board discussions.

Statistics for Laboratory Scientists I

This course introduces the basic concepts and methods of statistics with applications in the experimental biological sciences.

Statistics for Laboratory Scientists II

This course introduces the basic concepts and methods of statistics with applications in the experimental biological sciences.

Statistics in Psychosocial Research: Measurement

Presents quantitative approaches to measurement in the psychological and social sciences.

STI Prevention: Using Epidemiology to Inform Policy and Program

Considers features of sexually transmitted diseases relevant to their control, reviewing the natural history of the infections and laboratory diagnoses.

Training Methods and Continuing Education for Health Workers

This course in Training Methods and Continuing Education for Health Workers identifies the role of training and continuing education as an important component of health service and personnel management.

Tropical Environmental Health

During this class we will be discussing some of the problems arising from poor facilities in many developing countries.

Understanding Cost-Effectiveness Analysis in Health Care

The primary objective of this content is to prepare students to read and interpret cost-effectiveness studies.

Water Sanitation Needs in Complex Humanitarian Emergencies

Presents a historical overview of the influence of water and sanitation on human health; types of water and sanitation facilities and equipment presently available and particularly suited to refugee populations displaced by war, famine, drought, and economic turmoil; and methodologies for assessing and quantifying water and sanitation needs :)

Mitt Openware

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