Important Sections of the Methodology Chapter in the Dissertation
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Transcript of Important Sections of the Methodology Chapter in the Dissertation
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Important Sections of the Methodology
Chapter in the Dissertation
Method Kazaura, PhD
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Questions you must ask Steps you will take Elements of each step What is the problem and why should it be studied? What information is available? Why do we want to carry out the research? What do we hope to achieve? What additional data do we need to achieve our objectives? How are we going to collect this information
Selection, analysis and statement of the research problem
Literature review
Formulation of research objectives
Research methodology
- problem identification - prioritizing problem - analysis - justification
- Literature and other available information
- Broad and specific objectives
- hypotheses
- variables - type of study - study pop., sample size - data collection technique - plan for data collection - plan for data processing - plan for data analysis - ethical considerations - pre-test/piloting
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Questions you must ask Steps you will take Elements of each step What data have you collected for each objective? Complete and accurate? What do data look like? How can data be summarized? How can associations between variables determined? Do we measure differences or associations between variables? How should the report be written?
Prepare data for analysis
Summarize data and describe variables
Analyze associations
Determine the types of statistical analysis
Make an inventory of data for each objective. Sort data and check quality
Frequency tables, tally sheets, master sheets
Cross-tabulations
Choosing appropriate significance tests
Write the report Prepare an outline. Prepare and interpret data. Discuss and summarize conclusions. What are recommendations?
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Methodology
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A methodology
• Explaining how you carried out your research
• Where your data come from
• Type of data gathering techniques used, etc
• It is an instruction manual of your plasma TV
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A methodology
• Third party gets enough information to replicate a study
• Do not have to include tools
• Shows why you chose to use those particular techniques
• What new information to collect
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Methodology (points):• Introduction
• Study design
• Study area
• Target population
• Study population
• Sample size
• Sampling procedure
• Study instruments
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Methodology (points): Ctn• Data collection procedure
• Pre-testing of tools
• Recruitment of Ras
• Management of tool in the field
• Data sorting and editing
• Data entry
• Data processing and analysis
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Methodology (points): Ctn• Variables (Dependent and Independent)
• Ethical issues
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Introduction
• Summary of the research questions
• Brief aims and objectives of your study in relation to the
methodology
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Study types
Exploratory orDescriptive study
Cross-sectional comparativeCase-controlCohort
Cohort study
Experimental orQuasi experimental study
Knowing that a problem exist but know little about its characteristics or possible causes
Suspect that certain factors contribute to the problem
Know factors, you want to the extent to which a particular factor causes/ contributes to the problem
Knowing the cause, develop or assess an intervention to prevent or solve the problem
Analytical studies
• Quantitative or qualitative or both approaches
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Study area
• Bring the reader to understand your study area
• Relevant information only
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Target population
• The population into which inference would be
made
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Study population
• The actual sample you will collect data
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Sample size estimation
• Probabilistic or non-probabilistic
• “Convenient”?
• Right formula (necessary to show a formula?)
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Sampling procedure
• Clear, step-by-step
• If more than one population, have separate sub-
section
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Stratified VS Cluster sampling
44
STS: Take a sample in each stratum
CLS: Fully study all units in a selected cluster
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Study instruments
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Data collection tools
• Using secondary data?
• Observational?
• Primary data (Interviewing)?
• Self-admin or face-to-face?
• Focus group discussions or IDI?
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Data collection tools
• Can use a combination of these
• Each has advantages and disadvantages
• Try to minimize BIAS (distortion of the collected data –
away from reality)
• Observer bias, defective instrument, information bias, etc
• Language and procedure to get a final version
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Questionnaires
• Take objective and variables as a starting point
• Formulate a question that captures both
• A question should measure one thing at a time
• No leading questions
• Avoid vague terms (“unhealthy food”)
• Get the proper sequencing (flow) of questions
• Ask sensitive questions in a socially acceptable way
• (“If your friend was considering abortion, what would you advise her”)
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Questionnaires
• Open-ended questions
– What do you think are the reasons for not breast-feeding?
• Semi structured questions
– Example….
• Closed questions
– Example
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Variables
• What new information are we going to collect?
– Background variables (maybe independent variables)
– Dependent variables
– Confounding variables
• Remember, types of variables will dictate the type of
analysis (handling of variables)
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Variables
• How are you going to measure them?
• Operational definition of variables
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Data collection procedure
• So as to help improve the usefulness, timeliness, and
accuracy of data
• These procedures describe processes that will result in
high quality data
• Who to do what
• How
• Imagine you are planning to conduct ‘exit interviews’
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Recruitment of RAs and Pre-testing
• RA: who are they and why?
• Pilot and pre-testing of instruments
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Management of data in the field
• What to do after a completed questionnaire?
• Safe custody
• Data sorting and editing
• Data entry
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Processing and analysis
• Sort data
• Perform quality checks
• Data processing (master sheets or Epi Info)
– Categorizing
– Coding (new variables or for open ended questions)
– Summarizing data into master sheets or data entry
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Data analysis
• Describe variables (frequency tables)
• Based on objectives, cross-tables?
• Select (decide) appropriate tests
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Ethical considerations
• Are data collection techniques likely to
cause physical or emotional harm?
• Obtain informed consent
• Permission to conduct a study