mixed method a brief history - fed.cuhk.edu.hk
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Mixed methodsEDM 6402
Qualitative Method in Educational Research
Lai Man Hong
Department of Educational Administration and Policy, CUHK
HTB 302, 26096454
Research questions
• Who should organized and pay for the education and training of working adults?
• Who participate in adult education and training programs, and why do they participate?
• What are the strengths and limitations of different types of education and training that purport to improve worker competencies?
Mixed Method
• Mixed method studies are those that combine the qualitative and quantitative
approaches into the research methodology
of a single study (Tashakkori & Teddlie, 1998)
A brief history
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• Third methodological movement (Tashakkori & Teddlie, 2003)
• adolescence
• The ultimate goal of any research project is to answer the questions that were set
forth at the project’s beginning.
• Because social phenomena are so complex, different kinds of methods are needed to best understand these complexities (greene & Caracelli, 1997)
• Mixed methods are becoming increasingly popular, especially because they are often more efficient in answering research questions than either the qualitative or the quantitative approach alone (Tashakkori & Teddlie, 1998)
• Methods should be mixed in a way that has complementary strengths (Johnson & Turner, 2003)
• Mixed methods provide the opportunity for presenting a greater diversity of divergent views.
• Mixed methods research provides stronger inferences
• A major advantages of mixed methods research is that it enables the researcher to simultaneously answer confirmatory and exploratory questions, and therefore verify and generate theory in the same study.
• Whether mixed methods, as compared to other designs, best addresses the research problem?
• Are both qualitative and quantitative research questions raised?
• Are conclusions drawn from both the qualitative and quantitative data?
Example
• Steven (2002)
• Hypothesis: teachers in schools with distinguished educator (DE) would perform better on measures of teacher effectiveness than would teachers in school without the DE
• How this had occurred?
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Title
• Adolescent development and transition to motherhood: a mixed methods study
Major types of mixed methods
research• Triangulation design
QUAN QUAL
QUAN + QUAL
• Embedded design
qual
QUAN
QUAN (qual)
quan
QUALQUAL (quan)
• Explanatory design
QUAN qual QUAN qual
• Exploratory design
qaul QUAN qual QUAN
Choosing a research design
• Theoretical drive
• Orientation (dominant, less dominant)
• Sequence
• Researchers should carefully select a single design that best matches the research problem. This will make the study more manageable and simpler to implement and describe.
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Choosing a research design
• A primary consideration is that the design should
match the research problem
• Researchers should evaluate their own
expertise
• Consideration must also be given to the
available resources (time, funding)
Choosing a research design
• Timing
– The sequence of data collection
• Weighting
– The relative weight of the quantitative and
qualitative approaches
• Mixing
– The approach to mixing the two datasets
• qual → QUAN
– Sequential exploratory design
• QUAN → qual
• quan → QUAL
– Sequential explanatory design
Sampling
• Probability sample (QUANs) ------Purposive samples (QUALs)
• The sampling strategy should stem logically from the conceptual framework as well as from the research questions being addressed by the study
• The sample should be able to generate a thorough database on the type of phenomena under study
• The sample should at least allow the possibility of drawing clear inferences from the data, the sample should allow for credible explanation
• the sampling plan should be feasible
• 61 firms, 8700 employees
• Stratified random sampling– Manufacturing and service sectors
– Major industries and trades
– Firms with different types of ownership– Firms of different sizes ranging from large to medium to small
– One or two intact work groups or production lines on the floor for a vertical sample consisting of all personnel at a work site
• Purposive sampling:
– Three enterprise with different level of technological change
– Workers with different job training experiences
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• In sequential mixed methods studies,
information from the first sample is often
required so as to draw the second sample.
• A probability sample is drawn first to test
hypotheses based on the extant literature. Then,
a purposive sample is selected to assess
research questions that go beyond what is
known in the current literature.
Making inferences
• Convergence – Life course pattern of males
– Their views, subjective perceptions, personal stock taking over their occupational lives.
– The theoretical statements were first tested deductively through quantitative empirical data.
– A second empirical study using qualitative methods to provided additional evidence for the theoretical hypothesis and to validate the assumption.
Making inferences
• Complementary– The level of school education
– Sociodemographic status of father
– Investment in human capital? / home atmosphere?
– Cultural capital / class exclusion in school?
– It can be meaningfully applied in all cases where one single research method does not suffice to collect adequate and enough empirical data to support the initial theoretical assumption
– In such cases, quantitative and qualitative methods serve different purposes and help to illuminate different aspects of the sociological phenomenon under study.
– Qualitative and quantitative results are not interchangeable.
Making inferences
• Complementary– Many young people were successful in their job
– They were highly criminal during their leisure time
– The empirical data analyzed by statistical means provided only limited evidence
– It served as a starting point for a second empirical inquiry
– It was possible to show that initially assumed relation among employment status, delinquency, and severity of punishment was far more complex than expected – an insight that would not have been acquired using one single method.
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Making inferences
• Divergence– Transition from schooling to work in East Germany– Quan: official allocation authority
– Qual: the role of individual job seeking
– The official allocation authority legitimizing the individual actions of graduates
– In many cases, outcomes of qualitative and quantitative research may at first sight even contradict each other
– The qualitative data thereby revealed that the simple and straightforward picture produced by quantitative data was incorrect and misleading
– “Double-speak”
• Divergence– It may be necessary to revise and modify the
initial theoretical assumptions
– To explain the inconsistent and divergent findings, it is then necessary to seek theoretical concepts and statements that can change the divergence of results to convergence or complementary