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179 - 1C - Research Methodology Methodology important for...

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Research Methodology
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Methodology important for generating and testing theories and models , and putting theories into practice. Three types of methodology to discuss: Quantitative Qualitative Action Research
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Action Research Assesses injustices and other short-comings of society and strives to take action against them Kurt Lewin (1947, 1948) Goal is to stimulate real, tangible change No control groups or random samples Action and feedback Example: photo-novellas (Wang, Burris & Xiang, 1996a) Requires collaboration
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Effect size The strength of the association between study variables and outcome Measure of the importance of an effect Measured by an observed difference or correlation Odds ratio (OR) Compares the probability of a certain event in two groups No difference in groups, OR = 1
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Questionnaires A standard set of items with accompanying instructions Must strive to be reliable and valid Single-item measures shown to be very effective Global self-rated health Surveys Sample should represent the study population as closely as possible Stratified sampling
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