BIOCHEM 301 Lecture 3: research methods 3-29

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Hypothesis: co-incidence of hiv/aids and tuberculosis (tb) impacts the care-seeking behavior of patients as compared to patients with tb who are hiv negative in urban russia. Effect size: proportion of the total variance that is systematic variance; measures the strength of the relationship between 2 variables; It is a proportion, so you can compare effect sizes across variables. D-based: size of the difference between the means of 2 groups, relative to total variability in the data used for tests of difference. R-based: size of the correlation between 2 variables. Or-based: ratio of the odds of an event occurring in 1 group to the event occurring in another group. Interventions usually take place in the real world (community, clinic) and with real people (patients participants) Vary at least one independent variable to assess its effects on the dependent variable. Have the ability to assign participants to the various experimental conditions in a way that assures their initial equivalence.

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