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12 Cards in this Set
- Front
- Back
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Experimental Studies
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intervention is performed
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Clinical Trials
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human subjects
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Controlled Clinical Trial
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human subject with controls
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Blind Trial
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subject is unaware
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Double Blind Trial
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researcher and subject are unaware
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Advantages and Disadvantages of Double Blind Trial
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Advantages: gold standard in medicine providing the strongest evidence. Provides greatest evidence for causation. Subject to least number of biases
Disadvantages: expensive, time-consuming, and may expose patients to harm |
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Randomized, Controlled trial
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subjects are randomized
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Cross Over Study
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same group of patients is used for experimental and control groups. Experimental and control groups are withdrawn for a wash-out period. Groups then given the alternative treatment
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Randomization
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equally distributes the potential effect of bias between groups; methods of random selection done using a random numer table
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Treatment allocation
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method which determines which treatment a patient will receive (Related to Randomization)
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Non-controlled studies
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effect of intervention or treatment done on a single group. Possible confounding variables such as: placebo effect, hawthorne effect, natural course of disease, regression toward the mean.
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Hawthorne effect
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a term coined in reference to a series of productivity studies at the Hawthorne plant of the Western Electric Company in Chicago. The researchers discovered that their presence affected the behavior of the workers being studies; the term now refers to any impact of research on the subject of study
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