Single-blind randomized trial and a double-blind study
QUESTION
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1.This study was a single-blind randomized trial. How does this differ from a double-blind study? Which kind of bias might it introduce into the study?
2.The sample was recruited from two different physical sites and levels of care. Which kind of bias might this introduce into the study?
3.This criterion is linked to a Learning OutcomeThere were considerable inclusion and exclusion criteria for sample selection. which element of potential bias did each criterion address?
4.This criterion is linked to a Learning OutcomeHow did the protocol protect against researcher bias?
5.How did the researchers isolate the effects of each treatment? Which controls were in place to ensure any differences were attributable to a specific treatment?
6.Which other explanations can you think of for the differences between groups exclusive of the treatment?
7.This criterion is linked to a Learning OutcomeDescribe your level of comfort using these results as evidence for practice. How might these results be applied to nursing practice? 8.What is the external validity – ecological and population – of this study?
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