A nurse who is reading a research report has questions about the study's internal validity. Which questions might this nurse be considering? Note: Credit will be given only if all correct choices and no incorrect choices are selected
Select all that apply. 1. Was there bias in the random selection of study subjects?
2. Was the research setting adequately controlled?
3. Do all of the items being measured focus on the same trait?
4. Did the independent variable occur before the dependent variable?
5. Why was the sample size at the end of the study so much smaller than the sample size at the beginning of the study?
1,4,5
Rationale 1: A bias in the random selection of study subjects comprises a selection threat to internal validity.
Rationale 2: A lack of controlled research settings is a threat to external validity.
Rationale 3: Sampling of items that do not focus on the same trait is a measurement error. Measurement errors are a threat to internal consistency.
Rationale 4: Questions about the temporal sequence of independent and dependent variables result in a threat to internal validity.
Rationale 5: Attrition from the original study group can be expected but should be explained. If there is no logical explanation, a threat to internal validity exists.
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Under what circumstances would clients with ST elevation MI require immediate revascularization? Select all that apply
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