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Change the setting of the studyControl the study findingsDistort the study findingsReduce chance of errorCorrect!Bias distorts the findings from the real and the true. Changing the setting, controlling the study findings, and reducing the chance of error can affect the generalizability of the research results.
NURS4110 sp2019oWhat is control?Implemented throughout the designImproved accuracy of findingsIncreased control in quasi-experimental researchGreatest in experimental researchThe nurse researcher is explaining the purpose of control in a study design. This would include which of the following?Establish the credibility of the researcher.Highlight design flaws.Increase the probability that the results are true to reality.Interfere with the validity of the findings.Correct!As control increases, the likelihood that the study findings are an accurate reflection of reality increases.oWhat is manipulation?A form of controlImplementation of a treatment or interventionThe independent variable is controlled.Must be careful to avoid introduction of bias into the studyUsually done only in quasi-experimental and experimental designsInternal and external validityInternal “occurring inside the study”External “occurring on the outside”Was the research done right?Does it avoid confounding? (more than one possible independent variable acting at the same time).Less chance for confounding, higher internal validity.High validity allows you to choose one explanation over another. How well data & theories from one setting apply to anotherGeneralizability Cannot make inferences without external validity! Why? It can’tbe applied to the bigger picture without external.Threats to internal validity:History-when an event occurs at same time of treatment and Threats to external validity:Interactionbw how the subjects were selected & treatment
NURS4110 sp2019changes participants behaviorMaturation- participants change over timeTesting- participants performance after multiple tests is different than the initial testingInstrumentation- changing measurement methods during the studyMortality- attrition, withdrawals, dropouts throughout that may lead to unequal groups at the end of the studySelection interactions- the selection method may interact with one or more of the others causing biasPretestingmay cause them to act differently than normalExperimental setting- may react differently based off of where they areMultiple treatments/interventions- may lead to limited generalizability bc early treatments may do the trickThe research study has a threat to internal validity when which of the following occurs?A valid rival hypothesis exists.Findings are generalized beyond the target population.The results of statistical analysis are incorrectly interpreted.There is a mismatch between the conceptual and operational definitions.