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Search results with tag "Control group"
RESEARCH SERIES Observational research methods. Research ...
emj.bmj.comControl group The control group should be easily identifiable. The source of the controls should be explained—are they from the same population as the sample? Are the controls matched or randomised—to minimise bias and confounding. Quality of measurements and outcomes Validity—are the measurements used regarded as valid by other ...
Take Care to Do No Harm: Harmful Interventions …
www.omnibehavioralhealth.comvided a different picture. Compared with participants in the parent condition or control group, participants in the teen program dem-onstrated greater increases in tobacco use and teacher-reported