Statistics Commentary Series. Commentary No. 44: Internal and External Validity.
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DOI: 10.1097/jcp.0000000000001304
Abstract: I n a previous commentary, 1 we discussed the difference between efficacy trials, which ask whether an intervention can work under ideal circumstances, and effectiveness trials, which seek to determine whether an intervention doeswork in… read more here.
Keywords: statistics commentary; commentary series; internal external; external validity ... See more keywords