Browsing by Author "Levin, Joel R."
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Item Correcting "Planning an experiment in the company of measurement error"(1978) Levin, Joel R.; Subkoviak, Michael J.Comments on our earlier article are acknowledged and appreciated. In addition, potentially misleading notions arising from these comments are addressed and clarified.Item Planning an experiment in the company of measurement error(1977) Levin, Joel R.; Subkoviak, Michael J."Textbook" calculations of statistical power and/or sample size follow from formulas that assume that the variables under consideration are measured without error. However, in the "real world" of behavioral research, errors of measurement cannot be neglected. A recent sample-size determination approach is easily adapted to incorporate unreliability information for both completely randomized and randomized block analysis-of-variance designs. A worked example presents an instance wherein a blocking strategy is clearly advantageous assuming infallible measuring instruments, but not when the same instruments are granted fallibility.