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Extensions of Permutation Solutions to Test for Treatment Effects in Replicated Single-Case Alternation Experiments with Multivariate Response
Authors:Francesca Solmi  Patrick Onghena  Luigi Salmaso  Isis Bulté
Institution:1. Department of Statistics , University of Padova , Padova , Italy;2. Faculty of Psychology and Educational Sciences , Katholieke Universiteit of Leuven , Leuven , Belgium;3. Department of Management and Engineering , University of Padova , Padova , Italy
Abstract:Single-case experiments are frequently used to do research involving a clinical intervention, since large-n trials are often impractical in clinical research. In order to investigate a possible difference in the effect of the treatments considered in the study, nonparametric instruments are valid tools; in particular, permutation solutions work well when we wish to assess differences in treatment effects. We present an extension of a permutation solution to the multivariate response case and to the case of replicated single-case experiments. A simulation study shows that the approach is both reliable under the null hypothesis and powerful under the alternative. At the end, we present the results of an application to two real experiments.
Keywords:Nonparametric combination  Permutation test  Power comparison  Single-case experiment  Time-process
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