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Title: Weighting strategies in the meta-analysis of single-case studies
Author: Manolov, Rumen
Guilera Ferré, Georgina
Sierra, V.
Keywords: Investigació de cas únic
Single subject research
Issue Date: 2014
Publisher: Springer Verlag
Abstract: Establishing the evidence base of interventions taking place in areas such as psychology and special education is one of the research aims of single-case designs in conjunction with the aim of improving the well-being of participants in the studies. The scientific criteria for solid evidence focus on the internal and external validity of the studies, and for both types of validity, replicating studies and integrating the results of these replications (i.e., meta-analyzing) is crucial. In the present study we deal with one of the aspects of meta-analysis, namely the weighting strategy used when computing an average effect size across studies. Several weighting strategies suggested for single-case designs are discussed and compared in the context of both simulated and real-life data. The results indicated that there are no major differences between the strategies and, thus we consider that it is important to choose weights with a sound statistical and methodological basis, while scientific parsimony is another relevant criterion. More empirical research and conceptual discussion are warranted regarding the optimal weighting strategy in single-case designs, alongside investigation of the optimal effect size measure in these types of design.
Note: Versió postprint del document publicat a:
It is part of: Behavior Research Methods, 2014, vol. 46, num. 4, p. 1152-1166
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ISSN: 1554-351X
Appears in Collections:Articles publicats en revistes (Psicologia Social i Psicologia Quantitativa)

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