Promoting Replicability in Developmental Research Through Meta-analyses: Insights From Language Acquisition Research.

• Autores: Christina Bergmann, Sho Tsuji, Page E. Piccinini, Molly L. Lewis, Mika Braginsky, Michael C. Frank, Alejandrina Cristia
• Localización: Child development, ISSN 0009-3920, Vol. 89, Nº. 6, 2018, págs. 1996-2009
• Idioma: inglés
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• Resumen

  • Previous work suggests that key factors for replicability, a necessary feature for theory building, include statistical power and appropriate research planning. These factors are examined by analyzing a collection of 12 standardized meta-analyses on language development between birth and 5 years. With a median effect size of Cohen's d = .45 and typical sample size of 18 participants, most research is underpowered (range = 6%-99%; median = 44%); and calculating power based on seminal publications is not a suitable strategy. Method choice can be improved, as shown in analyses on exclusion rates and effect size as a function of method. The article ends with a discussion on how to increase replicability in both language acquisition studies specifically and developmental research more generally. [ABSTRACT FROM AUTHOR]