期刊
CHILD DEVELOPMENT
卷 89, 期 6, 页码 1996-2009出版社
WILEY
DOI: 10.1111/cdev.13079
关键词
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资金
- Berkeley Initiative for Transparency in the Social Sciences
- Laura and John Arnold Foundation
- H2020 European Research Council [660911, 659553]
- Agence Nationale de la Recherche [ANR-14-CE30-0003 MechELex, ANR-10-IDEX-0001-02 PSL*, ANR-10-LABX-0087 IEC]
- Fondation de France
- Center for Effective Global Action (CEGA)
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.
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