title: Replication is about effect size: Comment on Maxwell, Lau, and Howard (2015).
abstract: The view that a single study can be trusted is an attractive but false promise provided by null hypothesis testing. The replication question should be to what extent investigators can reproduce effect sizes and how narrow their 95% confidence interval can become. Cumulative meta-analyses will enable us to determine how replicable psychological effects are and what their effect size is.
authors.affiliation: Fordham University.
authors.forename: Warren W
authors.initials: WW
authors.lastname: Tryon
mesh_terms: D006801:Humans; D012107:Research Design