Effect sizes for fMRI

Great article by Friston 2012: useful for explain possible bias related to sample size and effect size. pdf

Functional connectivity effect sizes by Dansereau 2017: relates to multi-site investigations; see Fig. 3B and D for Cohen's d ranges. pdf

 Yarkoni 2009: one of a series of articles arguing that correlation studies with small samples tend to over-estimate true effect sizes. pdf