[R-meta] Random-effects meta-analyses with inverse-variance weights cannot include studies with sample sizes of two?

Patrizio Tressoldi p@trizio@tre@@oldi @ending from unipd@it
Thu Nov 8 19:01:21 CET 2018

Il 08/11/2018 16:31, Viechtbauer, Wolfgang (SP) ha scritto:
> I wonder what effect size / oucome measure can sensibly be computed based on two subjects. For example, for measures based on two groups (e.g., raw or standardized mean difference, risk difference, log risk/odds ratios), this would imply that there is a single subject in each group.
In this specific case, two single participants contributed to a
percentage of hits, e.g. .30 and .40

I expect that the sample estimation is quite poor, but I don't see any
impediment on obtaining an effect size, or not?


Patrizio E. Tressoldi Ph.D.
Dipartimento di Psicologia Generale
Università di Padova
via Venezia 8
35131 Padova - ITALY

Science of Consciousness Research Group

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