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

[Patrizio Tressoldi]

A need your advise about a referee comment: "random-effects
meta-analyses with
inverse-variance weights cannot include studies with sample sizes of two".

Is this statement correct, and if yes, why?

Thanks
Patrizio

--
Patrizio E. Tressoldi Ph.D.
Dipartimento di Psicologia Generale
Università di Padova
via Venezia 8
35131 Padova - ITALY
http://www.patriziotressoldi.it
https://orcid.org/0000-0002-6404-0058

Science of Consciousness Research Group
http://dpg.unipd.it/en/soc

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