[R-sig-ME] sample size in glmer model

[Souheyla GHEBGHOUB]

Hi,
In Field (2012) we need 10-15 *participants* per variable for regression,
in Levshina (2015) we need 10-15 *observations* per variable.

Is it participant or observation? I am so confused as I have 53
participants and 1484 observations.

Thank you,
Sou
PhD in Education
University of York

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