[R-sig-ME] Question about random effects

Thierry Onkelinx thierry.onkelinx at inbo.be
Mon May 23 17:42:24 CEST 2016


If the random effect reflects the design of the study then it should remain
in the model.

ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature and
Forest
team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
Kliniekstraat 25
1070 Anderlecht
Belgium

To call in the statistician after the experiment is done may be no more
than asking him to perform a post-mortem examination: he may be able to say
what the experiment died of. ~ Sir Ronald Aylmer Fisher
The plural of anecdote is not data. ~ Roger Brinner
The combination of some data and an aching desire for an answer does not
ensure that a reasonable answer can be extracted from a given body of data.
~ John Tukey

2016-05-23 17:13 GMT+02:00 Adriana Maldonado Chaparro <
maldonado.aa op gmail.com>:

> Greetings,
>
> I want to ask for advise on the following issue:
> I fitted a mixed model where I'm trying to explain variation in Litter Sex
> Ratio as a function of social network position. In this model the random
> effect, individual identity, explained none of the variance, and one of the
> reviewers argued that I should exclude it from my model because of these
> reason. I think I should keep it because I have repeated measures. What are
> your thoughts on this matter?
>
> Thanks in advance,
>
> Adriana Maldonado
> Postdoctoral Researcher
>
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>
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