[R-sig-ME] parameterization for partly nested design with repeated measurements

[Andrew Dolman]

What Dr Bates means is, in case he's not here to answer himself, that

(1|school/class)   always means class nested in school

but it's easy to confuse this notation and by mistake write

(1|class/school)  meaning school nested in class, which does not make sense



andydolman at gmail.com



On 13 November 2010 18:36, Marina SAADIA OTERO <marina.saadia at gmail.com> wrote:
> Dear Mr Bates
> Thanks  very much for all your remarks.
>
>> "1|school/class" is the same as "1|school + 1|class", isn't it?
>>
>> If the classes have unique labels they are.  Technically the expression
>>
>> (1 | school/year) expands to (1|school:class) + (1|school)
>>
>> but if the classes are labeled uniquely then (1|school:class) is the
>> same as (1|class)
>>
>
> Do you mean that the notation (1|school/class) do not always read "class
> nested in school and, both class and school, as random effects" ?
>
> Regards,
> Marina
>
>>
>>
>
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