[R] te( ) interactions and AIC model selection with GAM

[Bert Gunter]

Well, geez! Without trying to upstage SImon, why not google it yourself?!

http://en.wikipedia.org/wiki/Akaike_information_criterion

(seemed pretty clear to me...)

-- Bert

On Thu, Aug 2, 2012 at 9:54 AM, Will Shadish <wshadish at ucmerced.edu> wrote:
> Simon, could you clarify this paragraph. We are submitting to a psychology
> journal and I am certain they will be asking us about why it is still ok to
> use AIC for non-nested models. Thanks. Will Shadish
>
> On 8/2/2012 9:49 AM, Simon Wood wrote:
>>
>> For AIC model comparison, the usual advice applies that although the
>> comparisons are a bit more reliable for nested models (since then some of
>> the AIC approximations errors are the same in both cases, and cancel in the
>> comparison), it is still ok to use AIC for non-nested models (i.e. it is
>> *not* like most hypothesis testing where everything falls apart if you don't
>> have nesting).
>>
>> best,
>> Simon
>>
>
> --
> William R. Shadish
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-- 

Bert Gunter
Genentech Nonclinical Biostatistics

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