Hello,

I have a question about AICc and effective sample size in E-surge.

If I am not mistaken, AICc = AIC + 2k(k+1)/(n-k-1)

with k = number of parameters and n = effective sample size.

I read in a previous post (http://www.phidot.org/forum/viewtopic.php?f=5&t=1597&p=4636&hilit=sample+size#p4636) that the effective sample size is: total number of capture - number of animals retired.

But it does not seem to be the case.

If I use a dataset with no individuals retired, I manage to calculate the AICc and I find the same value as in the E-surge output.

But if some individuals are retired (RC=-1) then:

the values are different if I use n = total captures - number of individuals retired,

but the values are similar with n = total captures + number of individuals retired.

Could you confirm that the effective sample size used in E-surge is total number of captures + number of individuals retired? Or am I using a wrong formula?

Thank you,

Josefa