Re: [R] Doubts about mixed effect models

2012-03-21 Thread Bert Gunter
Post this on the r-sig-mixed=models list rather than here. However, fwiw, it is nonsense to estimate a random effect with a sample size of 3. That's trying to estimate variance with a sample size of 3. You can't do it with any meaningful precision. Whether or not the effect really **is** conceptua

[R] Doubts about mixed effect models

2012-03-21 Thread Lívia Dorneles Audino
Hi everyone! I have some doubts about mixed effect models and I hope someone could help me. I´m trying to analyze a dataset coming from samples of dung beetles in the same forest fragments along 3 consecutive years (1994, 1995 and 1996) and 14 years after (2010). I sampled dung beetles in 18 dif