
I have 3 blocks with 5 treatments within each block.  We gathered
information from response variables at 5 different times on the same units -
so I have a longitudinal study.

If I call:

B: blocks        - a,b,c  (factor)
T: treatments  - A,B,C,D,E  (factor)
t: time            -  15, 30, 45, 60, 75 days (continuous)

How do I write the model and how do I determine the degrees of freedom?

I am thinking of these two options:

            lmer(y~t*T+(t|B)+(1|B)   or
            
            lmer(y~t*T+(t|B))

but I am not sure if either of those is correct to take into accout the random nature of the
blocks where the treatements are included.

I would really appreciate if someone could give me an insight on this.

Thanks,

Ricardo

 		 	   		  
_________________________________________________________________
żTienes poco tiempo? Accede a Hotmail mucho más rápido. Ver más

	[[alternative HTML version deleted]]


