darryl wrote:Just to confirm, a model is desired with a random effect on detection and not on occupancy? The former is possible in MARK, but not the latter. And coming back to Evan's earlier point, why do you desperately need to include a random effect?
I was hoping to create a model with a random effect on occupancy. It's because of the way my study was designed... Without getting too much into the nitty gritty of it, I have 10 sites that are grouped into pairs, and within each pair, one site receives a "human use" treatment and one site is the "no human use" control. Then halfway through the summer this treatment switches to the other site within the pair. For the second summer, the site that ended summer 1 with a treatment, continues to receive the treatment for the first half of summer 2, and then the treatment/control switches again for the second half of summer 2. It's basically an ABBA format, and because of this, my detection histories for each species for each half of each summer are stacked on top of each other. So it looks like I have more sites than I do, which is why I need to include site as a random effect. Does this make sense? Or maybe I'm approaching this wrong...?