Hello everyone,
   I am going to ask this certainly tricky question here not (yet) with the 
intention of getting a definitive answer, as I need to deepen my questions much 
more, but just to have an approximate idea of which direction taking next. 
   I have a dataset where the potential response variables are categorical 
multinomial (ordered, I think): several people were asked to give a value from 
1 to 5 to several attributes in a potential partner, both for a short term 
commitment or for a longer relationship. The age, religion, sexual orientation, 
sexual identity (gender), self-perceived sexual attractivess and minimum 
attractiveness demanded in a potential partner (this ones also with values 1 to 
5) were recorded for each participant.   The idea is using the values given to 
attributes in potential partners as the response variable, and see to what 
extent these are influenced by the person's age, gender, religion and so on. 
   The problem is that all my variables are factors, I have no numeric ones. 
Also, as the values given to the same attributes for a short term commitment of 
for a longer relationship are expected to be correlated, I was considering 
using multiple response variables, which adds even more difficulty to the model.
   I have been reading about MCMCglmm, the course notes, which are not easy to 
understand. In any case, at some point I have read that if I don't want to fit 
random effects (as I think it's my case), I'd better use the pscl package 
instead.

   Can you give me any advice at this point? Should I try and use pscl, or is 
it better to try with MCMCglmm given the difficulty of the model? Any little 
help will be highly appreciated. 

   Thank you very much
   Iker.

__________________________________________________________________

   Dr. Iker Vaquero-Alba
   Visiting Postdoctoral Research Associate
   Laboratory of Evolutionary Ecology of Adaptations 
   School of Life Sciences
   Joseph Banks Laboratories
   University of Lincoln   Brayford Campus, Lincoln
   LN6 7DL
   United Kingdom

   https://eric.exeter.ac.uk/repository/handle/10036/3381


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