Hi Bob,
Yes, I’m using the R package flipMaxDiff on top of stan.
Once the model has run, this results in an object of class ‘FitMaxDiff’ which includes a list of various outputs. The prediction.accuracies are output as part of that.
The FitMaxDiff object also includes an object called stan.fit (of class ‘stanfit’) which includes many different elements (including the standard model fit statistics rhat, ess, etc) so if there are respondent level fit statistics available in the standard stan output I can probably access them - I just don’t know what they are called as stan is so new to me.
The flipMaxDiff package seems ot have limited documentation so I was hoping someone here might be more familiar with it, but no worries if not.
To be honest, I’m also finding this approach prohibitively slow, per the conversations in Troubleshooting a "MaxDiff" hierarchical multinomial regression and Speeding up a hierarchical multinomial logit model - #21 by JustinYap so I may start looking for some other options to dun my maxdiff studies, outside of stan.
Cheers,
Scott