The most common linear mixed models in psycholinguistics, using JAGS and Stan

As part of my course in bayesian data analysis, I have put up some common linear mixed models that we fit in psycholinguistics. These are written in JAGS and Stan. Comments and suggestions for improvement are most welcome.

Code: http://www.ling.uni-potsdam.de/~vasishth/lmmexamplecode.txt
Data: http://www.ling.uni-potsdam.de/~vasishth/data/gibsonwu2012data.txt