Topic Modelling on Participatory Assessment
LDA (Latent Dirichlet Allocation) Topic modelling with a visualisation from https://github.com/cpsievert/LDAvis
https://ropensci.org/blog/2014/04/16/topic-modeling-in-R/
More examples here:
http://cpsievert.github.io/LDAvis/reviews/reviews.html https://gist.github.com/inkhorn/9044779 https://gist.github.com/inkhorn/7257840