I have been thinking about likert scales and the best way to analyze them. I came across this online book by Dwight Barry.
The book reminded me of the likert package and to utilize the Mann-Whitney test. What I found interesting in his approach to visualization was that the numbers are visualized instead of the category labels. I have always plotted the category labels and making the graph too busy. Thinking out loud–it may be useful for me to plot by numbers but not my intended audience.
Other resources I gave gather up over the past few days include the following:
Videos: Crosstab video
Packages:
vtree packages