Do you have to be specially trained in using the Facial Action Coding System (FACS) in order to use it in?

Question

your statistical analysis?

Answer 1

http://www.face-and-emotion.com/dataface/facs/description.jsp

Copy and paste into your explorer bar, and remember the BEST use of the internet, is google search, almost all your technically related question can be answered that way. Looks to be that it explains the different factors you need to notice with the human face, then gives you some excersises to better fine tune your ability to use the knowledge, sort of like a workshop, I might even do this!