I am extremely skeptical of Paul Ekman's training products and research on lie detection in general. He no longer publishes studies in peer-reviewed journals, as he claims that to do so might jeopardize national security. I assess a significant chance that the actual reason for this is so that he can make money from selling expensive consultancy/training services without having to face critiques from the mainstream scientific community.
I'm considering taking Ekman's microexpressions training because it's cheap in both time and money. Has anyone here taken it? Did it work for you? How do you know?
The course does seem to come with tests included (both before and after), but if anyone has any ideas for some cheap tests I can do before and after to see if it really works, I'd be happy to do those as well, and report the results. Cheap tests should cost me less than three hours total and less than $100 total.
Alternately, if enough people here have done it we could pool our "before" and "after" scores to independently verify whether there's an effect.