I wasn't stating that there was not scientific basis behind the study of body language; only that if you are going to claim it, I would like to see it backed up with some science.
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However if you like to discuss the specifics I think it's a very interesting topic. Certainly there are some cues that can be garnered from the study of body language, although from everything I've read the role it can play is over-stated.
Interesting choice of examples: I'm a professional poker player and the role of live 'tells' is generally assumed by non-player playing populace to be much more important than reality[1]. Everything I've read recently about criminal profiling has thrown it in to a negative light and questioned it's validity[2].
A lot of NLP has entered in to 'commonly held beliefs' or is now considered 'intuitive'. When someone is lying they look to the left to access the right hemisphere; this type of hand shake implies dominance; all that jazz. This stuff is easy to test clinically and there is just not the evidence in support[3]. As you brought up eye movement, one study sourced in the Wikipedia article shown no evidence of "a person's preferred sensory mode of thinking can be revealed by observing eye movement cues"
This stuff is very easy to believe and is certainly 'intuitive'. But to my knowledge it has no scientific basis; but I'm certainly interested to read anything that shows otherwise.
1. http://www.pokerpages.com/articles/archives/negreanu30.htm
2. http://www.guardian.co.uk/uk/2010/may/15/criminal-profiling-... one article I read recently.
3. http://en.wikipedia.org/wiki/Neuro-linguistic_programming#Cr...