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Way to small and specific a population to generalize from (at least yet). But you have to watch out for assuming the converse is true. If we accept the proposition from the study:
if you are a psycopath ==> you behave this way
you still don't have any idea if the converse is true
if you behave this way ==> you are a psycopath
And until you can prove the later proposition, this is all just useless as a tool for anyone.