When you have two distinct sets of patterns that are somehow correlated, data mining is the technique to find a way to translate the information of one set into the other.
If one of the sets of patters is brainwaves, recorded by means of functional magnetic resonance imaging (fMRI) and the other set is either pictures or nouns, it seems to be possible to ‘see’ what we are thinking of.
In one study at Carnegie Mellon University Tom Mitchell and Marcel Just developed a sophisticated computational model that can predict the brain activation patterns associated with concrete nouns.
In another another study Kendrick Kay at the University of California, Berkeley, was able to tell with a fairly good accuracy wich picture the person was looking at, just by analysing fMRI patterns.
As you know all devices only get better and smaller. Watch out for the day that portable fMRI registration and analysation devices will exist, portable mindreaders (PMR’s for the friends), working from a distance.
You will better have to control what you are thinking …