Most 'paranormal' phenomena/effects are difficult to research scientifically since they are too difficult to produce on demand, and maybe they are illusory anyway. However, if one uses the old fingers on a glass and letters around the table method of 'communicating with the other side' (or whatever is really going on) it is very easy to reproduce the effect. Although I'm sceptical of many claims about the paranormal this one bothers me. I've done it many times and there is no doubt that something very odd is going on. It seems to me that this is an easily reproduced phenomenon and that as such it requires some sort of scientific explanation. Does anyone know of any formal (and respectable) research into it? I haven't had much luck with Internet searches so far.