DangerousBeliefs said:
... snip... Why do paranormal investigators use electro-magnetic devices to detect ghosts?...snipe...
Here's my layman opinion.
1. Ghost, Electricity and magnetism have some similarities.
They are all "invisible", although their effect are visible.
So there is natural, intuitive association.
2. When electric and magnetism become measurable, it is natural to attempt to find out if ghost can be detected by magnetic or electrical means.
The realisation that magnetism produce electricity, and that electricity can produce magnetism should have created lots of hope that ghost is firmly based on scientific phenomenon.
3. The scientific notion of an equipment to measure, gave a sense of "professionalism", of "seriousness", of "high-tech". Both scientific minded researcher as well as self-deluded person will agree to that regardless of whether it works or not.
4. Unfortunately, it is impossible to arrange a double blind test since no one is able to get the ghost to collaborate.
5. It can never be verified that ghost DO NOT exhibit electrical or magnetic properties. Thus the continued hope that it does.
6. Young "scientists" continues to be enlightened by their "ingenuity" that there could be a link between mag/elect and ghost. So there is constant revival of the concept to associate ghost and electricity or magentism.
This forms a trend
DangerousBeliefs said:
Why not diving rods or geiger counters or some other nonsensical device? [/B]
7. Magnetism is "safe". Electricity is part and parcel of human body.
8. Radioactivity is dangerous. The Danger of a Radioactive site easily overshadow the danger of a ghost.
In short,
The scientific spirit of investigation probably started, and sustained all these.
These "scientific" approach is convienently adopted or exploited by people intended to perpetuate the lie that there is real ghost.