Ladewig
I lost an avatar bet.
- Joined
- Dec 4, 2001
- Messages
- 28,828
Here's kblood's thread: http://www.internationalskeptics.com/forums/showthread.php?t=217492
Thank you. Your advice on the matter is appreciated. I will bow out of this discussion.
Here's kblood's thread: http://www.internationalskeptics.com/forums/showthread.php?t=217492
So may I ask again: what success rate have you achieved in dry runs of this test protocol?
ETA: At the moment I cannot see how you calculate odds of over a million to one against chance success.
It depends on how many possible positions there are under each walkway (and having a limited number of defined positions to choose from is the only way I can see to avoid disagreements over whether any point he indicates is near enough to the actual position to count as a hit).It seems like 1/6 raised to the fourth power which is 1 in 1296 - which are appropriate odds for the preliminary test, but are nowhere near 1 in 1,000,000.
It depends on how many possible positions there are under each walkway (and having a limited number of defined positions to choose from is the only way I can see to avoid disagreements over whether any point he indicates is near enough to the actual position to count as a hit).
If there are four walkways and, say, five possible positions under each then if my Maths is correct (and it's pretty rusty so it may not be) the odds of picking the right ones by chance are 1 in 625, which isn't quite enough to beat the 1:1000 odds typically specified by JREF for the preliminary test.
A sixth possible position or a fifth walkway would raise the odds sufficiently, though a cheaper and easier way of doing so would be to make the hole digging more random. For example if DowserDon knows there are four holes in total but there can be anywhere between 0 and all four of them under each individual walkway the odds against picking the right positions would be much higher, so fewer and/or shorter walkways would be needed to reach the required level of difficulty.
What seems apparent from the replies and side-tracks resulting from my original query is that the world of sceptics is as riven as that of Christianity with its Catholics vs. Protestants and Islam with its Sunnis vs. Shias. So my slightly different approach will not please everyone. I do not expect it to.
A little of my history:- I worked for 27 years as a research chemist for the UK Electricity Generating Board, mainly working on water problems (scale deposition, demineralisation, trouble shooting). I had a rig with a lot of water flowing around it and someone had left a bent welding rod near it. I picked it up and found it did not quite balance properly (oh no, not water divining, I thought. I’m supposed to be a scientist).
At home I bent two rods and walked over the known route of my sewer and found that the rods swung as I crossed its line – ah, water, I thought (plus a few expletives).
I walked around my house and found that the rods crossed elsewhere. This turned out to be the line of my underground electricity and gas supplies. I rationalised this by remembering that most underground services are bedded on sand and gravel, so water could be seeping along the service routes.
My wife attended a conference on the coast and having got bored with reading whilst waiting for her, I remembered that the rods were still in my car.
I went for a walk along the cliffs and found two areas of very strong response – probably the remains of service ducts to wartime gun sites, I thought.
The next day I walked the same route but at coast level. The rods were not influenced by the sea water
but on looking up I found that there were waterfalls coming out of the cliffs where I had walked the day before. Oh dear, more links to water divining.
I visited a local park where there were two lakes, joined by a stream over which was a bridge. Standing on the bridge produced no response from my rods – so the effect was not from flowing water after all? I was perplexed.
I heard of Randi’s $1million challenge and, at that time read that he was moving trucks of water or soil on tracks at ground level whilst the dowser under test was on the floor above. I decided that I could not possibly pass that test, so forgot about the Challenge for many years.
During that time I taught many friends including scientists how to dowse. I did not consider the ability to dowse particularly unusual although inexplicable.
Later I heard that Randi was using copper pipes, some with water flowing others not and again decided that I would not pass that test either as I would detect the soil disturbed where all of the pipes were buried.
I was given a link to Randi’s YouTube video where he had a dowser on stage who claimed that he could detect an ore with dowsing rods. The ore was in plastic bottles beneath upturned buckets. My reaction was “what a poor simulation” of the conditions under which the dowser would normally operate (presumably a mine underground). I was annoyed.
On following links I found that Randi had used the same test for testing water dowsers. I was even more annoyed. Dowsing is not a spectator sport. It is not a theatrical entertainment.
It cannot be tested on a theatre stage. However, as I did not understand what mechanism drove dowsing to work I could not suggest a different test.
One property I dowsed for my son who was considering buying a house to live in produced a strange pattern of responses. I detected the route of the water supply but then detected a square of about 7 metres per side. Inexplicable until old plans of the area showed that the building had been a school with a buried air raid shelter. So perhaps I could detect the difference between soil and concrete or was the concrete covered in water. I was still mystified.
I attended a meeting of about 60 dowsers (strange lot – I did not join their society) and visited a site of archaeological interest. The site was divided up into small walkways that dowsers could traverse. They detected the hidden outline of the medieval church and this was confirmed by reference to documents deposited with the Archaeological Department of the local University. Personally I was able to detect the outline of a hut (minus the doorway) in the corner of the field. So perhaps a heavy building compresses the soil so much that its location can be discerned many years after. I did not subscribe to the idea that the “spirit” of the church lived on.
I admit that no dowser was forced to take the test but like me earlier, I assume they could not think of a better test.
I still do not know the motive force behind dowsing. It is still paranormal but not, I’m sure, supernatural.
This simulation would not exclude smell as being the motive force (animals can smell water miles away, elephants are known to excavate for it.
Who knows that we might have such a residual facility). At least the simulation would not exclude it as the previous tests have done.
Most “invisible forces” are electrical or gravitational. I would hope that my testing protocol would not exclude any unknown force but would be the gateway to its eventual identification.
I can see no link between my claims for dowsing using rods in the field and those made by people who use pendulums and maps. I can see no links between my claims and those by people who claim to diagnose disease by dowsing.
I would hope that by showing that dowsing’s paranormal status is only temporary I will assist Randi and other sceptical associations in refuting any supernatural claims being made in the future.
My claims are quite restricted and testable. I look forward to the test but first we need some land.
Answers to some questions.
The use of my sewer. A chemical analyst when doing an assay will commonly analyse a “Standard” solution in the same batch as the unknown, to prove that the method has not been performed in a faulty way. I knew that the sewer with water flowing in it was there and I used that knowledge to refine how slowly I had to walk across the “water” and how loosely to hold the rods. I didn’t know that the rods would move when I walked over my service trenches. Why should I expect that? As far as I had heard at that stage only water was dowsable. I was really looking for land drains to water soakaways around the house. Futher, the services were buried beneath tarmac – I’d never heard of anyone dowsing through tarmac. The sewer might have been found by an ideomotor effect but not the trenches, waterfalls and air raid shelter.
Water supply to prospective house for son. MRC Hans should never consider buying a house in the UK – the estate agents would eat him. The water supply had been diverted when the air raid shelter was put into the forecourt of the existing 19th C building. The supply had been diverted through its own land. That land had been sold separately some years ago, leaving the route for the water passing across the next property’s drive way and land.
Preliminary test. The protocol I am trying to arrange is for the preliminary test and with four lanes each with six numbered sheets of rigid plywood for me to traverse, the odds of getting all four correct are over 1000 to 1. The plywood alone will cost over £500. The experiment is scalable to the final test but, if I have been shown to successfully find all four trenches I would hope that a review of this preliminary experiment might find cheaper ways of constructing the final experiment. I could not afford the final test if it were to be 1000 times more expensive than the preliminary. So if a forum member really wants to see me put to the test, think of a way of disguising where trenches have been dug. I must not be able to see or feel with my shoed feet where the backfilled trenches are. Gravel and tarmac were considered but these might be unacceptable to the landowner unless you can find someone who is building a car park. Any suggestions?
Professor French’s protocol. As a new contributor to this forum I am not allowed to post URLs, however I hope that some of you will have looked at the YouTube video, /watch?v=i4MPz8h9gYY. There, Prof. French used three lanes of six bottles.
Ideomotor Effect. Did I find it odd that I could not detect water that I could see in the park and at the sea shore? I did then. It rather knocks the ideomotor effect, don’t you think. I was expecting a much stronger response than when dowsing through a layer of soil or tarmac. What I eventually postulate is that all dowsers, not just me, probably detect the interface between undisturbed soil and soil disturbed by man or nature (generally water). Yes, my experience is that most people can dowse using rods. Those I’ve not been able to teach include two commercial pilots – perhaps their natural response to rod movement seems to be to cancel it out and correct for it. I’ve taught a Justice of the Peace, two industrial chemists, a metallurgist and a pharmacist, biologist and telecoms engineer, their wives and many others. This is why I had no trouble in getting my application witnessed.
Science and its progress. I hope by now you can understand why I consider Randi’s experiments to be poor simulations of dowsing in the field and my suggested protocol to be a better simulation. Science is advanced by someone noting an anomaly, wondering why, suggesting ways of explaining it and then putting those ways to the test. This expands on previous knowledge. Randi and French have shown that no supernatural being helps dowsers. Randi and French have not shown that dowsing does not work because, I consider, their test simulation is too restrictive. They only test for the presence or movement of water. My suggested protocol does not exclude the presence or movement of water in soil but extends the definition of dowsing to disturbed soil interfaces.
Experimental simulation. For years all that a bridge builder had to do was to show that the design could bear enough weight. That was good enough when spans were small and the material of construction was stone. Metal bridges built to the same weight specification ran into trouble when built in windy areas – they wobbled. Now the simulation is not only how much weight it can carry but is it torsionally stable. Wind tunnel tests are vital. The simulation has been improved. Nowadays, I would expect the specification for unstable areas to include some simulation for earthquakes. Tests improve with time according to failure of earlier models.
I rather like the quotation used by Pixel42, "The correct scientific response to anything that is not understood is always to look harder for the explanation, not give up and assume a supernatural cause". David Attenborough.
My proposals may not be adequate but if so I hope they are not the last. Even perfection can be improved upon. You ask Rolls Royce.
Land. Prof French, on the one time I spoke to him, said that he thought a friend of his in Leicestershire had land and would be willing for it to be dug up. He promised to contact him. I am still waiting. Land is not easy to find in the UK.
Texas sharpshooter results. MRC Hans uses his imagination sometimes. What was surprising to me was the absence of false positive results. Other than the outline, font, altar and some well-defined grave areas, most of the other land was free from positive results. This was not at all a random pattern that had to be looked at hard in order to discern a pattern, the pattern was easily apparent.
Nonsense. That is the idea of using empty pipes: You may bee able to see where there are pipes, but you must detect which ones carry water. And, I predict from experience, you will find it impossible to find some land that is 'clean' enough for your purpose.
Please try to understand that JREF have accepted my claim that I dowse using rods to detect the interface between disturbed and undisturbed soil. They use “paranormal” to be “unexplained by science”, so do I. Not all paranormal observations remain explicable only by invoking the supernatural. Lightning was only explicable as a supernatural sign of disapproval by the gods until a couple of hundred years ago. Fortunately individuals have challenged this concept, thought of experiments to conduct, performed them and published. I hope to follow that route.
The ideomotor effect is alive and well in the blinkered minds of some of the contributors to this forum. If the idea is "dowsing", the motor effect is to dismiss its possible existence. I am putting my money where my mouth is and am eager to be put to the double blind test. I wonder whether MRC Hans would care to put his money forward to pay for the plywood, if I pass the preliminary test.
Why, do you not just display your superpower to folks instead of trying to convince us through stories?
That's correct. Not over a million to one but (judging by precedent) acceptable odds for the preliminary test.Preliminary test. The protocol I am trying to arrange is for the preliminary test and with four lanes each with six numbered sheets of rigid plywood for me to traverse, the odds of getting all four correct are over 1000 to 1.
If cost is a concern you might want to consider the tweak to the protocol I suggested, which would reduce the amount of plywood required. I don't have any suggestions for disguising the trenches I'm afraid.The plywood alone will cost over £500.
Um, no. The ideomotor effect is controlled by your unconscious, so you shouldn't expect the rods to react exactly as they would if your conscious mind was directing them.Ideomotor Effect. Did I find it odd that I could not detect water that I could see in the park and at the sea shore? I did then. It rather knocks the ideomotor effect, don’t you think.
How can you be annoyed? Protocols are agreed upon, so those dowsers were apparently satisfied with the method (at least before they failed). Who are you to judge how their claim should be tested?
I am putting my money where my mouth is and am eager to be put to the double blind test.
3. You and all but one of any observers should now leave the site ..... they call you and leave.
you should certainly do a [double blind] dry run of some kind before investing the time and money necessary for an official, formal test.
Never heard of that. I have heard of the Central Electricity Generating Board but that hasn't existed as such for more than 20 years. Is that what you intended to say?I worked for 27 years as a research chemist for the UK Electricity Generating Board...