Tag Archives: Magnetism

Galvanic Skin Response Pseudoscience

steven_novellaby via Science-Based Medicine

Selling snake oil is all about marketing, which means that a good snake oil product needs to have a great angle or a hook. Popular snake oil hooks include being “natural,” the product of ancient wisdom, or “holistic.”
Perhaps my favorite snake oil marketing ploy, however, is claiming the product represents the latest cutting-edge technology. This invariably leads to humorous sciencey technobabble. med_xray_specs_300pxThere are also recurrent themes to this technobabble, which often involve “energy,” vibrations and frequencies, or scientific concepts poorly understood by the public, such as magnetism and (of course) quantum effects. Historically, even radioactivity was marketed as a cure-all.
One category of technical pseudoscientific snake oil measures some physiological property of the body and then claims that this measurement can be used for diagnosis and determining optimal treatment. For example, machines might measure brain waves, heart rate variability, thermal energy or (the subject of today’s article) the galvanic skin response.
These are all noisy systems – they are highly variable and produce a lot of random results that can be used to give the impression that something meaningful is being measured. Systems that rely on these measurements to make highly specific determinations are no different than phrenology or reading tea leaves, but they look scientific.


The galvanic skin response

I was recently asked to look into a product called Zyto technology. This is an electronic device that you place your palm on top of so that it can read your “galvanic skin response” (GSR) to specific stimuli. It then uses your responses to prescribe a specific treatment.

The GSR is actually an older term for what is now called electrodermal activity (EDA), which is simply the electrical conductance of your skin (Harriet Hall has written about such devices before). Skin conductance is primarily affected by sweat, as salty water is an excellent conductor. So essentially the machine is measuring how sweaty your palms are.

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Magnet People: How Do They Work?

By Kyle Hill via The Committee for Skeptical Inquiry – CSI

. .. never mind that there is no evidence for these gaussy guys and gals, what would the world be like if people really did generate a noticeable or even intense magnetic field?


Strip club patrons would get quite a show, more so than usual, if people really were magnetic.

Amid the dollar bills and drunk-at-noon businessmen, a magnetic stripper, if she spun fast enough around the poll, would melt it. At the very least she would shock herself before shocking the crowd. When a conductor like metal meets a changing magnetic field, the magic of reality induces an electric current in it. Flip-flop this current around enough, and the metal heats up to the point of melting.

If people really were magnetic, they would be terrible navigators. Taking to their smart phones and computers, their screens would blur out and become unusable. Going back to the old methods, a compass wouldn’t help much either. It would be more likely to find you than Earth’s magnetic north.

Barrell MagnetLike all interesting human qualities, magnetic people would have a range of field strengths. Perhaps there would even be schools and universities dedicated to harnessing or improving your output. In any case, the strength of the field matters quite a bit. It’s the difference between being a glorified refrigerator magnet and being able to free fall down a metal tube without dying.

Magnetic people with the strength of refrigerator magnets would produce a field 100 times stronger than the Earth’s. But if any fortunate “Magnetos” existed, perhaps with MRI-like output, they would have one million times the field strength of Earth. For the refrigerator-strength people, you wouldn’t have to change much. But a public warning would have to go out whenever those Magnetos were about. Entire houses, entire cities, would have to be shielded; all metal objects not tied down turn into deadly projectiles. In fact, a rogue oxygen tank once proved this danger, killing a patient during an MRI scan after rocketing across the room, drawn by the monstrous amount of teslas. (You can see the incident re-created here.) And at this strength, you better avoid your friend’s stack of old floppy disks and unshielded hard drives, as you could shuffle their bits into blurry oblivion.

But it wouldn’t be all bad. Magnetic craftsmen would find that every part of their body has become a convenient tool and nail holder. Salmon fishermen could experience a huge boom. As salmon navigate their way home according to the Earth’s magnetic fields, a giant magnet in the form of a fisherman could disorient or even attract the fish. Magnetic lifeguards could take to the ocean as shark repellants.

Lovers might find it annoying however, as there is no telling when your poles, so to speak, would line up.

If people really were magnetic, it would eliminate the need for elevators, at least as a way down. A strong enough magnet can . . .

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