How is a "sham" electric shock done?

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Offline Eric A. Taylor

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How is a "sham" electric shock done?
« on: 11/11/2010 06:45:21 »
On Cat's (Kat?) story about electro-shock improving math skills she mentioned that the control group was given a "sham" shock. How do you do that, considering it's quite obvious when you get an electric shock or you don't?

Also thaugh Chris said "Croaky Christmas" rather than "Chris Smith" Didn't have any idea what a croaky Christmas would be then I remembered it's November not December....
I was once a STAR!!! Well part of a star at least.

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Offline chris

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How is a "sham" electric shock done?
« Reply #1 on: 16/11/2010 16:28:07 »
Hi Eric

in the paper the researchers say that a current was applied for a very brief time; this mimicked the initial sensation that recipients report when being wired up in this way, but as the pulse was delivered for only a short time it was believed to be physiologically irrelevant and hence equivalent to no stimulus.

Chris
I never forget a face, but in your case I'll make an exception - Groucho Marx

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Offline Geezer

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How is a "sham" electric shock done?
« Reply #2 on: 17/11/2010 01:00:57 »
Oh! That explains it.

I thought they were being given a shamrock.
There ain'ta no sanity clause, and there ain'ta no centrifugal force Šther.

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Offline Eric A. Taylor

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How is a "sham" electric shock done?
« Reply #3 on: 18/11/2010 05:09:01 »
Hi Eric

in the paper the researchers say that a current was applied for a very brief time; this mimicked the initial sensation that recipients report when being wired up in this way, but as the pulse was delivered for only a short time it was believed to be physiologically irrelevant and hence equivalent to no stimulus.

Chris

But how do they know that this brief shock is equal to no shock at all. For that matter if a shock lasting .01 seconds has such a small effect as to be not noticeable and a shock lasting 1 second has a dramatic effect would a shock lasting 10 minutes have even more. Probably a shock lasting 10 hours would drive the person mad and that would be counter productive....or would it? A lot of great ideas have come from crazy people....

Sorry I'm American but I love the English term "mad" as in crazy. Could not pass up the chance to use it here
I was once a STAR!!! Well part of a star at least.

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Offline chris

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How is a "sham" electric shock done?
« Reply #4 on: 22/11/2010 22:05:15 »
Because even if it did have an effect, it was negligable compared with the impact of the "real" stimulus and therefore helped to blind the study without overtly affecting the outcomes.

Chris
I never forget a face, but in your case I'll make an exception - Groucho Marx

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Offline Eric A. Taylor

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How is a "sham" electric shock done?
« Reply #5 on: 06/12/2010 22:41:27 »
Would it be even more effective if while giving the test the shock is delivered only for incorrect answered.
I was once a STAR!!! Well part of a star at least.