On Fri, 21 Dec 2012 05:23:12 -0800, Michael Britt wrote:
>Does anybody remember? What was that study in which monkeys were slightly
shocked - one monkey knew when the shock was coming but the other one
received
the exact same number of shocks but didn't know when it was coming? The
latter
monkey showed more signs of stress, indicating that this element of
unpredictability was really the important factor in stressful events?
Anyone know the original study on this? appreciate it,
The original article that was summarized in the Scientific American article
is:
Brady, .I.V., Porter, R.W., Conrad, D.G., and Mason, J.W.:
Avoidance behavior and the development of gastroduodenal ulcer.
J. Exper. Anal. Behav., 1:69-72, 1958.
One of the main problems with the research was that it was hard
to replicate; see:
Foltz, E.L. and Millett, F.E., Experimental psycho~matic disease
states in monkeys. I. Peptic ulcer- 'executive monkeys',
J. Surg. Res., 4 (1964) 445-453.
Quoting from Foltz & Millett:
|Our results do not support Brady's conclusions, that performance
|by rhesus monkeys on a conditioned avoidance schedule of six
|hours "on" and six hours "off" should produce peptic ulceration.
|Conditions in our laboratory resembled those environmental conditions
|described by Brady as closely as we could make them, and our
|conditioned avoidance program was identical.
For a comprehensive review of this and other research on the effects of
stress see:
G.B. Glavin, R. Murison, J.B. Overmier, W.P. Pare, H.K. Bakke, R.G. Henke,
D.E. Hernandez
The neurobiology of stress ulcers Review Article
Brain Research Reviews, Volume 16, Issue 3, September-December 1991,
Pages 301-343
-Mike Palij
New York University
[email protected]
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