By: nick_name

nick_name — Thu, 16 Dec 2004 04:43:28 +0000

Persinger had more to say than just that Granqvist didn’t replicate his reasearch. Apparantly the Swedish researchers failed to calibrate their computer, which was running software calibrated for the 286 PC (20 mhz or so). It’s a DOS software that has significant distortions in the output when run under windows. Granqvist reported a lack of ‘sensed presence’ experiences, but his procedures weren’t the same as the ones that produce it in 80% of the population.
Persinger uses a large acoustic chamber for his research. Granqvist used a 1.4 x 1.4 meter cube (quite small by comparison) for his.
In contrast to the claim made by Granqvist, Persinger uses double-blind protocols. Here are a few sample papers where they were not only followed, but described in the paper:
M. A. Persinger, Increased emergence of alpha activity over the left but not the right temporal lobe within a dark acoustic chamber: differential response to the left but not the right hemisphere to transcerebral magnetic fields. Int. J. Psychophysiol. 34 (1999) 163-169.
M. A. Persinger, The sensed presence within experimental settings: implications for the male and female concept of self. J. Psychol. 137 (2003) 5-16.
M. A. Persinger, F. Healey, Experimental facilitation of the sensed presence: possible intercalation between the hemispheres induced by complex magnetic fields. J. Nervous Mental Dis. 190 (2002) 533-541.
Granqvist used 15 minute exposures to the signals, and these are just not long enough to have any significant effects for all but a very few people.
For more information:
http://tinyurl.com/6uodl
-and-
http://laurentian.ca/neurosci/News/Dec_news.htm
The second link is to Persinger’s own response to Granqvist

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By: nick_name