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Titolo:
TECHNICAL NOTE - A CAUTION REGARDING THE KNOWLES APPARATUS FOR PSI-DEXTERITY
Autore:
THALBOURNE MA;
Indirizzi:
UNIV ADELAIDE,DEPT PSYCHOL ADELAIDE SA 5005 AUSTRALIA
Titolo Testata:
Journal of parapsychology
fascicolo: 3, volume: 60, anno: 1996,
pagine: 251 - 256
SICI:
0022-3387(1996)60:3<251:TN-ACR>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
4
Recensione:
Indirizzi per estratti:
Citazione:
M.A. Thalbourne, "TECHNICAL NOTE - A CAUTION REGARDING THE KNOWLES APPARATUS FOR PSI-DEXTERITY", Journal of parapsychology, 60(3), 1996, pp. 251-256

Abstract

In a 1967 study, E.A.G. Knowles used an apparatus consisting of an opaque bulb attached to a length of glass tubing, into which were rolleda number of steel balls, half natural silver, the other half blackened over a flame, in an attempt to produce either a perfect separation or a perfect alternation of the two colors. Because one particular outcome seemed to be occurring more frequently, regardless of the subjects' aim, I suspected bias in the device. I therefore carried out 2000 control trials. It was clear that the effect of blackening the ball bearings was to retard their exit into the glass tubing. I concluded that this apparatus produces biased outcomes and is therefore not suitable for testing psi.

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Documento generato il 10/04/20 alle ore 01:47:20