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Titre : A course in experimental psychology. Part 1 / by Edmund C. Sanford,...
Auteur : Sanford, Edmund Clark. Auteur du texte
Éditeur : D. C. Heath (Boston)
Date d'édition : 1897-1898
Sujet : Sens et sensations
Notice d'ensemble : http://catalogue.bnf.fr/ark:/12148/cb372735278
Type : monographie imprimée
Langue : anglais
Format : 2 vol. (IV-183, VIII-p. 184-449) : ill. ; in-8
Format : Nombre total de vues : 280
Description : Collection numérique : Originaux conservés à la Bibliothèque H. Ey (C. H. Sainte-Anne, Paris)
Description : Contient une table des matières
Droits : Consultable en ligne
Droits : Public domain
Identifiant : ark:/12148/bpt6k77076b
Source : Bibliothèque H. Ey. C.H. de Sainte-Anne, 720-98
Conservation numérique : Bibliothèque nationale de France
Date de mise en ligne : 15/10/2007
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judged;thosebeyond 60° willseemtoo large. Thesubject will say that he is vertical, head downward, when he is yet 30-60~ from it. The subject may be allowed a pillow if he desires it.
Thé illusions dépend in large measure on thé distribution of pressure on the soles and other surfaces of thé body and thé direction of pressure of the movable viscera. and the blood.
Aubert (Delage), 40 ff. Breuer, 270 f.
SENSATIONS OF ROTATION.
47. Perception of Uniform Rotations. Let the subject be seated upon the rotation table with closed eyes, Mindfolded if necessa~ry. Turn the table slowly and evenly in one direction or the other. Thé subject will immediately recognize the direction and a-pproxima-tely the amount of rotation when the rate is as slow as 2° per second, or even slower. After continued rotation at a regular rate the sensation becomes much less exact or entirely fai!s. This fact has been generalized by Mach in thé law that oniy change of rate, not continuous rotation, is perceived. After some pauses and short movements in one direction and the other, the subject may become quite lost, and give a totally wrong judgment of the direction of motion, if it is slow. 48. Illusion. of Backward Rotation. Let the subject be seated as before. Rotate him a little more rapidiy for hait a turn, and then stop him suddenly. A distinct sensation of rotation in the opposite direction will resuit. Repeat, and when the illusory rotation begins, open the eyes. It immediately ceases. Close the eyes again, and, if strong, it again returns.
49. Location of thé Organs for the Perception of Rotation. a. Repeat thé first part of Ex. 48, letting the subject'