Psychological Monographs Volume 14

Psychological Monographs Volume 14

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 edition. Excerpt: ...was turning to the left; the table on which his arms rested, the room, his own body. In his left arm, there was the feeling of turning to the left. /hen the point of light seemed to he going down, it appeared to the subject that the table on which his arms were resting was under pressure. 'Charpentier (4) denies movements in the third dimension. J G. Additional description.--In general, it may be said that the apparent movement of the light is, or may be, of thIee_i:1i5tinctiypes, depending upon the length of the fixation and upon the position of the light in the field of vision. In the central portion of the field, particularly when the light is first fixated, there ensues a sl_ight quivering of the light. Sometimes this is confined to the edges, but more often the light as a whole seems to sway slightly. Following this, the light appears to move in some definite direction, sometimes in a straight line and sometimes along an arc..The direction of this apparent movement, in the central portion of the field of vision, is decidedly irregular. It may be in any one of the 360 degrees or all in succession. The rate is comparatively slow. In the peripheral portions of the field. the movement of the light, where the first phase is present at all, is very similar to the above description, except that there is more uniformity in the direction of the apparent movement. Sometimes, however, the first phase seems to be entirely lacking, Phase one shades with more or less gradualness into phase two. This consists of a more rapid movement, generally straight peripheralwards, and the velocity apparently increases the farther the light seems to move. The velocity of the apparent movement also increases directly the further peripheralwards the...
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Product details

  • Paperback | 134 pages
  • 189 x 246 x 7mm | 254g
  • United States
  • English
  • black & white illustrations
  • 1236986806
  • 9781236986801