The Field of Distinct Vision; With Special Reference to Individual Differences and Their Correlations - Softcover

Ruediger, William Carl

Softcover

ISBN 10: 1236443683 ISBN 13: 9781236443687

Verlag: Rarebooksclub.com, 2012

Inhaltsangabe

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1907 Excerpt: ...had seen nothing of it, so that he could not tell even in which direction from the center it lay. After the data in the horizontal meridian had been obtained, a record of the letters not seen was kept, and appears in the table. He frequently said that he saw only half of the letter, which indicates that his boundary line of distinct vision is extremely sharp. The occasional recognition of letters beyond what appears to be his limit may be explained by small eye movements. Fixation is seldom, if ever, entirely steady.2 Although with an exposure time of 50 sigma, this subject could not tell even in which direction a letter lay, whose line of direction made an angle of 45 minutes or more with the line of sight, he was at no corresponding disadvantage in other visual tests. He himself had not known previous to these tests that he had a constricted field. He could distinguish buildings and a waving flag about as far from the fixation point as other people, and he was at no apparent disadvantage in seeing the carrier on the perimeter at 90 degrees in the outer field. His color zones were the smallest I found, but they formed no break in series with those of the other subjects. His visual acuity was fully up to the average. He is a slow reader and makes 1 Op. cit, p. 14. 2 Cf. C. N. Mc Allister, 'Points of Fixation in the Visual Field', Psych. Rev., Mon. Sup. Vol. VII, No. 1, pp. 17-54. many eye movements per line, but in neither of these characteristics did he take lowest rank. After the foregoing data had been collected, an attempt was made to standardize the unit of vision that was used. I aimed to draw a hook that would give approximately the same results as the n and the u. After a number of failures, closely corresponding results were obtained with a hook th...

Details zur Ausgabe

• Verlag: Rarebooksclub.com
• Erscheinungsdatum: 2012
• Sprache: Englisch
• ISBN 10: 1236443683
• ISBN 13: 9781236443687
• Einband: Taschenbuch
• Kontakt zum Hersteller: Nicht verfügbar
• Verantwortliche Person: Buchpark GmbH; gpsr@buchpark.de; ; Krügerweg 1; Trebbin; Brandenburg; 14959; Deutschland