視覚認知領域に関する実験的研究

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書誌事項

タイトル別名
  • AN EXPERIMENTAL STUDY ON THE VISUALLY RECOGNIZABLE AREA
  • シカク ニンチ リョウイキ ニ カンスル ジッケンテキ ケンキュウ

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抄録

The purpose and the method of this study was stated in the other paper named "An Experimental Study on the Visually Recognizable Area in the case of the Frontal Observation", and also in it the frontal Observation was stated, Synthesizing the above study and the present one, treated the oblique observation, it was scientifically clarified that; not only the small distance but also the small inclination make the difficulty of the observation increase; the larger both the distance and the inclination, the easier to observe; and its variation is proportioned to the solid angle, whose vertex is the eye, within the small distance and the large inclination; and when the eye goes across a certain limitting line, extended over a wide area containing both the front and the obliqueness, the difficulty becomes invariable. The inside of the limitting line could be called the "Nahbild-area", the outside the "Fernbild-area". The Nahbild-area is under the control of a physical principle such as the Solid angle law, and the Frenbild-area is under the control of a pyschological principle such as the perceptual constancy law. The Jimitting or critical line, in the case of the frontal observation, correspondes to the solid angle amounted of 0.154 steradian, and to the visual angle of 25°, and to the 2.5 times distance of the figure's size. Furthermore, the oblique limit of the Fernbild-area is 30° to the figure.

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