Kanizsa型四角形の見かけの明度に及ぼす誘導野特性の効果
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概要
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In Kanizsa's square, effects of the polarity of inducing field on illusory brightness of test field were investigated using the matching method. 45 university students participated in this experiment. The "same" polarity meant that brightness of four pacmen was equal and the "mixed" polarity meant that the figure had two darker pacmen than others. Subjects observed six figures where the brightness of test field was constantly N6.2. The pacmen's brightness conditions were as follows: all N1.5, N1.5-N5.0, all N5.0, N5.0-N8.0, all N8.0 and N1.5-N8.0. The stimuli were presented at random and the visual angle of the figure was about 2.4 degrees. The results showed that the brightness of test field in the "mixed" polarity figure was judged between the illusory brightness of two "same" polarity figures where each pacmen's brightness was used in the "mixed" polarity figure. This may suggest that (1) the effect that the "mixed" polarity figure obtained through all pacmen is about a half effect of all darker pacmen, (2) the illusory brightness of the "mixed" polarity figure seems more influenced by the darker pacmen and (3) the effect of the lighter pacmen is covered with the one of the darker pacmen because the former is smaller than the latter. Moreover the illusory brightness of test field decreased according to the increment of contrast rate. This result did not agree with what Matthews and Welch (1997) reported, suggesting that a more systematic study may be necessary.
- 広島修道大学の論文
- 2001-09-28
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