Effects of angle size and length ratio in angle perception J Song, W H Jung |
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Department of Psychology, Chungbuk National University, Republic of Korea
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| The purpose of this study is to test the effects of angle size and length ratio on perceived size of an angle comprised two lines. In two experiments, stimuli were six angles ranging from 55°to 105°. In experiment 1, angles were compared to two conditions. One condition was consisted of two lines changed by a fixed ratio of left side lengths to right side lengths and second condition was comprised of two lines changed according to various ratios of left side lengths to right side lengths. In experiment 2, perceived angle were measured in two conditions(used in experiment 1) that were comprised of a fixed oriented or a flexible oriented line. The results showed that the angles tended to be underestimated the angle in below 80°. This result support previous studies. In contrast, perceived error of angle sizes decreased a lot in above 80°. Perceived angular sizes accuracy was not instrumentally affected by length ratio. These results suggest that angle detectors may exist and detect better obtuse angles than acute angles. This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (NRF-2009-371-H00012). |
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