| Traditional researches often focused on the special visual cognitive ability of people with developmental dyslexia, which is a common learning disorder. Though psychologists have confirmed its physiological base by neurology research, there are still many controversies about its particular appearance. Many researchers have got new result by improve experimental material, and predicted that people would get the same result with similar material. There were a few researches on dyslexia people's visual cognitive ability in China, moreover, they all used plane material, not stereogram.In present research, we conducted two experiments with plane matching material and stereogram, ie. impossible figure. In experiment â… , we tested the ability of participants with developmental dyslexia, and compared them with normal participants. In experiment â…¡, we first let participants distinguish impossible figures, which had been used by Catya. Then we added a group of impossible figures according to Catya's theory and they are more close to the requirement. Thirty dyslexia participants were students in grade II from a junior middle school in Jianshui county, Yunnan Province. Participants in control group were stochastic normal students from the same grade in same school. According to the experiments, we got the following results.1. When the plane matching material was employed in testing task, participants with developmental dyslexia in Chinese condition had same appearance as participants in letter language condition, and they had less correctness than control group.2. When Catya's impossible figures were employed in testing task, participants with developmental dyslexia in Chinese condition no longer had less correctness than control group, but had not significantly more.3. When we use impossible figures on the base of Penrose Triangle Principia, participants with developmental dyslexia in Chinese condition had significantly more correctness than control group. |
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