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Acta Psychologica Sinica
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The word frequency effect of fovea and its effect on the previewing effect of parafoveal in Tibetan reading
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Abstract  In the process of reading, readers mainly obtain information through the fovea region, and the role of the parafoveal region in information acquisition is also very important. The reader can obtain certain information from the parafoveal through previewing processing, thus promoting the improvement of reading efficiency, which is called the previewing effect. The effect of the processing load of the fovea on the previewing effect of parafoveal has become the focus of kinds of researches. For example, studies based on alphabetic languages have found that the previewing effect of the parafoveal is greater than that of the low-frequency word and the long word when fovea is a high-frequency word and a short word. Tibetan itself is analphabetic language, but it also belongs to the Sino-Tibetan language family, and there are existing many similarities with Chinese. Then, it is still largely unclear how to reflect the above role in the process of Tibetan reading. Will it only show the common characters of alphabetic language, or will it show some characteristics because of its Chinese characteristics? The present study aimed to provide experimental evidence for these issues. Two experiments were carried out on 119 Tibetan undergraduate students for the present study. The eye movements were recorded using an SR Research EyeLink 1000Plus eye tracker (sampling rate = 1000 Hz) during reading. Reading materials are Tibetan sentences. Experiment 1 manipulated the fovea word frequency (high and low frequency) to investigate the word frequency effect and word frequency delay effect of fovea words in Tibetan reading. The results showed that there was word frequency effect and word frequency delay effect in Tibetan reading. Experiment 2 manipulated both foveal word frequency and parafoveal previewing word types, with the aid of boundary paradigm, to investigate the previewing effect of parafoveal and the effect of fovea word frequency on the previewing effect of parafoveal in Tibetan reading. The results showed that there was a previewing effect of parafoveal in Tibetan reading, and when compared with low-frequency foveal words, high-frequency foveal words had a greater promoting effect on the previewing effect of parafoveal. The primary findings can be summarized as follows: (1)Significant word frequency effect exists in Tibetan reading, which is reflected in the whole process of vocabulary processing; (2)There is a significant word frequency delay effect in Tibetan reading, which runs through the whole process of vocabulary processing; (3)There is a significant previewing effect of parafoveal in Tibetan reading, through which the reader can extract the speech and font information; (4)In Tibetan reading, fovea word frequency affects the size of previewing effect of parafoveal. Moreover, word frequency only affects the extraction of shape previewing information in the early stage of lexical processing, that is, the previewing effect of high-frequency words is greater under the condition of shape previewing. In conclusion, the effect of the processing load of the fovea on the previewing effect of parafoveal shows the common characteristics of alphabetic languages in Tibetan reading. In addition, this study found the word frequency delay effect and the previewing effect of parafoveal in Tibetan reading, which supports the viewpoint of parafoveal sequence processing in the E-Z reader model.
Keywords Tibetan reading      Word frequency effect      Word frequency delay effect      Previewing effect      Eye movement.     
Corresponding Authors: Gao .Lei   
Just Accepted Date: 06 July 2020   Online First Date: 06 July 2020    Issue Date: 20 May 2020
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. The word frequency effect of fovea and its effect on the previewing effect of parafoveal in Tibetan reading[J]. Acta Psychologica Sinica, 2020-07-06 00:00:00.0. [Epub ahead of print] doi: .
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http://journal.psych.ac.cn/xlxb/EN/     OR     http://journal.psych.ac.cn/xlxb/EN/Y0/V/I/0
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