He Yingchen, Baek Sori, Legge Gordon E
Department of Psychology, University of Minnesota, Twin Cities, MN, United States.
School of Medicine, Stanford University, Palo Alto, CA, United States.
Vision Res. 2018 Sep;150:8-14. doi: 10.1016/j.visres.2018.06.013. Epub 2018 Jul 19.
Evaluating the effects of print size and retinal eccentricity on reading speed is important for identifying the constraints faced by people with central-field loss. Previous work on English reading showed that 1) reading speed increases with print size until a critical print size (CPS) is reached, and then remains constant at a maximum reading speed (MRS), and 2) as eccentricity increases, MRS decreases and CPS increases. Here we extend this work to Korean, a language with more complex orthography. We recruited 6 Korean native speakers (mean age = 22) and measured their reading speed in central vision (0°) and peripheral vision (10° in the lower field). 900 Korean sentences (average 8.25 words) were created with frequently-occurring beginner-level words, presented using a rapid serial visual presentation (RSVP) paradigm. Data for English reading were obtained from Chung, Mansfield & Legge, Vision Research, 1998, for comparison. MRS was similar for Korean and English at 0° (713 vs. 787 wpm), but decreased faster with eccentricity for Korean. CPS was larger for Korean than for English regardless of eccentricity, but increased with eccentricity similarly for both languages. From 0 to 10°, MRS decreased by a factor of 6.5 for Korean and 2.8 for English, and CPS increased by a factor of 11.7 for Korean and 10.2 for English. Korean reading speed is more affected by retinal eccentricity than English, likely due to additional within-character crowding from more complex orthography. Korean readers with central-field loss may experience more difficulty than English readers.
评估字体大小和视网膜偏心度对阅读速度的影响，对于确定中心视野丧失者所面临的限制非常重要。先前关于英语阅读的研究表明：1）阅读速度随着字体大小的增加而提高，直到达到临界字体大小（CPS），然后以最大阅读速度（MRS）保持恒定；2）随着偏心度增加，MRS降低而CPS增加。在此，我们将这项研究扩展到韩语，一种拼写更为复杂的语言。我们招募了6名以韩语为母语的人（平均年龄 = 22岁），并测量了他们在中心视野（0°）和周边视野（下视野10°）中的阅读速度。使用快速序列视觉呈现（RSVP）范式，用常见的初级水平词汇创建了900个韩语句子（平均8.25个单词）。为了进行比较，英语阅读数据取自钟、曼斯菲尔德和莱格于1998年发表在《视觉研究》上的研究。韩语和英语在0°时的MRS相似（分别为713词/分钟和787词/分钟），但韩语的MRS随偏心度下降得更快。无论偏心度如何，韩语的CPS都比英语大，但两种语言的CPS随偏心度增加的情况相似。从0°到10°，韩语的MRS下降了6.5倍，英语下降了2.8倍；韩语的CPS增加了11.7倍，英语增加了10.2倍。与英语相比，韩语阅读速度受视网膜偏心度的影响更大，这可能是由于更复杂的拼写导致字符内拥挤加剧。中心视野丧失的韩语读者可能比英语读者面临更多困难。
