快速序列视觉呈现、全屏显示和印刷显示下中文阅读参数的比较

Wang Chen-xiao, Lü Fan, Xu Dan, Chen Jie, Xie Ruo-zhong, Zhu Lian, Qu Jia

School of Ophthalmology and Optometry, Wenzhou Medical College, Wenzhou, Zhejiang, 325027, China.

Zhonghua Yan Ke Za Zhi. 2007 Aug;43(8):704-8.

OBJECTIVE

This study investigated reading speed of Chinese in rapid serial visual presentation (RSVP), full screen and printed display among young adults with normal vision. The critical font size and critical acuity reserve in RSVP were also evaluated.

METHODS

Thirty university students with a visual acuity of at least 20/20 in both eyes (uncorrected or corrected) were recruited in this study. The visual acuity threshold (VAT) (3 m distance) was evaluated for all subjects using a self-designed visual acuity chart presented on a computer screen. The reading speed for Chinese was measured under RSVP (10 font sizes from 4 to 33 pt), full screen and printed display (2 font sizes: 10 and 13 pt). The reading speed (wpm) was expressed as the percentage of words read correctly x 60 x total number of words/time used (second). The acuity reserve (RA) was expressed as RA = SP/ST, where SP was the font size of the reading material for the reader and ST was the acuity threshold expressed as a font size.

RESULTS

The visual acuity threshold (VAT) at a distance of 40 cm in these 30 subjects was (2.2 +/- 0.3) pt (mean +/- SD). The reading speed increased significantly with the increasing font sizes until the font size reached (7.8 +/- 0.4) pt where the maximum reading speed (258.0 +/- 34.4 wpm) was achieved. The reading speed remained at a constant value in font sizes ranging from 7.8 to 33 pt. The reading speed increased with the increasing R(A) until the R(A) reached 3.5:1 and then remained unchanged. There was no significant difference in reading speed between full screen and printed displays (P > 0.05). The reading speed in full screen or printed display was significantly faster than in RSVP (10 pt: full screen display versus RSVP: t = -10.15, P < 0.01; printed display versus RSVP: t = -8.77, P < 0.01. 13 pt: full screen display versus RSVP: t = -11.64, P < 0.01; printed display versus RSVP: t = -10.79, P < 0.01).

CONCLUSIONS

Young readers who use the computer as a reading tool can achieve a maximum reading speed for Chinese when the font size of the reading text is larger than 7.8 pt. A font size of at least 3.5 times the acuity threshold can attain a maximum reading speed for RSVP.

目的

本研究调查了视力正常的年轻人在快速序列视觉呈现（RSVP）、全屏显示和印刷显示中阅读中文的速度。同时还评估了RSVP中的临界字体大小和临界视力储备。

方法

本研究招募了30名双眼视力至少为20/20（未矫正或矫正后）的大学生。使用在电脑屏幕上呈现的自行设计的视力表，在3米距离处评估所有受试者的视力阈值（VAT）。在RSVP（4至33磅的10种字体大小）、全屏显示和印刷显示（2种字体大小：10磅和13磅）下测量中文阅读速度。阅读速度（每分钟单词数）表示为正确阅读单词的百分比×60×单词总数/所用时间（秒）。视力储备（RA）表示为RA = SP/ST，其中SP是读者阅读材料的字体大小，ST是以字体大小表示的视力阈值。

结果

这30名受试者在40厘米距离处的视力阈值（VAT）为（2.2±0.3）磅（平均值±标准差）。阅读速度随着字体大小的增加而显著提高，直到字体大小达到（7.8±0.4）磅时达到最大阅读速度（258.0±34.4 wpm）。在7.8至33磅的字体大小范围内，阅读速度保持恒定。阅读速度随着RA的增加而提高，直到RA达到3.5:1，然后保持不变。全屏显示和印刷显示之间的阅读速度没有显著差异（P>0.05）。全屏或印刷显示的阅读速度明显快于RSVP（10磅：全屏显示与RSVP：t = -10.15，P<0.01；印刷显示与RSVP：t = -8.77，P<0.01。13磅：全屏显示与RSVP：t = -11.64，P<0.01；印刷显示与RSVP：t = -10.79，P<0.01）。