1. Figure Legend: From: Crowding and eccentricity determine reading rate
Journal of Vision. 2007;7(2):20. doi: /7.2.20
Figure Legend:
Reading rate and context gain across studies. (a) Reading rate for ordered words as a function of letter size at 0°, −5°, and −10° vertical eccentricity (blue, red, and green, respectively). (b) Reading rate for unordered words as a function of letter size for 0°, −5°, and −10° vertical eccentricity. At every eccentricity, the rate is much less variable for unordered than for ordered words. Chung (2002) did not measure reading rate for unordered words. (c) Context gain as a function of letter size. Context gain is the ratio of reading rates for ordered and unordered words. Ordered reading rate is highly variable, so context gain is too. (d) The standard deviation of the log reading rate residuals in panels a and b. (The residual is the difference in log reading rate between the data point and the fitted curve.) The standard deviation for ordered text (0.14) is twice that for unordered text (0.07). The standard deviation of the context gain is even higher (0.16) and is well predicted (rightmost bar) by supposing that the ordered and unordered variations are independent. (Let Ro and Ru be log reading rate for ordered and unordered words. Let Ro/u = Ro − Ru be log context gain. If the ordered and unordered variations are independent then the sum of their variances will equal the variance of the context gain. The bar heights, left to right, are σo, σu, σo/u, and σo2+σu2).
Date of download: 10/25/2017
The Association for Research in Vision and Ophthalmology Copyright © All rights reserved.