reading_boyIn a 2008 study, researchers Powers, Grisham, and Riles used the Developmental Eye Movement Test to measure the saccadic tracking skills of 684 ninth-grade students identified as having poor reading abilities.

Horizontal (saccadic) times were typical of grade 3 students; the average number of errors on the horizontal test was typical of grade 2 students. Both genders performed similarly. Retests showed slightly improved horizontal times and fewer errors, yet the grade-level equivalents remained dramatically low. Fewer than 10% of the students scored above the 50th percentile for eighth grade, suggesting that poor readers in high school might be at high risk for poor saccadic tracking.



1. Maureen Powers, PhD, David Grisham, OD, Phillip Riles, MA. Saccadic tracking skills of poor readers in high school. Optometry – Journal of the American Optometric Association

Volume 79, Issue 5 , Pages 228-234, May 2008 American Optometric Association. Published by Elsevier Inc. All rights reserved.


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