1. Department of Communication Sciences & Disorders, Chapman University, Orange, CA 92866, USA
2. ReadWorks, Brooklyn, NY 11202, USA
3. Institute for Clinical and Translational Science, University of California, Irvine, CA 92617, USA
4. Readability Matters, Fort Collins, CO 80521, USA
5. School of Design, Royal Danish Academy, 1435 Copenhagen, Denmark