In early Finnish reading instruction, hyphens are used to denote syllable boundaries. However, this practice slows down reading already during the 1st grade. It has been hypothesized that hyphenation forces readers to rely more on phonology than orthography. Since hyphenation highlights the phonology of the word, it may facilitate reading during…

This study examined developmental profiles of reading fluency and reading comprehension in Grades 1 to 9 (ages 7 to 15) in a large Finnish sample (N = 2,518). In addition, early predictors of the profiles were analyzed with respect to kindergarten cognitive skills (phonological awareness, letter knowledge, rapid automized naming [RAN], number…