Recent research into the reading process has identified factors other than efficiency in word recognition which account for reading fluency. The automatization of decoding skills exhibited by better readers has been attributed to, among other things, opportunities. Olshavsky (1977), for example, found that poor readers used the same range of strategies as good readers, but had less opportunity to practice and develop them.
Swanson, B. B. (1990). Reading Fluency and the Novice Reader. Reading Horizons: A Journal of Literacy and Language Arts, 30 (4). Retrieved from https://scholarworks.wmich.edu/reading_horizons/vol30/iss4/1