For reading to be fluent it must be accurate, at a reasonable rate and prosodic (Kuhn and Stahl, 2003). Accuracy and speed pertain to decoding automaticity and the word superiority effect (Reicher, 1969 – more here) but prosody (the ability to make oral reading sound like authentic oral speech (Rasinski et al., 2011)) is more nuanced and demanding to identify.
Prosody focuses on the features of speech that are layered...