Why do fluent readers tend to comprehend expository texts better than less fluent readers?

Fluent readers tend to comprehend expository texts better because they are skilled at decoding words and phrases quickly, allowing them to allocate their cognitive resources toward understanding the meaning of the text. When reading is smooth and automatic, fluent readers can concentrate on the ideas being presented rather than struggling with the mechanics of reading itself, such as word recognition and pronunciation. This ability to focus on comprehension enables them to engage more deeply with the content, make connections to their prior knowledge, and synthesize information, all of which are essential for grasping complex concepts typically found in expository texts.

This reading fluency contrasts with less fluent readers, who may still be preoccupied with decoding words. As a result, their attention is divided, which detracts from their overall comprehension of what they are reading.