Hi Trisha,
Thanks for this question! Let’s first make sure we are using terms the same way. When I think of a “weak reader,” I’m considering a person whose literacy is impacted for any number of reasons: decoding skills, familiarity with irregular words, automaticity reading words, comprehension, etc. So, a first-grade student who is skilled at memorizing high-frequency words may be fluent with simple, grade-level texts despite poor decoding skills. A large bank of “sight words” and using strong language skills as a compensatory strategy can help these students hide their weakness with phonics and/or phonemic awareness until later grades, when they are encountering new, unfamiliar words at a greater pace and lack the skills to sound these words out.
It is also possible that students are fluent readers but poor comprehenders. These are actually two different patterns: some students only appear fluent because they rely on memorization or context cues, while others are genuinely fluent readers whose comprehension is weaker than expected. Sometimes students who fit this profile of fluent readers but poor comprehenders are called “word callers,” although it’s not a label I love or find helpful.
Although fluency and comprehension share a reciprocal relationship (meaning improvements in one skill can support growth in the other), they do not correlate perfectly. That is to say, it is possible for students to be fluent readers but still not understand what it is that they are reading. The relationship between fluency and comprehension strengthens when we define fluency as not only automatic reading at a smooth, appropriate rate, but also with appropriate prosody (the rhythm, phrasing, and intonation of oral reading). You can find more information on these definitions in the AIM Fluency and Automaticity Skill Overview. Students who read with appropriate phrasing and expression are often more likely to comprehend what they are reading because prosody reflects attention to syntax and meaning, not merely speed. However, it is still possible for students to demonstrate discrepant skills in these domains.
Sometimes English learners fit the profile of having adequate fluency but poor comprehension if they have developed the skills to decode English text well, but not fully understand the vocabulary, syntax, and idioms in the passages they read. Some autistic students can also sometimes fit this profile if they have developed strong decoding or even hyperlexic reading skills while experiencing difficulty with inferencing, figurative language, perspective-taking, or overall comprehension. But this can also happen to readers for a host of other reasons. There are innumerable legal documents, journal articles, or textbooks I would not be able to understand despite the ability to read them fluently due to insufficient language skills and/or background knowledge of the topics discussed, which can also happen with young students. Readers with poor working memory and difficulty sustaining attention could also fit this profile, as well as those who are disengaged or otherwise unmotivated by the text. Have you ever read even a very simple passage aloud only to realize afterward that you had no idea what you had just read? I am certainly guilty of this.
Because of this, educators should be cautious about assuming that fluent oral reading automatically indicates strong reading ability overall. A student who reads quickly and accurately may still need support with vocabulary, background knowledge, inferencing, attention, or language comprehension. Likewise, a student who struggles to read smoothly aloud may nevertheless have strong understanding when text is read to them. This is one reason comprehensive reading assessment should examine multiple components of literacy rather than relying on fluency alone.
Thanks for checking in to help clarify these components!