A Guide to Reading and Writing Assessments for Dyslexia
However, as our understanding of neurodiversity evolves, these rigid benchmarks are being dismantled. For individuals with dyslexia, a diagnosis shouldn’t be a matter of “beating the clock.” Instead, it is about understanding the complex relationship between cognitive processing, task demands, and literacy.
In this guide, we explore the latest research on reading and writing speeds, specifically through the lens of dyslexia assessment, and why a holistic approach is the only way to truly support neurodivergent learners.
1. The Myth of the “Average” Reading Speed
In clinical and educational settings, “average” is often treated as a fixed point. But for someone with dyslexia, reading speed is highly elastic. It fluctuates based on the complexity of the text, the reader’s familiarity with the subject, and the specific strategies they use to decode words.
Silent Reading vs. Fiction and Non-Fiction
Research into healthy adults (ages 18–60) shows that there is a wide spectrum of “normal.” While the old benchmark was 250 wpm, the reality looks more like this:
- Non-fiction: 175–300 wpm (Average: 238 wpm).
- Fiction: 200–320 wpm (Average: 260 wpm).
The Dyslexia Perspective: For a person with dyslexia, the lower end of these ranges (below 175 wpm) is a significant indicator of difficulty, but it isn’t the whole story. Assessors now focus on long-form reading. Short passages often produce skewed results because they don’t account for the “settling in” period a dyslexic reader needs to build a mental model of the text. To get an accurate picture of a student’s capability, assessments should ideally use a single text requiring at least five minutes of sustained reading.
Why Oral Reading Isn’t Always the Answer
Oral reading is a common tool in dyslexia screening because it highlights struggles with phonological awareness and prosody (the rhythm and intonation of speech). However, for adults and higher education students, oral reading speeds usually plateau around age 14.
Because we can only speak so fast, oral reading hits a “ceiling” of approximately 183 wpm. For a mature student, a silent reading task is often a much better measure of their actual decoding efficiency and their ability to navigate academic material.
2. Speed vs. Comprehension: The Dyslexic Paradox
One of the most common misconceptions is that reading fast equals understanding well. In the context of dyslexia, this correlation is remarkably weak.
The Mechanical Reader
Some individuals with dyslexia develop “hyper-lexic” tendencies where they can decode words quickly but fail to retain the meaning. Conversely, many dyslexic learners are “slow but deep” readers. They may take twice as long to finish a chapter but emerge with a superior grasp of the nuances because they are manually “reconstructing” the meaning of every sentence.
Factors Beyond the Stopwatch
When assessing dyslexia, we must look at what is happening behind the scenes. Speed is influenced by:
- Visual Word Decoding: How quickly the brain recognizes the “shape” of a word.
- Working Memory: The ability to hold the beginning of a sentence in mind by the time you reach the end.
- Metacognition: The reader’s ability to realize, “Wait, I didn’t understand that paragraph,” and go back to re-read it.
Key Insight: In dyslexia assessment, “slow” isn’t just a number; it’s often a sign of a high cognitive load. The brain is working so hard to decode the letters that there is less “RAM” available for comprehension.
3. The Writing Speed Challenge: Why 25 wpm is Outdated
If reading speed is complex, writing speed is an even greater challenge. For years, 25 wpm was the “gold standard” for free writing in Higher Education. If a student was slower, they were often eligible for extra time.
Recent evidence, however, suggests that 25 wpm is actually an overestimate of what the average person produces under exam pressure. If we held every student to that bar, a massive portion of the “typical” population would qualify for support.
The New Benchmark for “Slow” Writing
Current best practices suggest that assessors should be cautious about labeling writing as “slow” unless it falls below 15 wpm for free writing. For handwriting, a standardized score of 75 or less is a clear cause for concern, while scores between 74 and 84 warrant further investigation.
Cognitive Load in Writing
Dyslexia impacts writing in several ways, and speed is often the secondary symptom. The real issue is the cognitive load hierarchy:
- Low Load: Copying text (purely motor skills).
- Medium Load: Dictation (listening and transcribing).
- High Load: Free writing, précis, or compositional tasks (planning, spelling, grammar, and original thought).
For a person with dyslexia, the transition from copying to composing is where the system breaks down. They may have a fast “copying speed” but an incredibly slow “compositional speed” because the effort of spelling and organizing thoughts drains their mental energy.
4. The Digital Shift: Typing vs. Handwriting
We are living in an era of cultural change. With the widespread use of laptops and tablets, many students’ handwriting skills are “atrophying” compared to previous generations.
In a dyslexia assessment, it is now vital to consider keyboarding fluency. If a student can type at 40 wpm but handwrites at 12 wpm, the “speed” issue isn’t a lack of ideas—it’s a grapho-motor or fine motor coordination difficulty often associated with dyslexia or dysgraphia.
5. Best Practices for Dyslexia Assessors
Moving forward, how should we evaluate these skills? The goal is to move away from arbitrary numbers and toward context-driven diagnostic reporting.
1. Focus on Processing, Not Just Output
For individuals with dyslexia, the justification for exam arrangements (like 25% extra time) should be based on processing difficulties. It’s not just that they write slowly; it’s that their brain requires more time to retrieve vocabulary, sequence ideas, and check for spelling errors.
2. Use Ranges, Not Averages
Instead of looking for a single “average” score, assessors should use typical ranges. This allows for the “spiky profile” often seen in dyslexia—where a student might have a high IQ and excellent verbal skills but a significantly lower reading or writing rate.
3. Task-Dependent Testing
Assessments must mirror real-life demands. If a student is in a law degree, their reading speed should be tested with complex, non-fiction academic text, not simple stories. The “speed” recorded during a simple copying task means very little compared to the speed recorded during a timed essay.
4. Holistic Reporting
A good assessment report doesn’t just list wpm. It describes how the person read. Did they lose their place? Did they squint? Did they use their finger to track lines? These qualitative observations are often more “diagnostic” than the numbers themselves.
Conclusion: Supporting the Individual
The shift away from “magic numbers” like 250 wpm and 25 wpm is a win for the dyslexia community. It acknowledges that neurodiversity cannot be measured by a stopwatch alone.
If you are a student, parent, or educator, remember that exceptionally slow reading and writing speeds are always a cause for concern, but they are only one piece of the puzzle. By focusing on the underlying processing challenges and providing holistic support, we can ensure that individuals with dyslexia are judged on the quality of their ideas, not just the speed of their pens.
Key Takeaways for Assessors
- Don’t panic over one number: A “slow” reading score on one test doesn’t define your intelligence or your potential.
- Context matters: Reading for pleasure is different from reading for a thesis. Make sure your assessment reflects your actual workload.
- Extra time is about equity: Extra time in exams isn’t an “advantage”—it’s a way to level the playing field for brains that process information differently.
