A parent watching their six-year-old write "bog" instead of "dog" often jumps straight to worrying about dyslexia. In most cases, that worry is premature, letter reversal is one of the most common and most misunderstood parts of learning to read.
Why b and d Are So Easy to Confuse
Unlike most objects a young child learns to recognise, letters are one of the only things where mirror-image orientation actually changes meaning. A chair is a chair whether you view it from the left or the right. A "b" flipped horizontally becomes a "d." Young children's brains are naturally wired to treat mirrored shapes as the same thing, which is efficient for recognising objects and actively unhelpful for reading letters, so reversal is, in a real sense, the default, not the exception.
When It's Completely Normal
Occasional b/d reversal, along with similar confusions like p/q or was/saw, is developmentally typical up to around age seven, and often persists in writing a bit longer than in reading. A child who reverses letters sometimes but not consistently, and who is otherwise progressing through phonics at a typical pace, is very likely just still building this specific skill.
When It's Worth a Closer Look
Reversal becomes more worth watching when it's persistent well past age seven, happens alongside other signs like slow decoding or trouble with rhyming, or shows up as a cluster with other reading difficulties rather than an isolated quirk. On its own, even at this stage, reversal is not a diagnosis, it's one data point among several worth tracking together.
What Actually Helps
Rather than repeated correction alone ("no, that's a d, not a b"), multisensory techniques tend to work best: tracing the letter shape while saying its sound, using a physical memory cue (some teachers use "bed," where the b and d of the word form the shape of a bed frame), and simply continuing consistent phonics practice, since reversal usually resolves as overall reading fluency builds.
Conclusion
b/d confusion is one of the most normal parts of early reading, not an early alarm bell on its own. What's worth tracking is persistence well past the typical age and clustering with other signs, which is exactly the kind of pattern a consistent phonics teacher is positioned to notice early.
Read more in our guide to signs of dyslexia in young children, or contact us if you'd like a second opinion on what you're seeing.
Sources
- International Dyslexia Association, on letter reversal as a typical versus atypical developmental pattern.
- Yale Center for Dyslexia & Creativity, on common myths and facts about dyslexia symptoms.