b/d and p/q letter reversals: is it normal?

A common mix-up, not a sign by itself

The letters b, d, p and q are one shape turned in different directions. That is odd for a young child. A chair is still a chair whether you see it from the left or the right, but with letters, the direction changes everything.

Reversing letters or mirror writing isn't necessarily a sign of dyslexia. Dyslexia is defined by primary difficulties with accurate or fluent word reading, and researchers describe the idea that it comes from seeing letters backwards as a persistent myth. Only a qualified professional can say whether a child has dyslexia, and a reversal on its own is not enough for that.

Why mirror letters get mixed up

Brain imaging work with French and Japanese adult readers found that the area of the brain that recognizes written words treats a picture and its mirror image as the same when it is an object, but not when it is a word. The authors suggest that this tolerance for mirror images, which seems to be present in all primates, may explain the temporary mirror errors children make when they start reading.

Learning to read means setting that habit aside, because for letters a reflection is a different letter. Researchers describe a progressive unlearning of mirror invariance in children. That takes practice, which is one reason the confusion fades over time.

How long is it expected?

Understood.org says that reversing letters is typical and fairly common up until second grade, and that most children outgrow it as they get stronger at reading and writing. It also notes that most kids who reverse letters before age 7 end up not having dyslexia. For reference, second grade is Year 3 in England, around ages 7 to 8.

A review in Frontiers in Education adds that reversals early on, in kindergarten, are unrelated to later reading ability. No single age turns a reversal into a worry, and children vary, so the useful question is whether things are improving.

What helps

Start with the hand and the sound. Show your child how to form each letter in one flowing movement without lifting the pencil. Then let them trace it in sand or write it in the air while saying its sound. Understood.org suggests using more than one sense when you focus on a letter.

Pick one letter at a time. If your child is reversing b and d, begin with b, and hold off on d until the b is much steadier. A single memory cue can help too, such as "the bat comes before the ball" (the straight line comes first, then the round part). Choose one cue and keep using it, so you do not add another thing to mix up.

Reading specialist Linda Farrell shows another trick in a classroom video. Make a fist with the forefinger up so your hand looks like a b, then compare your hand to the letter: if the stick is on the same side of the circle as your finger, it is a b. She stresses that b and d are about shapes, not sounds.

What helps less

Teaching b and d together is best avoided: Understood.org advises holding off on d until b is much steadier. Guessing doesn't help either. In the b-hand routine, the child slows down and compares the letter to the hand instead of guessing. When your child slips, a short, calm reminder with the same cue every time works better than a lecture, and easy books keep reading pleasant.

When to talk to someone

Understood.org recommends talking to your child's teacher if you still see reversals by the end of second grade. The same article says that frequent backwards or upside-down writing beyond age 7 could signal trouble with reading or language, and that a weak memory for how to form letters or trouble telling shapes apart can also be behind it. The teacher sees your child in class and can suggest extra practice with letter formation or next steps. If you are worried, your pediatrician can help you decide whether an evaluation makes sense. Our guide to the signs of dyslexia covers what else to watch for, such as difficulty with the sounds in words or with reading words accurately and smoothly.

For the order in which letter sounds are usually taught, see the phonics progression. For a wider view, see what to do when a child is struggling to read.