Gliding is typically eliminated between ages 5 and 7, depending on which sound your child is working toward. This phonological process, where children substitute a “w” or “y” for the “r” or “l” sounds (saying “wabbit” instead of “rabbit” or “yeyo” instead of “yellow”), is completely normal in young children. It becomes a concern only when it persists past the expected developmental window.
The Expected Timeline for Elimination
The American Speech-Language-Hearing Association places the likely elimination of gliding at ages 6 to 7. Other developmental charts put it slightly earlier, around age 5 to 6. The difference comes down to how strictly “elimination” is defined and which research the chart draws from, but the general range falls between 5 and 7 years old.
Compared to other phonological processes, gliding is one of the last to disappear. Fronting (saying “tar” for “car”) typically resolves by age 4. Stopping (saying “pish” for “fish”) resolves between ages 3 and 5, depending on the sound. Final consonant deletion (“ca” for “cat”) is usually gone by age 3. Gliding hangs around longer because the sounds it replaces are genuinely difficult to produce.
Why /r/ Takes Longer Than /l/
Not all gliding resolves at the same time. The “l” sound is typically mastered earlier than the “r” sound, and this gap matters when you’re watching for progress. A large review of acquisition studies found that 90% of children produce “l” correctly by the time they’re in the 4-to-5-year-old range, with a mean acquisition age around 54 months. The “r” sound lags behind, with 90% of children acquiring it between ages 5 and 6, at a mean of roughly 67 months. So a child who has dropped gliding on “l” words but still says “w” for “r” is following a normal pattern.
The reason comes down to what the tongue has to do. For “l,” the tongue tip makes firm contact with the ridge behind the upper teeth. That contact gives the brain clear sensory feedback, a solid tactile signal that helps children learn to reproduce the movement reliably. The “r” sound is different. It requires the tongue body to hold a precise shape in mid-air, with less physical contact and therefore less sensory feedback to guide the movement. Children essentially have to coordinate multiple independent tongue gestures at once, and that motor demand is why “r” is among the very last English consonants to be acquired.
When Gliding Signals a Problem
Gliding itself is classified as a typical phonological pattern, meaning it shows up regularly in normally developing children. If your child is still gliding at age 5 but making progress, that’s usually considered a phonological delay rather than a disorder. The distinction matters: a delay means a child is following the normal developmental path but on a slower timeline.
A phonological disorder, by contrast, involves error patterns that fewer than 10% of typically developing children ever use. Examples of atypical patterns include backing (saying “cap” for “tap”), or deleting consonants in the middle of words (“la-er” for “ladder”). Gliding doesn’t fall into that category. Research has found that gliding errors are actually more common in older children with milder speech difficulties, suggesting it represents an intermediate stage in mastering complex sounds rather than a sign of deeper impairment. Children who are gradually building the motor control for “r” and “l” may use gliding as a temporary simplification while their articulatory system catches up.
That said, if your child is still consistently gliding past age 7, or if gliding is making their speech hard for others to understand well before that, a speech-language evaluation is reasonable. The age cutoff isn’t a cliff. It’s a guideline. A speech-language pathologist can assess whether the pattern is resolving on its own or whether intervention would help move things along.
How Speech Therapy Addresses Gliding
When therapy is warranted, one of the most commonly used and evidence-based approaches is minimal pairs therapy. This method works by showing a child that the difference between two sounds changes meaning. The child is presented with word pairs like “rake” and “wake,” or “lip” and “yip,” where swapping the glide for the liquid creates a completely different word.
The process typically moves through three stages. First, the child is introduced to the pair and shown pictures representing each word, making the meaning difference concrete and visual. Next, the therapist says each word and the child practices identifying which one they heard, training their ear to distinguish the two sounds. Finally, the child practices producing both words themselves. This approach is particularly effective when the child’s only persistent error is the “r” sound, since the contrast between “r” and “w” is clear and the word pairs are plentiful.
Therapy doesn’t always take long. Because gliding is a developmentally typical pattern rather than an atypical one, many children respond quickly once they become aware of the sound contrast and develop enough motor control to produce the target sound consistently.
Does Persistent Gliding Affect Reading?
Parents often worry that ongoing speech sound errors will create problems once a child starts learning to read and spell. The research here is more reassuring than you might expect. A study tracking children with speech sound disorders found that those whose speech difficulties persisted into early school years did not have significantly greater literacy problems than children whose speech had normalized by that point. About 27% of children with persistent speech errors developed reading difficulties, compared to about 20% of those whose speech had resolved, and that difference was not statistically significant.
The bigger predictor of literacy outcomes was whether a child also had a language impairment, meaning difficulty understanding or using language more broadly, not just pronouncing sounds. Children with both a speech sound disorder and a language impairment scored notably worse on reading and spelling measures. Children with isolated speech errors, including gliding, were at much lower risk. So while it’s worth addressing persistent gliding for communication clarity, it doesn’t appear to set children up for reading failure on its own.