Fronting is the substitution of a sound produced in the back of the mouth with a sound produced in the front of the mouth (e.g. “tey” for “key”). This pattern resolves by 3.5 years of age.

When should phonological processes be eliminated?

By age five most children naturally outgrow their use of phonological error patterns.

Why does fronting happen?

Peaks fronting occurs when the sample capacity of the analytical column is exceeded, which can happen in both GC and HPLC experiments. This overloading effect results from poor sample solubility in the stationary phase, the injection of too much sample, or operating at a “k” value (capacity factor) that is too low.