What is Stopping?
Stopping (St) is a phonological process which typically starts to eliminate at the age of 3 years, and continuing to assimilate into later developing sounds up to the age of 5 years. Stopping occurs when a fricative or affricate (types of sounds which allow air to escape the vocal tract as they are produced) is replaced by a stop (types of sounds which halt or do not allow airflow to escape the vocal tract). This most commonly impacts the first sounds within words.
Deaffrication is a subset of Stopping which describes the replacement of an affricate with a stop.
Examples:
seal = teal
sheep = teep
seven = seh-ben
cheetah = tee-tah
bridge = brid