Phonological Process Milestones
Phonological Processes expected in typical development:
Reduplication (2-3 years)
Final Consonant Deletion (up to 3 years)
Prevocalic Voicing (up to 3 years)
Fronting (up to 3.5 years)
Epenthesis (up to 3.5 years)
Assimilation (up to 3.5 years)
Stopping (3-5 years)
Stridency Deletion (3.5 - 4 years)
Devoicing (up to 4 years)
Gliding (up to 4 years)
Cluster Reduction (up to 4 years)
Weak Syllable Deletion (up to 4 years)
Vowelization (up to 5-7 years)