3y 0m
Consonant Acquisition Norms
Crowe & McLeod (2020) · 15 US studies · 18,907 children · 90% acquisition criterion
🟢 Acquired / Expected by this Age
90% criterion met before this age band — missing sounds indicate clinical delay
Age 2;0 – 2;11
🟡 Currently Emerging
Actively developing within the current 12-month window
Age 3;0 – 3;11
⚪ Later Developing
Not yet expected — avoid premature targeting
Age 4;0 – 4;11
Age 5;0 – 5;11
Age 6;0 – 6;11