[EDLING:2020] child language question

[sicola at DOLPHIN.UPENN.EDU]

Does anyone have a reference or two that mentions typical substitutions for 
the theta (voiceless-th) by young L1-English children? (E.g. My three-year-old 
nephew said "I'm free years old!" thus substituting [f] for theta.) I'm 
generally looking for typical developmental substitutions, though would be 
interested in examples of substitutions due to speech disorders as well, as 
long as it's in young children. Are there commonly-cited sources showing 
patterned substitution, particularly of the /s/, /t/ or /f/ (or other)?

Again, I'm specifically looking for L1, not L2, information.

Thanks!

Laura


-- 
Laura Sicola
University of Pennsylvania
PhD Candidate 
Educational Linguistics