Individual Differences in the Adoption of Sound Change.
Cesko C Voeten
PMID 33103570WHAT IT FOUND
Flemish adults who moved to the Netherlands varied in adopting local Dutch vowel production.
Some sounded more like local speakers and some did not. Perception showed shifts for the whole migrant group but no clear individual pattern.
Key findings
01In production, the migrant participants were not homogeneous: 10 were classified with the Leiden group and the other eight with the Ghent group.
02In perception, cluster analyses found no robust individual groupings, so only group-level models were reported.
03Individual differences in perception accounted for 34% of variance in individual differences in production after adjustment.
STILL TO COME
How it was doneWhat they found
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What it does not show
The migrant group was small, which limited the individual-level perception analysis and prevented formal tests of age of arrival or length of exposure. The perception continuum for [eː~εi] did not sample the full range of possible realizations, so category boundaries were estimated over a limited range. The study measured laboratory vowel production and perception, not clinical speech outcomes or treatment effects.
The easy way to misread this
Do not read the production findings as proof that individual migrants changed their perception in the same way. The perception cluster analysis found no robust individual groupings, and only group-level perception models were reported.