Longitudinal normative data on developmental speech errors in French-speaking preschoolers: the average percentage of occurrences of phonological processes

Phonological process (PPs) are considered as developmental errors. PPs vary from one language to another. However, longitudinal developmental data in the French-speaking area of PPs are scarce. In this poster, we aimed to determine the average percentage of occurrences (POC) of the different PPs in French, from longitudinal data. 29 French-speaking typically developing children were followed longitudinally on their phonological productions from 3 to 5 years old. We have collected speech samples through a picture-naming test. The average POC of PPs was calculated following the methodology of similar studies. The changes over time of PPs' frequency were measured using Friedman ANOVAs for non-parametric repeated measures.
Average POC will make it easier for French-speaking SLP to categorize a patient's PPs occurrence and will improve their qualitative phonological assessment.