When too many vowels impede language processing: An eye-tracking study of Danish-learning children

Fabio Trecca*, Dorthe Bleses, Anders Højen, Thomas O. Madsen, Morten H. Christiansen

*Corresponding author for this work

    Research output: Contribution to journalJournal articleResearchpeer-review


    Research has suggested that Danish-learning children lag behind in early language acquisition. The phenomenon has been attributed to the opaque phonetic structure of Danish, which features an unusually large number of non-consonantal sounds (i.e., vowels and semivowels/glides). The large number of vocalic sounds in speech is thought to provide fewer cues to word segmentation and to make language processing harder, thus hindering the acquisition process. In this study, we explored whether the presence of vocalic sounds at word boundaries impedes real-time speech processing in 24-month-old Danish-learning children, compared to word boundaries that are marked by consonantal sounds. Using eye-tracking, we tested children’s real-time comprehension of known consonant-initial and vowel-initial words when presented in either a consonant-final carrier phrase or in a vowel-final carrier phrase, thus resulting in the four boundary types C#C, C#V, V#C, and V#V. Our results showed that the presence of vocalic sounds around a word boundary—especially before—impedes processing of Danish child-directed sentences.

    Original languageEnglish
    JournalLanguage and Speech
    Issue number4
    Pages (from-to)898-918
    Publication statusPublished - 1. Dec 2020


    • Danish
    • Language development
    • consonants
    • eye-tracking
    • speech processing
    • vowels


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