Does sound structure affect word learning? An eye-tracking study of Danish learning toddlers

Area of Science:

• Developmental Psychology
• Linguistics
• Speech Science

Background:

• Danish-learning children exhibit lexical acquisition delays compared to peers learning other languages.
• This delay is linked to the opaque phonetic structure of Danish, offering fewer reliable speech segmentation cues.
• Previous studies indicate Danish phonetic properties negatively impact online language processing in young children.

Purpose of the Study:

• To investigate how Danish phonetic challenges affect novel label-object mapping in toddlers.
• To examine the role of speech opacity in word learning for Danish-learning children aged 24-35 months.

Main Methods:

• Utilized eye-tracking technology to monitor children's attention and processing during word learning tasks.
• Presented novel label-object mappings using ostensive and ambiguous contexts.
• Employed carrier phrases with varying phonetic structures (more vs. less opaque) to assess speech input effects.

Main Results:

• Danish-learning children demonstrated poor performance in mapping novel labels to novel objects.
• The accuracy of word learning was significantly influenced by the phonetic opacity of the speech stimuli.
• Children struggled more with opaque phonetic structures, indicating processing difficulties.

Conclusions:

• The findings suggest an interplay between perceptually challenging Danish speech input and delayed vocabulary experience.
• These factors may contribute to a delayed onset of word learning skills in Danish-learning children.
• Phonetic opacity in early language input poses a significant hurdle for toddlers' word acquisition.