From Recognizing Known Words to Learning New Ones: Comparing Online Speech Processing in Typically Developing and...

Area of Science:

• Developmental Psychology
• Linguistics
• Speech-Language Pathology

Background:

• Early language development is crucial for cognitive and social-emotional growth.
• Identifying children with language delays, such as late talkers, is important for timely intervention.
• Understanding the nuances of speech processing in toddlers can inform diagnostic and therapeutic approaches.

Purpose of the Study:

• To investigate online speech processing in typically developing and late-talking 2-year-old children.
• To compare word recognition, word prediction, and word learning abilities between these two groups.
• To examine how toddlers utilize verbs and nouns during real-time language comprehension.

Main Methods:

• An eye-tracking task was administered to English-acquiring children.
• Participants included typically developing (n=67) and late-talking (n=30) toddlers.
• The task assessed recognition of nouns and verbs, prediction of noun referents using verbs, and learning of novel nouns.

Main Results:

• Both groups successfully recognized familiar nouns and verbs and used verbs to predict noun referents.
• Late talkers exhibited slower processing when orienting to targets using nouns and identifying referents using verbs.
• Despite slower processing, both groups demonstrated similar success in learning and retaining novel word meanings.

Conclusions:

• Late talkers show slower lexical processing, particularly with verbs, but this does not necessarily impair word learning.
• The ability of late talkers to learn novel words using familiar verbs suggests intact learning mechanisms.
• These findings provide a basis for future research on predictive measures of language outcomes and differentiating transient delays from language disorders.