Word learning in children with primary language impairment: a meta-analysis

Area of Science:

• Developmental Psychology
• Linguistics
• Speech-Language Pathology

Background:

• Language impairment (LI) affects novel word learning.
• Understanding factors influencing word learning in LI is crucial for intervention.

Purpose of the Study:

• To conduct a meta-analysis on novel word learning differences between children with LI and typically developing (TD) children.
• To investigate participant and task characteristics as moderators of word learning performance.

Main Methods:

• A systematic literature search identified 28 studies from PsycINFO, MEDLINE, and Web of Science.
• Data from 244 effect sizes were analyzed to compare word learning performance.

Main Results:

• Children with LI demonstrated lower word learning than age-matched TD peers.
• LI groups showed similar performance to language-matched TD peers.
• Age, cognitive abilities, receptive language, task type, and word exposure significantly moderated performance differences.

Conclusions:

• Novel word learning disparities between children with LI and age-matched TD peers are influenced by task and participant variables.
• These findings highlight the complexity of word learning in LI and inform targeted interventions.