Lexical and phonological effects in early word production

Area of Science:

• Child language acquisition
• Speech production
• Phonological development

Background:

• Understanding factors influencing early word production is crucial for identifying developmental trajectories.
• Lexical and phonological characteristics of words may impact speech variability and accuracy in young children.

Purpose of the Study:

• To investigate how word frequency, phonological neighborhood density (PND), age of acquisition (AoA), and phonotactic probability affect toddlers' word production.
• To analyze the influence of these factors on both whole-word variability and proportion of whole-word proximity (PWP).

Main Methods:

• Fifteen toddlers (2;0–2;5) produced monosyllabic words.
• Target words varied in word frequency, PND, AoA, and phonotactic probability.
• Phonetic transcription analyzed whole-word variability and PWP.

Main Results:

• Phonological neighborhood density significantly impacted PWP and variability; denser neighborhoods yielded higher PWP and lower variability.
• Word frequency affected variability (high-frequency words were less variable) but not proximity.
• Age of acquisition influenced proximity (earlier words had lower PWP) but not variability.

Conclusions:

• Lexical and phonological factors play distinct roles in shaping early speech production variability.
• Findings contribute to understanding emerging phonological representations in toddlers.
• Identifies specific factors influencing production variability in young children's speech.