Overreliance on Sublexical Phonological Processing in Visual Word Recognition for Third-Grade Mandarin-Speaking...

Area of Science:

• Cognitive Psychology
• Developmental Neuroscience
• Linguistics

Background:

• Developmental dyslexia (DD) involves difficulties in sublexical orthographic, phonological, and semantic processing.
• Limited understanding exists regarding the specific processing types that dominate visual word recognition in DD children.

Purpose of the Study:

• To investigate the predominant sublexical processing (orthographic, phonological, semantic) in visual word recognition among DD children.
• To compare processing strategies between DD children and typically developing (TD) children.

Main Methods:

• Screened 50 DD and 47 TD third-grade native Chinese-speaking children.
• Utilized a picture-novel character mapping task with four types of pseudo-characters (semantic/phonetic radical, legal/illegal position).
• Employed multilevel logistic mixed-effects regression analysis.

Main Results:

• Semantic radical-legal position pseudo-characters were more predictive for TD children's responses.
• Phonetic radical-legal position pseudo-characters were more predictive for DD children's responses.
• DD children showed a stronger reliance on sublexical phonological processing compared to TD children.

Conclusions:

• Sublexical orthographic and phonological processing are predominant in DD children's visual word recognition.
• DD children may depend more heavily on sublexical phonological processing than TD children.