Screening Protocol for Early Identification of Brazilian Children at Risk for Dyslexia

Area of Science:

• Developmental Psychology
• Educational Psychology
• Linguistics

Background:

• Early identification of dyslexia is crucial for timely intervention but remains an educational challenge.
• Existing screening methods may not be culturally or linguistically adapted for diverse populations.
• Understanding predictive variables is key to effective dyslexia risk assessment.

Purpose of the Study:

• To develop a screening protocol for the early identification of Brazilian children at risk for dyslexia.
• To identify predictive variables for this screening protocol using Principal Component Analysis (PCA).
• To validate the identified factors against established national and international literature on dyslexia.

Main Methods:

• A screening protocol was developed based on a literature review and linguistic criteria, comprising seven cognitive-linguistic skills.
• The protocol included subtests for Letter Naming, Phonological Awareness, Phonological Working Memory, Rapid Naming Speed, Silent Reading, Word/Non-word Reading, and Auditory Comprehension.
• Principal Component Analysis (PCA) was applied to data from 149 first-grade children (ages 6-6.11) to identify underlying factors.

Main Results:

• PCA identified four main factors explaining 64.45% of the variance: 'pre-reading', 'decoding', 'Reading', and 'Auditory processing'.
• These factors align with known early indicators of dyslexia and reading difficulties in scientific literature.
• The 'pre-reading' factor included letter naming and phonological awareness, while 'decoding' involved rapid naming and word reading.

Conclusions:

• The developed screening protocol effectively identifies key cognitive-linguistic skills predictive of dyslexia risk in Brazilian children.
• The identified factors ('pre-reading', 'decoding', 'Reading', 'Auditory processing') provide a robust framework for early dyslexia detection.
• This research contributes a culturally relevant tool for educators and clinicians to support children at risk of reading disorders.