Context and Objectives
Orthographic learning (OL) is the process by which written words transition from being unfamiliar to becoming visually recognized and correctly spelled. This process underpins both accurate spelling and fluent lexical reading. However, existing theory typically assumes a unitary system of OL. The SOL project challenges this assumption by exploring whether two distinct orthographic learning systems may exist: one for spelling (OL-Spelling) and another for reading (OL-Reading).
Work Performed and Main Achievements
The first study of SOL was conducted with 107 Spanish third-grade children. Using a self-teaching paradigm, children were repeatedly exposed to novel orthographic forms and later tested through:
• Reading speed improvements (OL-Reading)
• Orthographic choice tasks (OL-Spelling)
• Additional assessments for literacy and cognitive predictors (RAN, PAL, Visual Skills, etc.)
Key findings included:
• A significant reduction in reading time across exposures, indicating lexicalization.
• Better-than-chance recognition in the orthographic choice task, despite item difficulty.
• Critically, no significant correlation between OL-Reading and OL-Spelling performance.
These findings support the hypothesis of two partially independent learning processes. Moreover, the results aligned with prior studies reporting isolated reading or spelling deficits in dyslexic populations. The project also highlighted the role of cognitive predictors such as RAN in reading development.
Impact and Societal Relevance
SOL contributes to EU priorities on literacy and educational equity. By refining our understanding of early literacy development and identifying predictors of learning difficulties, SOL paves the way for earlier diagnosis and better intervention strategies. Future phases of the project will include cross-linguistic comparisons (Spanish vs. English) and neuroimaging investigations into the neural correlates of OL.
A novel assessment battery for teachers is also under development, aiming to detect children at risk of orthographic learning difficulties. This aligns with EU strategies to reduce early school dropout and promote educational fairness.