Orthographic Knowledge, and Reading and Spelling: A Longitudinal Study in an Intermediate Depth Orthography

Area of Science:

• Developmental Psychology
• Educational Psychology
• Linguistics

Background:

• Orthographic knowledge is vital for reading and spelling proficiency.
• Its long-term impact on literacy development requires further investigation.
• European Portuguese presents an intermediate orthographic depth, offering a unique context to study these effects.

Purpose of the Study:

• To investigate the independent contributions of lexical and sublexical orthographic knowledge to reading and spelling.
• To examine the longitudinal influence of orthographic knowledge from Grade 2 to Grade 5.
• To determine how orthographic consistency affects the lexical influence.

Main Methods:

• Longitudinal study with two cohorts of Portuguese children (Grades 2-5).
• Utilized standardized measures of orthographic knowledge.
• Assessed word and pseudoword reading and spelling abilities.

Main Results:

• Lexical orthographic knowledge predicted word reading and spelling, and pseudoword spelling in early grades.
• Lexical orthographic knowledge at Grade 4 strongly predicted word spelling.
• Sublexical orthographic knowledge primarily influenced pseudoword spelling and reading in later grades.
• Orthographic knowledge showed a stronger and earlier impact on spelling than on reading.

Conclusions:

• Orthographic knowledge, especially at the lexical level, plays a significant role in literacy acquisition.
• The influence of orthographic knowledge evolves throughout literacy development.
• Lexical orthographic knowledge's impact may be modulated by the consistency of the orthography.