Links Between Executive Functions and Decoding Skills in a Semitransparent Orthography: A Longitudinal Study from...

Area of Science:

• Developmental Psychology
• Cognitive Neuroscience
• Educational Psychology

Background:

• Executive functions (EFs) are vital for goal-directed behavior and cognitive regulation.
• The precise relationship between specific EFs and word decoding remains incompletely understood.
• Portuguese orthography presents a unique context for studying decoding development due to its semitransparent nature.

Purpose of the Study:

• To investigate the longitudinal predictive power of EF subcomponents on word decoding skills in young children.
• To determine the unique contributions of inhibition, working memory, and cognitive flexibility to decoding abilities.
• To clarify the dynamics of the link between EFs and decoding in a semitransparent orthographic system.

Main Methods:

• A longitudinal study involving 81 kindergarten children (mean age 5.36 years).
• Nonverbal performance-based tests assessed EF subcomponents (inhibition, working memory, cognitive flexibility).
• Decoding skills were measured in first grade using a pseudoword reading task, analyzed via three-step regression.

Main Results:

• Inhibitory control significantly predicted first-grade decoding skills.
• Working memory did not significantly enhance the prediction model when added.
• Cognitive flexibility emerged as a more significant predictor than inhibitory control, increasing explained variance.

Conclusions:

• Inhibitory control is important, but cognitive flexibility plays a more substantial role in predicting word decoding.
• These findings underscore the critical importance of fostering specific executive functions in early childhood for reading development.
• The study provides insights into the EF-decoding link within the context of Portuguese semitransparent orthography.