Poor readers but compelled to read: Stroop effects in developmental dyslexia

Area of Science:

• Cognitive psychology
• Developmental psychology
• Neuroscience

Background:

• The Stroop effect, a measure of selective attention and cognitive interference, is typically smaller in individuals with dyslexia.
• Dyslexia is characterized by difficulties in reading, including slow and inaccurate word recognition.
• Theories suggest that reading difficulties in dyslexia might alter the automaticity of word processing.

Purpose of the Study:

• To investigate the Stroop Color-Word Test performance in children with dyslexia compared to normal readers.
• To explore the relationship between reading ability and the magnitude of the Stroop effect in children.
• To determine if reading, despite being challenging, is an obligatory process in children with dyslexia.

Main Methods:

• A discrete-trial computerized version of the Stroop Color-Word Test was administered.
• The study included 24 children diagnosed with dyslexia, spanning second to fifth primary school grades.
• Performance was compared between children with dyslexia and age-matched normal readers.

Main Results:

• Children with dyslexia demonstrated a significantly larger Stroop effect than their normal-reading peers.
• This finding contradicts the expectation of reduced interference in individuals with reading impairments.
• The results suggest that reading, even when slow and effortful, is an unavoidable cognitive step.

Conclusions:

• The enhanced Stroop effect in dyslexia implies that word reading is an inescapable process preceding color naming.
• This challenges previous assumptions about the nature of cognitive interference in reading disorders.
• Reading, regardless of proficiency, appears to be a fundamental, automatic process engaged during such tasks.