Exploring Text and Icon Graph Interpretation in Students with Dyslexia: An Eye-tracking Study.

Area of Science:

• Cognitive Psychology
• Neuroscience
• Educational Psychology

Background:

• Research indicates individuals with dyslexia face challenges in graph interpretation.
• Orthographic processing deficits are a persistent characteristic of dyslexia.
• This study investigates the link between these deficits and graph comprehension.

Purpose of the Study:

• To determine if graph interpretation difficulties in dyslexia stem from processing orthographic elements like axes and labels.
• To compare the performance of students with and without dyslexia on graph comprehension tasks with varying label types.
• To explore the implications for understanding informational text processing in dyslexia.

Main Methods:

• 80 college students (with and without dyslexia) participated.
• Response times and eye movements were recorded during graph comprehension tasks.
• Graphs used word labels (mixed-modality) or icons (orthography-free); a sentence-only condition was also included.

Main Results:

• The dyslexic group showed slower response times only for sentence-based questions.
• Eye tracking revealed performance differences for mixed-modality graphs but not for orthography-free graphs.
• No significant group differences were observed when graphs lacked orthographic features.

Conclusions:

• Difficulties in graph processing for individuals with dyslexia are specifically linked to orthographic features.
• Dyslexia's impact on graph comprehension is evident when axes and labels contain text.
• Findings suggest a need to consider orthographic processing in educational materials for students with dyslexia.