Summary of Findings:
This research examined the test-retest reliability of the Visagraph when used by classroom educators to measure silent reading efficiency in students ranging from second to twelfth grade (approximately 7 to 18 years old).
Mean values for each measure closely matched reading efficiency norms reported by previous studies. Across all measures, reliability was lowest in grades 2-4. In grades 6 and above, reliability coefficients averaged .86 for reading rate and .80 for fixations, with CVs between 9% and 11%.
“The present results provide estimates of measurement reliability at different grade levels using the Visagraph – data that can be useful when designing experiments (e.g., selecting sample size) and evaluating results.”