The article, "Relative Importance of Intelligence and Visual Perception in Predicting Reading Achievement," by Quentin R. Bryan published in the California Journal of Educational Research for 1964? The study concludes that "visual perception appears to have relatively more weight than intelligence and reading readiness in predicting reading success in the first grade."
(1965). Did You See?. Reading Horizons: A Journal of Literacy and Language Arts, 5 (2). Retrieved from https://scholarworks.wmich.edu/reading_horizons/vol5/iss2/7