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Kirby, John R.; Das, J. P. – Journal of Educational Psychology, 1977
Reading comprehension and vocabulary scores, and verbal and nonverbal IQ were significantly related to both simultaneous and successive processing ability in fourth grade Canadian boys. High levels of both types of processing ability are necessary for high achievement; high levels of one type only will result in moderate achievement. (Author/GDC)
Descriptors: Ability, Academic Achievement, Aptitude Treatment Interaction, Cognitive Processes