Chapter 5 Cognitive Learning Theories: Ausubel,s Learning Theory I had to reduce all educational psychology just one principle, I would say this: The most important single factor influencing learning is what the learner already knows. Ascertain this d teach him accordingly”Chapter 5 Cognitive Learning Theories: Ausubel’s Learning Theory “If I had to reduce all educational psychology just one principle, I would say this: The most important single factor influencing learning is what the learner already knows. Ascertain this and teach him accordingly